Simulation im Bereich der Windenergie ein Überblick. Dipl.-Ing. (FH) Nathalie Mattwich, CADFEM GmbH Dipl.-Phys. oec Stephan Hecht, ANSYS Germany GmbH

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1 Simulation im Bereich der Windenergie ein Überblick Dipl.-Ing. (FH) Nathalie Mattwich, CADFEM GmbH Dipl.-Phys. oec Stephan Hecht, ANSYS Germany GmbH

2 Agenda Uhrzeit Thema Referent 16:00 16:30 Simulation im Bereich der Windenergie ein Überblick 16:30 17:00 Wirbelstromverlust- und Temperaturberechnung für einen permanenterregten Windkraftgenerator 17:00 17:30 Integrierte Gesamtsimulation von Offshore Windenergieanlagen 17:30 18:00 Windkraftanlagen mit Vertikalachse Entwicklung und Optimierung mit CFD N. Mattwich, CADFEM S. Hecht, ANSYS N. Götschmann, Lloyd Dynamowerke GmbH & Co. KG D. Kaufer, Universität Stuttgart B. Hanna, CFD Consultants GmbH - 1 / 22 -

3 ANSYS Simulation Software Clearly a System Full of Innovation Dynamic Operating Conditions High Cost of Failure Medium sized and relatively young companies - 2 / 22 -

4 ANSYS Simulation Software From Single Part to System Simulation System Simulation Power Electronics Control Loops Coupled Physics Reduced Models Coupled Physics on Component Level Multiphysics Automated Load Transfer Direct and Sequential coupling Single Physics on Component Level Structural Mechanics Fluid Dynamics Thermal Analysis Electromagnetics - 3 / 22 -

5 Structural Analysis Fatigue analysis Composite modeling Courtesy of SKF GmbH Non-linear material and contact modelling Non-linear stability analysis - 4 / 22 -

6 Challenges in Composite Structural Laminate & Sandwich Free form surface from aerodynamics Multiple material systems involved Complex layup with huge amount of plies Arbitrary fiber orientation Ply and sandwich failure - 5 / 22 -

7 Customer Feedback in ANSYS Composite PrepPost - 6 / 22 -

8 Fatigue Assessment using ANSYS ncode Designlife Integration into the Workbench environment Load channel information and material data is passed from Mechanical to ncode - 7 / 22 -

9 Fatigue Assessment using ANSYS ncode Designlife Typical ncode Workflow - 8 / 22 -

10 Wind Turbine Positioning Tower Crane dimensioning Transportation of Spar Truss on Heavy Lift Vessel Advanced Modeling of soil structure - strength driven problems in rock and soil (stability, failure) Courtesy of Technip Offshore Finland Courtesy of Liebherr, Ehingen - 9 / 22 -

11 Offshore Turbines Challenges Designing substructure under combined loads of wind, current, and waves Proving compliance with established codes Photo Tore Johannesen. Benefits of CAE Gaining a clear understanding of all loads experienced by substructure Including coupling to Flex5 standard tools Built-in code checking - 10 / 22 -

12 Acoustic Simulation Hydro-Acoustic Simulation of a Hydraulic MENCK Hammer Reduce of gear box and brake noises Noise emission between blade and tower - 11 / 22 -

13 Fluid Dynamics Aerodynamic analysis of a wind turbine blade Site Selection Cooling analysis of an electric maschine Courtesy of GAMESA - 12 / 22 -

14 Aerodynamic Blade Design Challenges Design of 2D profiles 3D blades Advanced turbulence modeling: Flow separations Laminar to turbulent transition Roughness effects Tip vortices Scale resolving simulation (LES, SAS ) Interaction with upstream turbines Design studies & optimization Photo José Luis Gutiérrez, graphic courtesy of IMPSA S.A., Argentina - 13 / 22 -

15 Nacelle / Tower Base Cooling Challenges Ensure effective cooling under all environmental conditions Complex geometries & many details Many parameters: Fan positions & number Positions of electrical devices Outside temperature & incoming sun radiation Courtesy of GAMESA Benefits of simulations Virtual prototyping of different cooling solutions Less trial & error Reduce thermal peak loads on generator, gear, transformer, etc. Pre-identify problem regions - 14 / 22 -

16 Wind Park Design & Site Selection Challenges Steep terrain, mountains, forests Predict wind behavior & turbulences Varying wind directions and speeds Benefits of simulations Power estimates Optimize turbine placement Wind speed & turbulence prediction over complex terrain - 15 / 22 -

17 Example: Wind Farm & Multiple Wakes Wind speed at hub height, wind direction 210º Without wind turbines With wind turbines - 16 / 22 -

18 Electromagnetic Analysis Electromagentic analysis of a sensor Electromagentic analysis of cables Simulation of a rotating electrical machines Automated and efficient machine design workflow - 17 / 22 -

19 Improvement of efficiency of el. Machines Smaller stray magnetic field Better area guidance Less Loss Less iron loss Less copper loss Less Eddy currents High quality material - 18 / 22 -

20 ANSYS Simulation Software Coupled Field Analysis on Component Level Structural deformation of a coil due to magnetic and thermal loads Temperatures in a stator of an electric machine - 19 / 22 -

21 ANSYS Simulation Software ANSYS Workbench R13 Interface Maxwell B-Field, Losses Ansys Thermal Temperature EM Loss Temperature - 20 / 22 -

22 ANSYS Simulation Software System Simulation of an Entire Wind Turbine Mechanical Solution Reduced Order Models System Response Electrical Solution Turbine Blades Gear Box Electric Generator Power Electronics - 21 / 22 -

23 Conclusion Analysis of wind energy system is multilevel Require: in-depth analysis of single components Wind energy system is multi-domain Interactions between subsystems of different physical domain, electrical, mechanical, thermal, fluid dynamic Analysis of system interactions - 22 / 22 -