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Numerical Investigation of Plasma Actuator Effects on the Performance and Self-starting Improvement of Darrieus Type Wind Turbine

Zare Chavoshi, Majid | 2024

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 57547 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Ebrahimi, Abbas
  7. Abstract:
  8. Although the popularity of Darrieus-type vertical axis wind turbines is growing for small-scale electricity generation, these turbines have severe challenges in self-starting. This research study use the plasma actuator flow control method to solve the self-starting problem besides enhancing the turbine performance. The Darrieus turbine is numerically investigated using a pressure-based finite volume method to solve the unsteady Reynolds-averaged Navier-Stokes (URANS). Simulation of the blade rotation is performed using the sliding mesh technique accompanied by the turbine equation of motion to enable the blade rotational degree of freedom. The results in plasma off condition show that the contribution of connection point moment in local torque generation of the blade is more than 50 percent. Furthermore, negative torque generation for tip speed ratios lower than 1.5, known as the origin of turbine self-starting challenges. The plasma actuator reduces the negative torque generation and enhances the turbine power production by up to 260% at the tip speed ratio range of 1.5 to 2.0. Furthermore, the plasma actuator improves the self-starting of the turbine such that the tip speed ratio increment time from 1.5 to 5.0 reduced up to 30% reducing the total time of turbine self-starting
  9. Keywords:
  10. Vertical Axis Wind Turbine ; H-Type Vertical Axis Wind Turbine ; Darrieus Turbine ; Dynamic Stall ; Plasma Actuator ; Self Starting ; Unsteady Reynolds-Averaged Navier-Stokes Equations (URANS)

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