3D Fluid-Structure Interaction and Fatigue Damage Simulation of Wind Turbine Structures
Event details
| Date | 10.02.2016 |
| Hour | 09:00 › 10:00 |
| Speaker | Dr. Xiaowei Deng, Department of Structural Engineering, University of California, San Diego |
| Location | |
| Category | Conferences - Seminars |
Wind energy, as an alternative to fossil fuels, is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation. Wind turbines, converting mechanical energy to electricity, must extract as much wind energy from air flow as possible while resisting huge forces and deformations over a lifespan of 20 years. The size of wind turbine has been steadily increasing over the past few years with the limit of blade length expanding from 30 meters to 80 meters. Therefore the design challenge of large wind turbines is to balance aerodynamic performance and structural integrity. The primary goal of this project is to develop a high-fidelity simulation techniques that are capable of modeling the interaction of full scale wind turbine structures with air flow and ocean water and capture the fatigue behaviors of the large wind turbine blade under millions of loading cycles over the long life span.
Full-scale wind turbine structure is modeled with Kirchhoff-Love shell and rotaion-free beam using isogeometric analysis. Residual based variational multiscale simulations (RBVMS) combined with the techniques of enforcement of weak boundary conditions and track of non-matching meshes have been applied to the problem of wind and turbine interaction for high Reynolds number aerodynamics. With the assistance of level set method, the free-surface flow is modeled by two-phase Navier-Stokes equations, which enables the simulations of the interaction between the free-surface ocean waves and floating wind turbines. A framework of fatigue damage model based on continuum damage mechanics and residual stiffness approach and driven by the dynamic data application system (DDDAS) was established, aiming at simulating high-cycle fatigue of wind turbine composite blades. The final results indicate accurate prediction of the damage zone formation, damage progression, and eventual failure of the composite turbine blade.
Bio: Xiaowei Deng is a Postdoc in the Department of Structural Engineering, University of California, San Diego. He is currently working on fluid-structure interaction (FSI) analysis and fatigue damage modeling of composite structures. He held a M.S. in Civil Engineering from Tsinghua University. He started the Pd.D. program from University of Cambridge and then transferred to California Institute of Technology to complete the Ph.D. in Aerospace Engineering. During the Ph.D. studies, he mainly worked on deployable lightweight structures with a focus of a NASA project, deployment of super-pressure balloons up to 128-m diameter. He received the William F. Ballhaus Prize for outstanding PhD dissertation, and two best paper awards from ASME and AIAA respectively.
Full-scale wind turbine structure is modeled with Kirchhoff-Love shell and rotaion-free beam using isogeometric analysis. Residual based variational multiscale simulations (RBVMS) combined with the techniques of enforcement of weak boundary conditions and track of non-matching meshes have been applied to the problem of wind and turbine interaction for high Reynolds number aerodynamics. With the assistance of level set method, the free-surface flow is modeled by two-phase Navier-Stokes equations, which enables the simulations of the interaction between the free-surface ocean waves and floating wind turbines. A framework of fatigue damage model based on continuum damage mechanics and residual stiffness approach and driven by the dynamic data application system (DDDAS) was established, aiming at simulating high-cycle fatigue of wind turbine composite blades. The final results indicate accurate prediction of the damage zone formation, damage progression, and eventual failure of the composite turbine blade.
Bio: Xiaowei Deng is a Postdoc in the Department of Structural Engineering, University of California, San Diego. He is currently working on fluid-structure interaction (FSI) analysis and fatigue damage modeling of composite structures. He held a M.S. in Civil Engineering from Tsinghua University. He started the Pd.D. program from University of Cambridge and then transferred to California Institute of Technology to complete the Ph.D. in Aerospace Engineering. During the Ph.D. studies, he mainly worked on deployable lightweight structures with a focus of a NASA project, deployment of super-pressure balloons up to 128-m diameter. He received the William F. Ballhaus Prize for outstanding PhD dissertation, and two best paper awards from ASME and AIAA respectively.
Practical information
- Informed public
- Free
- This event is internal
Organizer
- IGM
Contact
- Prof J. Botsis