IEEE Joint CS/RA/SMC Chapter Technical Meeting "Dynamic Modeling of Vortex Induced Vibration Wind Turbines"

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Title: Dynamic Modeling of Vortex Induced Vibration Wind Turbines

Abstract: Bladeless Wind Turbines (BWT) present a new idea in energy generation. These bladeless turbines work to achieve essentially the same thing as traditional turbines: To turn the wind into kinetic energy that can be harvested to generate electricity. However, instead of a propeller, these structures use a pattern of vortices (spinning wind) in order to capture the breeze. In this presentation we talk about dynamic modeling of four configurations of vortex-induced vibrations of bladeless wind turbines. The BWTs consist of a bluff body mounted on a flexible structure in the flow field. The shape of the bluff body and its mounting structure are different among the proposed BWTs. The Euler-Bernoulli beam theory and the Galerkin procedure are used to derive a nonlinear distributed-parameter model for the BWTs under a fluctuating lift force due to periodically shedding vortices. The derived dynamic model is validated through comparison with a 3D CFD-FEM numerical simulation. The effects of the wind speed on the induced lift force, turbine deflection, and generated power of four BWTs are investigated. It is verified that the amplitude of the vibrations of the BWT increases significantly when the vortex shedding is synchronized with the structural oscillations. The results show that, while conic BWTs have a higher performance at post-synchronization region (i.e. high wind speeds), the circular cylinder BWTs exhibit a better performance at pre-synchronization region (i.e. low wind speeds).



  Date and Time

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  • The University of British Columbia
  • 2356 Main Mall
  • Vancouver, British Columbia
  • Canada V6T1Z4
  • Building: MacLeod
  • Room Number: 418

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  Speakers

Professor Mohammad Eghtesad of Shiraz University, Iran

Biography:

Dr. Mohammad Eghtesad received his B.Sc. from University of Tehran (1983), M.Sc. from University of Tehran (1987) and Ph.D. from University of Ottawa (1996). He joined the School of Mechanical Engineering at Shiraz University in 1997 where he is currently a full Professor. He has taught and done research in the area of robotics, mechatronics and control. His research includes both theoretical and experimental studies. Since 2012 he is the editor-in-chief of Iranian Journal of Science and Technology, Transactions of Mechanical Engineering.

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