INTEGRATED SYSTEM FOR DATA ACQUISITION AND NUMERICAL ANALYSIS OF THE SHIP RESISTANCE PERFORMANCE IN THE TOWING TANK OF GALAÞI UNIVERSITY


 Janel Ryan
 2 years ago
 Views:
Transcription
1 INTEGRATED SYSTEM FOR DATA ACQUISITION AND NUMERICAL ANALYSIS OF THE SHIP RESISTANCE PERFORMANCE IN THE TOWING TANK OF GALAÞI UNIVERSITY DAN OBREJA, LEONARD DOMNIªORU, FLORIN PÃCURARU University Dunãrea de Jos of Galaþi, 111 Domneasca Street, Galaþi, Romania Tel.: (+40) , Received September 26, 2006 There are presented the towing tank facilities at the Galati University. We focus on the software BAZIN developed at the Naval Architecture Faculty, for the analysis of the ship resistance experimental data. There are also included the theoretical background and the significant results for a Panamax bulk carrier ship model. Key words: ship resistance, experimental methods, software for data analysis. 1. INTRODUCTION With all our modern computer facilities and many years of dedicated effort in developing and applying the theories concerning the hydrodynamics of marine vehicles we must still rely on experimental model test results [2]. The major curricula and the associated research interests justify the laboratory facilities at the Naval Architecture Faculty, presented in Fig. 1. The main experimental naval architecture goal is to understand the significance and the limitation of scale model testing and the proper use of the model test results in ships performance prediction. 2. TOWING TANK EXPERIMENTAL FACILITIES The Towing Tank of Dunarea de Jos University of Galati, presented in Fig. 2, is of meters in size [3]. Depending on the model scale, a maximum speed of 3.5 m/s can be realized on the basis of the gravity towing system. A hydraulic wave generating system is used in order to induce regular longcrested waves from 1 m to 15 m in length and a maximum height of 0.20 m. The wave height sensor is of resistance wire type. Paper presented at the National Conference on Applied Physics, June 9 10, 2006, Galaþi, Romania Rom. Journ. Phys., Vol. 53, Nos. 1 2, P , Bucharest, 2008
2 Fig. 1 Ship Hydrodynamics Laboratories of the Naval Architecture Faculty. Fig. 2 The Towing Tank of the Naval Architecture Faculty.
3 3 Integrated system for data acquisition 139 The ship resistance force is measured by means of electronic dynamometers with an accuracy factor of about 0.2%. The velocity transducer is based on an impulse generating sensor with the accuracy factor of maximum 1%. The towing tank is equipped with a digital computer data acquisition and analyzing system for 24 channels. The facilities of the towing tank are supplemented with digital photo and video camera, to have an additional visual record of the own wave train. To permit the quick expansion of still water test data to ship scale results, a new computer program is used (chapter 4), based on the experimental methodology presented in chapter EXPERIMENTAL METHODOLOGY (FROUDE METHOD, ITTC1957 [7]) In the resistance tests, the resistance force R T m and the speed of the model v m are measured. In Froude s approach there are the following fundamental characteristics: in the case of Froude similarity, the residual resistance coefficient is of the same value, on model and full scale, at the same forward speed; the frictional resistance is equal to that of a flat plate of equal wetted surface area and length, at the same forward speed; the residual resistance and the frictional resistance are independent of each other. The procedure ITTC1957 to determine the total resistance for the ship, R Ts, is as follows [1, 6, 7]. 1. Determine the total resistance coefficient, c T m, in the model tests: RT m ct = (1) m 1 ρ 2 2 m vm Sm where R T m is the model total resistance, ρ m is the fresh water density, v m the model speed, while S m represents the model wetted surface. 2. Calculate the frictional coefficient, c F m, for model by the ITTC1957 formula: c F m = 0,075 2 ( log Rn 2) where Rn m is the Reynolds number for the model defined as: m vm LWL Rn = m m (3) υm while, L WL m is the model length of waterline and υ m represents the coefficient of kinematical viscosity of water, depending on the temperature. (2)
4 140 Dan Obreja, Leonard Domniºoru, Florin Pãcuraru 4 3. The Froude number calculation (the same for ship and model): vm Fn = = g L WLm v s g L WLs (4) where g is the acceleration due to gravity, v s is the ship speed and L WL s is the ship length of waterline. 4. Calculate the residual resistance coefficient, c R, same for model and ship: c = c c (5) R Tm Fm 5. Determine the total resistance coefficient, c T s, for the ship: c = c + c + c (6) Ts Fs R A where c F s is the frictional coefficient for the ship and c A is the correlation coefficient ([7]). The frictional coefficient of the ship is calculated by the ITTC1957 formula: 0,075 cf s = (7) log Rn 2 ( ) 2 s where Rn s is the Reynolds number for the ship: Rn = v L υ (8) s s WLs s ( υ s represents the coefficient of kinematical viscosity of salt water for the full scale case, at 15 C). 6. Determine the total resistance ship: R = c 1 ρ v2 S s s 2 T T s s s R T s and the effective power P E for the ; P = R v (9) E Ts s where ρ s is the water density for the full scale case (15 C), (6) and S s is the ship wetted surface. c T s is calculated with 4. COMPUTER PROGRAM FOR EXPERIMENTAL DATA ANALYSIS For the post processing analysis of the experimental data obtained at the towering tank, for the ship resistance, we have developed our eigen program BAZIN, in the frame of the Naval Architecture Faculty, at the University Dunãrea de Jos Galaþi, with Pascal code ( version compiler [8]).
5 5 Integrated system for data acquisition 141 Fig. 3 The main logical scheme of the BAZIN program.
6 142 Dan Obreja, Leonard Domniºoru, Florin Pãcuraru 6 Fig. 4a General Data Menu of the BAZIN program.
7 7 Integrated system for data aquisition 143 Fig. 4b Ship Resistance Post processing Menu of the BAZIN program.
8 144 Dan Obreja, Leonard Domniºoru, Florin Pãcuraru 8 The logical scheme of program BAZIN is presented in Fig. 3. The program has four main menus as following: 1. The File Menu In this sections there are included the commands for creating a new data base files, opening an existing data base files, general information of the data base files. The data base for a ship application includes a total of 15 files. The first 8 files include the general input data and also the experimental data obtained at the towing tank test on ship models. The last 7 files will include the post processing results of the ship resistance experimental analysis. 2. The General Ship Data Input Menu (Table 1 and Fig. 4.a) There are included the commands for the input of: the main characteristics of the ship, the experimental conditions in the towing tank, extrapolation characteristics from ship model to the ship scale condition. It results at this section the main characteristics of the ship model. 3. The Ship Resistance with no Appendages (see Tables 2 4 and Figs. 4.b, 6 8) There are presented the commands for: the input of the experimental model tests results (Table 2) and associated diagram (Fig. 6), the expansion of still water test data to ship scale results (Tables 3 and 4, Figs. 7 and 8). 4. The Ship Resistance with Appendages In this sections there are included the commands for the analysis of ship resistance experimental data in the case with appendages. This section has the same submenus structure as section RESISTANCE TESTS FOR A PANAMAX BULK CARRIER MODEL The prediction of the resistance and power performance of a ship is based on the results of model experiments carried out in a towing tank. Also, the quality of the designed hull form is validated by means of model experiments. In this chapter there are presented the post processing results with the BAZIN program, at experimental ship resistance analysis for a Panamax bulk carrier model. The fore body lines plan with a high angle of water plane entrance, the wave pattern interference phenomena and the breaking waves are the main causes of ship resistance increasing. The wave pattern at heavy condition (v = Kn) is given in Fig. 5. The characteristics of the ship and of the experimental model (1:80 scale) at heavy condition are presented in Table 1 ([4, 5]). The tests results for the model at heavy condition are given in Table 2. The full scale extrapolation at heavy condition is given in Table 3. The model resistance diagram at heavy condition is given in Fig. 6.
9 9 Integrated system for data acquisition 145 Fig. 5 Wave pattern at full load, v s = Kn. Table 1 Full scale ship and model main characteristics for heavy condition Main characteristics Symbol FULL SCALE SHIP Model Length of waterline L WL [m] [m] Length between perpendiculars L BP [m] [m] Breadth of waterline B [m] [m] Draught mean T M [m] [m] Draught at forward perpendicular T F [m] [m] Draught at aft perpendicular T A [m] [m] Longitudinal centre of buoyancy LCB [m] [m] Volumetric displacement [m 3 ] [m 3 ] Wetted surface (bare hull) S [m 2 ] [m 2 ] Water temperature T 15.0 [ o C] 7.0 [ C] Water density ρ [t/m 3 ] [kg/m 3 ] Water kinematical viscosity υ E6 [m 2 /s] E06 [m 2 /s] Gravity acceleration g [m/s 2 ] [m/s 2 ] Block coefficient (based on the waterline length) C B Midship section coefficient C M Waterline coefficient C W
10 146 Dan Obreja, Leonard Domniºoru, Florin Pãcuraru 10 Test No. R v m [m/s] Fn Rn T m m [kgf] Table 2 Model tests analysis at heavy condition E E E E E E E E E E E E E R Tm [N] c Tm cf m c R Test No. v s [Kn] R ns Table 3 Full scale extrapolation at heavy condition c c F s R c A c T s R T s [kn] P E [kw] E E E E E E E E E E E E E
11 11 Integrated system for data acquisition 147 Fig. 6 History of model resistance (heavy condition). Fig. 7 History of ship resistance (heavy condition). The ship resistance diagram at heavy condition is given in Fig. 7. The effective power diagram at heavy condition is given in Fig CONCLUSIONS From the analysis of the experimental data it results that the prognosis of ship resistance and effective power was performed with an overall accuracy of ±3%.
12 148 Dan Obreja, Leonard Domniºoru, Florin Pãcuraru 12 Fig. 8 History of effective power (heavy condition). The use of program BAZIN made possible to speed up the post processing of ship resistance experimental data, so that the researcher is able to analyse and to validate the results in the same time with the experiment. Acknowledgment. The present work has been carried out for the German Company HARMEN OLDENDORF through the SHIP DESIGNED GROUP Galati, Romania. The authors wish to thank the staff of these companies for all their support. REFERENCES 1. V. Bertram, Practical Ship Hydrodynamics, ButterworthHeinemann, C. D. Obreja, G. Popescu, F. Pacuraru, The Towing Tank of the Dunarea de Jos University of Galati. Present and Future Plans for New Test, Proceeding of the International Symposium NAV.MAR.EDU., Constanta, C. D. Obreja, G. Popescu, O. Ionas, F. Pacuraru, Experimental Techniques for Vortices Investigation Around the Ship Model, Scientific Bulletin of the Politehnica University of Timisoara, Transactions on Mechanics, Proceedings of the Workshop on Vortex Dominated Flows, p , Timisoara, C. D. Obreja, G. Popescu, L. Domnisoru, F. Pacuraru, Resistance Test Report for Panamax Bulk Carrier Model (E601), Research Project No. 377/2005, Dunarea de Jos University of Galati, C. D. Obreja, G. Popescu, L. Domnisoru, O. Ionas, F. Pacuraru, Experimental Investigation of the Bulbous Bow Form Influence on a Panamax Bulk Carrier Resistance, Proceedings of the Second International Congress on Mechanical and Electrical Engineering and Marine Industry MEEMI 2005, Vol. II, p , Varna, Bulgaria, October * * *, ITTC 1978 (performance prediction method). 7. * * *, ITTC 1957 (frictional resistance coefficient). 8. * * *, Free Pascal Programmers Guide,
Prediction of Resistance and Propulsion Power of Ships
Prediction of Resistance and Propulsion Power of Ships Technical University of Denmark Hans Otto Kristensen University of Southern Denmark Marie Lützen Project no. 2156, Emissionsbeslutningsstøttesystem
More information3. Resistance of a Ship 3.2 Estimates based on statistical methods
In the preliminary stages of ship design, the resistance coefficient is estimated with approximate methods based on systematic series or statistical regressions to experimental data. A systematic series
More informationExperimental and CFD Study of Wave Resistance of HighSpeed Round Bilge Catamaran Hull Forms
Experimental and FD Study of Wave Resistance of HighSpeed Round Bilge atamaran Hull Forms Prasanta K Sahoo, Australian Maritime ollege, Launceston/Australia, P.Sahoo@mte.amc.edu.au Nicholas A Browne,
More informationShip Resistance and Propulsion Prof. Dr. P. Krishnankutty Department of Ocean Engineering Indian Institute of Technology, Madras
Ship Resistance and Propulsion Prof. Dr. P. Krishnankutty Department of Ocean Engineering Indian Institute of Technology, Madras Lecture  10 Model Tests and Ship Resistance Prediction Method III Back
More informationE 490 Fundamentals of Engineering Review. Fluid Mechanics. M. A. Boles, PhD. Department of Mechanical & Aerospace Engineering
E 490 Fundamentals of Engineering Review Fluid Mechanics By M. A. Boles, PhD Department of Mechanical & Aerospace Engineering North Carolina State University Archimedes Principle and Buoyancy 1. A block
More informationSOME IMPORTANT NAVAL ARCHITECTURAL TERMS February 2009
Page 1(6) SOME IMPORTANT NAVAL ARCHITECTURAL TERMS February 2009 ITEM A, B and Cclass divisions EXPLANATION SOLAS has tables for structural fire protection requirement of bulkheads and decks. The requirements
More informationExperiment 3 Pipe Friction
EML 316L Experiment 3 Pipe Friction Laboratory Manual Mechanical and Materials Engineering Department College of Engineering FLORIDA INTERNATIONAL UNIVERSITY Nomenclature Symbol Description Unit A crosssectional
More informationCE 6303 MECHANICS OF FLUIDS L T P C QUESTION BANK PART  A
CE 6303 MECHANICS OF FLUIDS L T P C QUESTION BANK 3 0 0 3 UNIT I FLUID PROPERTIES AND FLUID STATICS PART  A 1. Define fluid and fluid mechanics. 2. Define real and ideal fluids. 3. Define mass density
More informationNatural Convection. Buoyancy force
Natural Convection In natural convection, the fluid motion occurs by natural means such as buoyancy. Since the fluid velocity associated with natural convection is relatively low, the heat transfer coefficient
More informationFLUID MECHANICS IM0235 DIFFERENTIAL EQUATIONS  CB0235 2014_1
COURSE CODE INTENSITY PREREQUISITE COREQUISITE CREDITS ACTUALIZATION DATE FLUID MECHANICS IM0235 3 LECTURE HOURS PER WEEK 48 HOURS CLASSROOM ON 16 WEEKS, 32 HOURS LABORATORY, 112 HOURS OF INDEPENDENT
More informationChapter 2 Selection of Main Dimensions and Calculation of Basic Ship Design Values
Chapter 2 Selection of Main Dimensions and Calculation of Basic Ship Design Values Abstract This chapter deals with the determination of the main ship dimensions (length, beam, draft, side depth), following
More informationResistance & Propulsion (1) MAR 2010. Presentation of ships wake
Resistance & Propulsion (1) MAR 2010 Presentation of ships wake Wake  Overview Flow around a propeller is affected by the presence of a hull Potential and viscous nature of the boundary layer contribute
More informationDISPLACEMENT TO SEMIDISPLACEMENT
Don t Get the Hump The name van Oossanen is a highly respected one in naval architectural circles. The firm s founder, Piet, devised the appendage that changed the face and location of the America s Cup
More informationExperiment (12): Major losses
Introduction: When a fluid is flowing through a pipe, it experiences some resistance due to which some of energy (head) of fluid is lost. Energy loss through friction in the length of pipeline is commonly
More informationCFD Analysis of Container Ship Sinkage, Trim and Resistance
CFD Analysis of Container Ship Sinkage, Trim and Resistance (abridged) Shaun Wortley B. Eng. Mechanical Engineering Project Report Department of Mechanical Engineering Curtin University 2013 21 Guillardon
More informationApplied Fluid Mechanics
Applied Fluid Mechanics Sixth Edition Robert L. Mott University of Dayton PEARSON Prentkv Pearson Education International CHAPTER 1 THE NATURE OF FLUIDS AND THE STUDY OF FLUID MECHANICS 1.1 The Big Picture
More informationLaminar and Turbulent flow. Flow Sensors. Reynolds Number. Thermal flow Sensor. Flow and Flow rate. R = Mass Flow controllers
Flow and Flow rate. Laminar and Turbulent flow Laminar flow: smooth, orderly and regular Mechanical sensors have inertia, which can integrate out small variations due to turbulence Turbulent flow: chaotic
More informationThese slides contain some notes, thoughts about what to study, and some practice problems. The answers to the problems are given in the last slide.
Fluid Mechanics FE Review Carrie (CJ) McClelland, P.E. cmcclell@mines.edu Fluid Mechanics FE Review These slides contain some notes, thoughts about what to study, and some practice problems. The answers
More informationPRINCIPLES OF NAVA L A R C H I T E C T U R E
PRINCIPLES OF NAVA L A R C H I T E C T U R E When it comes to selecting a boat, many prospective buyers have a difficult time understanding the parameters of yacht design and are oftentimes confused by
More informationNumerical and Experimental Study on the Wave Resistance of Fast Displacement Asymmetric Catamarans
Numerical and Experimental Study on the Wave Resistance of Fast Displacement Asymmetric Catamarans George Zaraphonitis, Dimitris Spanos, Apostolos Papanikolaou National Technical University of Athens,
More informationA CFD Investigation of Sailing Yacht Transom Sterns
A CFD Investigation of Sailing Yacht Transom Sterns Master s Thesis in the International Master s Programme Naval Architecture and Ocean Engineering JENS ALLROTH & TINGHUA WU Department of Shipping and
More informationPractice Problems on Boundary Layers. Answer(s): D = 107 N D = 152 N. C. Wassgren, Purdue University Page 1 of 17 Last Updated: 2010 Nov 22
BL_01 A thin flat plate 55 by 110 cm is immersed in a 6 m/s stream of SAE 10 oil at 20 C. Compute the total skin friction drag if the stream is parallel to (a) the long side and (b) the short side. D =
More informationOpen channel flow Basic principle
Open channel flow Basic principle INTRODUCTION Flow in rivers, irrigation canals, drainage ditches and aqueducts are some examples for open channel flow. These flows occur with a free surface and the pressure
More informationNCEES Fundamentals of Engineering (FE) Examination Review Fluid Mechanics, Hydraulics and Hydrologic Systems
NCEES Fundamentals of Engineering (FE) Examination Review Fluid Mechanics, Hydraulics and Hydrologic Systems Instructor: Dr. Marcio H. Giacomoni 1 Introduction The FE examination is an 8hour suppliedreference
More informationThe Effects of Length on the Powering of Large Slender Hull Forms
SUMMARY The Effects of Length on the Powering of Large Slender Hull Forms James Roy, Nigel Gee and Associates Ltd, UK Nigel Gee, Nigel Gee and Associates Ltd, UK For a constant deadweight, increasing ship
More informationFluid Mechanics Definitions
Definitions 91a1 Fluids Substances in either the liquid or gas phase Cannot support shear Density Mass per unit volume Specific Volume Specific Weight % " = lim g#m ( ' * = +g #V $0& #V ) Specific Gravity
More informationProblem 1. 12ft. Find: Velocity of truck for both drag situations. Equations: Drag F Weight. For force balance analysis: Lift and Drag: Solution:
Problem 1 Given: Truck traveling down 7% grade Width 10ft m 5 tons 50,000 lb Rolling resistance on concrete 1.% weight C 0.96 without air deflector C 0.70 with air deflector V 100 7 1ft Find: Velocity
More informationThe influence of ship operational parameters on fuel consumption
Scientific Journals Maritime University of Szczecin Zeszyty Naukowe Akademia Morska w Szczecinie 2013, 36(108) z. 1 pp. 2013, 36(108) z. 1 s. ISSN 17338670 The influence of ship operational parameters
More informationA Rescue Boat Design Utilizing Reused Plastic Bottles for Accident Preventation
Mechanical Engineering Research; Vol. 2, No. 1; 2012 ISSN 19270607 EISSN 19270615 Published by Canadian Center of Science and Education A Rescue Boat Design Utilizing Reused Plastic Bottles for Accident
More informationHigher Technological Institute Civil Engineering Department. Lectures of. Fluid Mechanics. Dr. Amir M. Mobasher
Higher Technological Institute Civil Engineering Department Lectures of Fluid Mechanics Dr. Amir M. Mobasher 1/14/2013 Fluid Mechanics Dr. Amir Mobasher Department of Civil Engineering Faculty of Engineering
More informationTopics. Romania Galati City "DUNAREA DE JOS" University of Galati Faculty of Naval Architecture EMShip 3 rd semester in Galati
FACULTY OF NAVAL ARCHITECTURE "DUNAREA DE JOS" UNIVERSITY OF GALATI 1 Topics Romania Galati City "DUNAREA DE JOS" University of Galati Faculty of Naval Architecture EMShip 3 rd semester in Galati 2 Romania
More informationFluid Mechanics: Static s Kinematics Dynamics Fluid
Fluid Mechanics: Fluid mechanics may be defined as that branch of engineering science that deals with the behavior of fluid under the condition of rest and motion Fluid mechanics may be divided into three
More informationOUTCOME 3 TUTORIAL 5 DIMENSIONAL ANALYSIS
Unit 41: Fluid Mechanics Unit code: T/601/1445 QCF Level: 4 Credit value: 15 OUTCOME 3 TUTORIAL 5 DIMENSIONAL ANALYSIS 3 Be able to determine the behavioural characteristics and parameters of real fluid
More informationCFD ANALYSIS OF CONTROLLABLE PITCH PROPELLER USED IN MARINE VEHICLE
CFD ANALYSIS OF CONROLLABLE PICH PROPELLER USED IN MARINE VEHICLE Aditya Kolakoti 1,.V.K.Bhanuprakash 2 & H.N.Das 3 1 M.E in Marine Engineering And Mechanical Handling, Dept of Marine Engineering, Andhra
More informationBackwater Rise and Drag Characteristics of Bridge Piers under Subcritical
European Water 36: 735, 11. 11 E.W. Publications Backwater Rise and Drag Characteristics of Bridge Piers under Subcritical Flow Conditions C.R. Suribabu *, R.M. Sabarish, R. Narasimhan and A.R. Chandhru
More informationCEE 370 Fall 2015. Laboratory #3 Open Channel Flow
CEE 70 Fall 015 Laboratory # Open Channel Flow Objective: The objective of this experiment is to measure the flow of fluid through open channels using a Vnotch weir and a hydraulic jump. Introduction:
More informationAn Experimental Study on Wind Loads Acting on a Trimaran PCC
J. Marine. Sci. Appl. (010) 9: 1118 DOI: 10.1007/s118040109068y An Experimental Study on Wind oads Acting on a Trimaran PCC Yasunori Nihei, Qiao i * and Yoshiho Ikeda Department of Marine System Engineering,
More informationCHLORINE CONCENTRATION DECAY IN THE WATER DISTRIBUTION SYSTEM OF A TOWN WITH INHABITANTS
U.P.B. Sci. Bull., Series D, Vol. 74, Iss. 1, 2012 ISSN 14542358 CHLORINE CONCENTRATION DECAY IN THE WATER DISTRIBUTION SYSTEM OF A TOWN WITH 50000 INHABITANTS AndreiMugur GEORGESCU 1, SandaCarmen GEORGESCU
More informationFLUID FLOW Introduction General Description
FLUID FLOW Introduction Fluid flow is an important part of many processes, including transporting materials from one point to another, mixing of materials, and chemical reactions. In this experiment, you
More informationGeneral Physics I Can Statements
General Physics I Can Statements Motion (Kinematics) 1. I can describe motion in terms of position (x), displacement (Δx), distance (d), speed (s), velocity (v), acceleration (a), and time (t). A. I can
More informationDetermination of the stability parameters and the position of a ship in the condition of flooding of the watertight compartment
Determination of the stability parameters and the position of a ship in the condition of flooding of the watertight compartment W. Mironiuk, A.Pawlqdzio & R. Wr6bel The Naval University of Gdynia, Poland
More informationPeter M. Arronax Consultants, Ltd. 1954 S. Quid Street, Captainee, MO 61057
Peter M. Arronax Consultants, Ltd. 1954 S. Quid Street, Captainee, MO 61057 To: Mr. J. A. Mesmason, Crew Chief Nautilus Salvage, Inc., 20000 Buena Vista Avenue, Vulcania, Hawaii 96807 From: J. Liu, T.
More informationShip Structure Committee Case Study. BULK CARRIERS: Design, Operation, and Maintenance Concerns for Structural Safety of Bulk Carriers
Member Agencies: American Bureau of Shipping Defence Research and Development Canada Maritime Administration Military Sealift Command Naval Sea Systems Command Society of Naval Architects & Marine Engineers
More informationTransactions on the Built Environment vol 11, 1995 WIT Press, ISSN
On the improvement of ship manoeuvring simulation in restricted waters by means of captive model test results M. Vantorre National Fundfor Scientific Research Department of Applied Mechanics, Naval Architecture,
More informationMECHANICAL ENGINEERING EXPERIMENTATION AND LABORATORY II EXPERIMENT 490.07 ENGINE PERFORMANCE TEST
MECHANICAL ENGINEERING EXPERIMENTATION AND LABORATORY II EXPERIMENT 490.07 ENGINE PERFORMANCE TEST 1. Objectives To determine the variation of the brake torque, brake mean effective pressure, brake power,
More informationAir Conditioning Laboratory Unit A660
Air Conditioning Laboratory Unit A660 Figure 1: A660 Base Unit shown with optional extra A661B fitted High accuracy wet and dry bulb sensors before and after each process to determine air condition. All
More informationBasic Principles of Ship Propulsion
Basic Principles of Ship Propulsion Contents Introduction...5 Scope of this Paper...5 Chapter 1...6 Ship Definitions and Hull Resistance...6 Ship types...6 A ship s load lines...6 Indication of a ship
More informationDimensional Analysis, hydraulic similitude and model investigation. Dr. Sanghamitra Kundu
Dimensional Analysis, hydraulic similitude and model investigation Dr. Sanghamitra Kundu Introduction Although many practical engineering problems involving fluid mechanics can be solved by using the equations
More informationGENERAL HULL FORM EQUATIONS
GENERAL HULL FORM EQUATIONS Displacement to Length Ratio Long Tons Displacement.01 LWL 3 LT.01 LWL 3 Prismatic Coefficient Cu. Ft. Displacement M idsection Area LWL A m LWL Block Coefficient Cu. Ft. Displacement
More informationDynamic Stability of Flared and Tumblehome Hull Forms in Waves
Dynamic Stability of Flared and Tumblehome Hull Forms in Waves Christopher Bassler, Seakeeping Division, Naval Surface Warfare Center, Carderock Division Andrew Peters, QinetiQ Bradley Campbell, Seakeeping
More informationFluid Mechanics Prof. T. I. Eldho Department of Civil Engineering Indian Institute of Technology, Bombay. Lecture No. # 36 Pipe Flow Systems
Fluid Mechanics Prof. T. I. Eldho Department of Civil Engineering Indian Institute of Technology, Bombay Lecture No. # 36 Pipe Flow Systems Welcome back to the video course on Fluid Mechanics. In today
More informationPractice Problems on Pumps. Answer(s): Q 2 = 1850 gpm H 2 = 41.7 ft W = 24.1 hp. C. Wassgren, Purdue University Page 1 of 16 Last Updated: 2010 Oct 29
_02 A centrifugal with a 12 in. diameter impeller requires a power input of 60 hp when the flowrate is 3200 gpm against a 60 ft head. The impeller is changed to one with a 10 in. diameter. Determine the
More informationCALCULATING WHEELOVER POINT
AsiaPacific Journal of Marine Science&Education, Vol. 2, No. 1, 2012, pp. 2746 CALCULATING WHEELOVER POINT Vladimir N. Drachev The article consists of two parts. The first one presents a ship turning
More informationProblem 5.25 (Adapted from Engineering Mechanics: Statics by Bedford & Fowler, Addison Wesley)
Problem 5.24 particle is traveling in a straight line in a horizontal plane. The mass of the particle is 0.10 kg. The acceleration of the particle is described by the following equation: dv 2 a= = Bt dt
More informationAPPLICATION OF RANS CFD CALCULATIONS TO THE DESIGN OF SAILBOAT HULLS
APPLICATION OF RANS CFD CALCULATIONS TO THE DESIGN OF SAILBOAT HULLS Philippe Pallu de la Barrière, Jérôme Védrenne Centre de Recherche pour l Architecture et l Industrie Nautiques (CRAIN) Introduction
More informationModule Title: General Ship Knowledge
CORK INSTITUTE OF TECHNOLOGY INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ Semester 1 FINAL Examinations 2009/10 School: National Maritime College of Ireland Programme Title: Bachelor of Science (Ordinary) in Nautical
More informationNUMERICAL SIMULATION OF REGULAR WAVES RUNUP OVER SLOPPING BEACH BY OPEN FOAM
NUMERICAL SIMULATION OF REGULAR WAVES RUNUP OVER SLOPPING BEACH BY OPEN FOAM Parviz Ghadimi 1*, Mohammad Ghandali 2, Mohammad Reza Ahmadi Balootaki 3 1*, 2, 3 Department of Marine Technology, Amirkabir
More informationINTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES. Requirements concerning LOAD LINE
INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES Requirements concerning LOAD LINE CONTENTS L1 Deleted L2 Intact stability  matter of class Rev.2 Apr 2013 L3 Intact stability of tankers during liquid
More information24 th ITTC Benchmark Study on Numerical Prediction of Damage Ship Stability in Waves Preliminary Analysis of Results
th ITTC Benchmark Study on Numerical Prediction of Damage Ship Stability in Waves Preliminary Analysis of Results Apostolos Papanikolaou & Dimitris Spanos National Technical University of Athens Ship
More informationVOYAGE OPTIMISATION: PREDICTION OF SHIP SPECIFIC FUEL CONSUMPTION FOR ENERGY EFFICIENT SHIPPING
VOYAGE OPTIMISATION: PREDICTION OF SHIP SPECIFIC FUEL CONSUMPTION FOR ENERGY EFFICIENT SHIPPING Ruihua LU *, Osman Turan, Evangelos Boulougouris Department of Naval Architecture and Marine Engineering,
More informationHANDLY & FREQUENTLY USED FORMULAS FOR THERMAL ENGINEERS
HANDLY & FREQUENTLY USED FORMULAS FOR THERMAL ENGINEERS GEOMETRY & MATH GEOMETRI & MATEMATIK Cylindrical (Tube) Volume V = p / 4 d 2 L [m 3 ] Cylindrical (Tube) Surface A = p d L [m 2 ] Rectangular Triangle
More informationAN ROINN OIDEACHAIS AGUS EOLAÍOCHTA LEAVING CERTIFICATE EXAMINATION, 2000
M31 AN ROINN OIDEACHAIS AGUS EOLAÍOCHTA LEAVING CERTIFICATE EXAMINATION, 2000 APPLIED MATHEMATICS  ORDINARY LEVEL FRIDAY, 23 JUNE  AFTERNOON, 2.00 to 4.30 Six questions to be answered. All questions
More informationSafety of Life at Sea, 1974 (SOLAS)
Safety of Life at Sea, 1974 (SOLAS) Prof. Manuel Ventura Ship Design I MSc in Marine Engineering and Naval Architecture Chap. III. Lifesaving Appliances and Arrangements 1 Cargo Ships Cargo Ships  Case
More informationAdvanced Propulsion System GEM 423E
Advanced Propulsion System GEM 423E Week12: Kappel Propellers Dr. Ali Can Takinacı Assosciate Professor in The Faculty of Naval Architecture and Ocean Engineering 34469 Maslak Istanbul Turkey Contents
More informationA MATTER OF STABILITY AND TRIM By Samuel Halpern
A MATTER OF STABILITY AND TRIM By Samuel Halpern INTRODUCTION This short paper deals with the location of Titanic s Center of Buoyancy (B), Center of Gravity (G) and Metacenter Height (M) on the night
More informationNUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES
Vol. XX 2012 No. 4 28 34 J. ŠIMIČEK O. HUBOVÁ NUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES Jozef ŠIMIČEK email: jozef.simicek@stuba.sk Research field: Statics and Dynamics Fluids mechanics
More informationHydraulics Laboratory Experiment Report
Hydraulics Laboratory Experiment Report Name: Ahmed Essam Mansour Section: "1", Monday 25 pm Title: Flow in open channel Date: 13 November2006 Objectives: Calculate the Chezy and Manning coefficients
More informationBasic Equations, Boundary Conditions and Dimensionless Parameters
Chapter 2 Basic Equations, Boundary Conditions and Dimensionless Parameters In the foregoing chapter, many basic concepts related to the present investigation and the associated literature survey were
More informationFundamentals of Fluid Mechanics
Sixth Edition. Fundamentals of Fluid Mechanics International Student Version BRUCE R. MUNSON DONALD F. YOUNG Department of Aerospace Engineering and Engineering Mechanics THEODORE H. OKIISHI Department
More informationFlow Measurement in Pipes and Ducts. Flow Measurement in Pipes and Ducts, Course #503. Presented by:
Flow Measurement in Pipes and Ducts, Course #503 Presented by: PDH Enterprises, LLC PO Box 942 Morrisville, NC 27560 www.pdhsite.com This course is about measurement of the flow rate of a fluid flowing
More informationDEVELOPMENT OF HIGH SPEED RESPONSE LAMINAR FLOW METER FOR AIR CONDITIONING
DEVELOPMENT OF HIGH SPEED RESPONSE LAMINAR FLOW METER FOR AIR CONDITIONING Toshiharu Kagawa 1, Yukako Saisu 2, Riki Nishimura 3 and Chongho Youn 4 ABSTRACT In this paper, we developed a new laminar flow
More informationMillikan Oil Drop Experiment Matthew Norton, Jurasits Christopher, Heyduck William, Nick Chumbley. Norton 0
Millikan Oil Drop Experiment Matthew Norton, Jurasits Christopher, Heyduck William, Nick Chumbley Norton 0 Norton 1 Abstract The charge of an electron can be experimentally measured by observing an oil
More informationFluids Quiz Science 8
Fluids Quiz Science 8 Introduction to Fluids 1. What are fluids essential for? Industrial Processes 2. What devices use knowledge of fluids? Hydraulic and pneumatic devices and machines A CloseUp Look
More informationFLow pattern around cable and its aerodynamic characteristics in critical Reynolds number range
The 22 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM 2) Seoul, Korea, August 263, 22 FLow pattern around cable and its aerodynamic characteristics in critical Reynolds
More informationSt. Petersburg State Polytechnic University Department of Internal combustion engines TECHNICAL REPORT SUMMARY Head of department Professor Galyshev
St. Petersburg State Polytechnic University Department of Internal combustion engines TECHNICAL REPORT SUMMARY Head of department Professor Galyshev Saint Petersburg, 2007 List of the executors: Shabanov,
More informationNUMERICAL AND EXPERIMENTAL ANALYSIS OF THE WIND FORCES ACTING ON LNG CARRIER
V European Conference on Computational Fluid Dynamics ECCOMAS CFD 1 J. C. F. Pereira and A. Sequeira (Eds) Lisbon, Portugal, 14 17 June 1 NUMERICAL AND EXPERIMENTAL ANALYSIS OF THE WIND FORCES ACTING ON
More informationHOW BOARDS AND RUDDERS WORK
HOW BOARDS AND RUDDERS WORK Lift theory By B. Kohler Copyright 2006 by B. Kohler Kdesigns HOW BOARDS & RUDDERS WORK Our boats become faster and faster and a better understanding of how a sail, rudder,
More informationOFFSHORE WIND Peter Robert
OFFSHORE WIND Peter Robert Business Development Manager Offshore Wind Damen Shipyards Group Phone: +31 (0)183 655177 Mobile: +31 (0)6 22856004 Email: peter.robert@damen.com ABOUT DAMEN FOUNDER: KOMMER
More informationBasic Principles in Microfluidics
Basic Principles in Microfluidics 1 Newton s Second Law for Fluidics Newton s 2 nd Law (F= ma) : Time rate of change of momentum of a system equal to net force acting on system!f = dp dt Sum of forces
More informationPressure drop in pipes...
Pressure drop in pipes... PRESSURE DROP CALCULATIONS Pressure drop or head loss, occurs in all piping systems because of elevation changes, turbulence caused by abrupt changes in direction, and friction
More informationFINE TM /Marine. CFD Suite for Marine Applications. Advanced Development for Better Products. www.numeca.com
FINE TM /Marine CFD Suite for Marine Applications Advanced Development for Better Products www.numeca.com FINE TM /Marine FINE /Marine is a unique integrated CFD software environment for the simulation
More informationHeat Transfer Prof. Dr. Ale Kumar Ghosal Department of Chemical Engineering Indian Institute of Technology, Guwahati
Heat Transfer Prof. Dr. Ale Kumar Ghosal Department of Chemical Engineering Indian Institute of Technology, Guwahati Module No. # 04 Convective Heat Transfer Lecture No. # 03 Heat Transfer Correlation
More informationTHE ROYAL INSTITUTION OF NAVAL ARCHITECTS
THE ROYAL INSTITUTION OF NAVAL ARCHITECTS APPLICATION OF OpenFOAM TO HULL FORM OPTIMISATION AT STX France S Cordier, L Morand, JM Roux, STX France S.A., Fr, and E Cortey, CFDNumerics, Fr SUMMARY After
More informationdu u U 0 U dy y b 0 b
BASIC CONCEPTS/DEFINITIONS OF FLUID MECHANICS (by Marios M. Fyrillas) 1. Density (πυκνότητα) Symbol: 3 Units of measure: kg / m Equation: m ( m mass, V volume) V. Pressure (πίεση) Alternative definition:
More informationGlossary of Physics Formulas
Glossary of Physics Formulas 1. Kinematic relations in 1D at constant velocity Mechanics, velocity, position x  x o = v (t t o ) or x  x o = v t x o is the position at time = t o (this is the beginning
More informationExperimental Uncertainties (Errors)
Experimental Uncertainties (Errors) Sources of Experimental Uncertainties (Experimental Errors): All measurements are subject to some uncertainty as a wide range of errors and inaccuracies can and do happen.
More informationPhysics 123 Fluid Mechanics Review
Physics 123 Fluid Mechanics Review I. Definitions & Facts Density Specific gravity (= D material / D water ) Pressure Atmosphere, bar, Pascal Streamline, laminar flow Gauge pressure Turbulence Density
More informationNumerical Analysis of Transient Phenomena in Electromagnetic Forming Processes
Volume 49, Number 3, 8 359 Numerical Analysis of Transient Phenomena in Electromagnetic Forming Processes Sorin PASCA, Tiberiu VESSELENYI, Virgiliu FIRETEANU Pavel MUDURA, Tiberiu TUDORACHE, Marin TOMSE
More informationAbaqus/CFD Sample Problems. Abaqus 6.10
Abaqus/CFD Sample Problems Abaqus 6.10 Contents 1. Oscillatory Laminar Plane Poiseuille Flow 2. Flow in Shear Driven Cavities 3. Buoyancy Driven Flow in Cavities 4. Turbulent Flow in a Rectangular Channel
More informationCalculating resistance to flow in open channels
Alternative Hydraulics Paper 2, 5 April 2010 Calculating resistance to flow in open channels http://johndfenton.com/alternativehydraulics.html johndfenton@gmail.com Abstract The DarcyWeisbach formulation
More informationDimensional analysis is a method for reducing the number and complexity of experimental variables that affect a given physical phenomena.
Dimensional Analysis and Similarity Dimensional analysis is very useful for planning, presentation, and interpretation of experimental data. As discussed previously, most practical fluid mechanics problems
More informationUsing CFD to improve the design of a circulating water channel
27 December 27 Using CFD to improve the design of a circulating water channel M.G. Pullinger and J.E. Sargison School of Engineering University of Tasmania, Hobart, TAS, 71 AUSTRALIA Abstract Computational
More informationFlow Over Weirs. By John Fuller. Fluid Mechanics Lab. Wednesday(1345pm) Group member: Abdur Rahaman
Flow Over Weirs By John Fuller Fluid Mechanics Lab Wednesday(1345pm) Group member: Abdur Rahaman Abstract The objective of this lab is to determine the characteristics of openchannel flow over, firstly,
More informationPipe FlowFriction Factor Calculations with Excel
Pipe FlowFriction Factor Calculations with Excel Course No: C03022 Credit: 3 PDH Harlan H. Bengtson, PhD, P.E. Continuing Education and Development, Inc. 9 Greyridge Farm Court Stony Point, NY 10980
More informationMechanics 2. Revision Notes
Mechanics 2 Revision Notes November 2012 Contents 1 Kinematics 3 Constant acceleration in a vertical plane... 3 Variable acceleration... 5 Using vectors... 6 2 Centres of mass 8 Centre of mass of n particles...
More informationHEAT TRANSFER ANALYSIS IN A 3D SQUARE CHANNEL LAMINAR FLOW WITH USING BAFFLES 1 Vikram Bishnoi
HEAT TRANSFER ANALYSIS IN A 3D SQUARE CHANNEL LAMINAR FLOW WITH USING BAFFLES 1 Vikram Bishnoi 2 Rajesh Dudi 1 Scholar and 2 Assistant Professor,Department of Mechanical Engineering, OITM, Hisar (Haryana)
More informationL r = L m /L p. L r = L p /L m
NOTE: In the set of lectures 19/20 I defined the length ratio as L r = L m /L p The textbook by Finnermore & Franzini defines it as L r = L p /L m To avoid confusion let's keep the textbook definition,
More informationExperiment: Viscosity Measurement B
Experiment: Viscosity Measurement B The Falling Ball Viscometer Purpose The purpose of this experiment is to measure the viscosity of an unknown polydimethylsiloxiane (PDMS) solution with a falling ball
More informationTheoretical and Experimental Investigation of Heat Transfer Characteristics through a Rectangular Microchannel Heat Sink
Theoretical and Experimental Investigation of Heat Transfer Characteristics through a Rectangular Microchannel Heat Sink Dr. B. S. Gawali 1, V. B. Swami 2, S. D. Thakre 3 Professor Dr., Department of Mechanical
More informationPractice Problems on Viscosity. free surface. water. y x. Answer(s): base: free surface: 0
viscosity_01 Determine the magnitude and direction of the shear stress that the water applies: a. to the base b. to the free surface free surface U y x h u water u U y y 2 h h 2 2U base: yx y 0 h free
More information