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Impact of dielectric barrier discharge plasma on the wake of a wind turbine blade section oscillating in plunge

Maleki, G. H ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1177/09576509211033700
  3. Publisher: SAGE Publications Ltd , 2022
  4. Abstract:
  5. Effects of dielectric barrier discharge plasma have been studied on the wake velocity profiles of a section of a 660 kW wind turbine blade in plunging motion in a wind tunnel. The corresponding unsteady velocity profiles show remarkable improvement when the plasma actuators were operating and the angles of attack of the model were beyond the static stall angles of the airfoil. As a result the drag force was considerably reduced. It is further observed that the plasma-induced flow attenuates the leading edge vortices that are periodically shed into wake and diminishes the large eddies downstream. The favorable effects of the plasma augmentation are shown to occur near the uppermost and lowermost positions of the plunging paths where the wake is primarily dominated by the vortices of the same sign. The wake structure in the presence of the flow induced by the plasma actuators shows that the actual effective angles of attack seen by the plunging airfoil reduces in comparison with that for the case of the plasma augmentation off situation. © IMechE 2021
  6. Keywords:
  7. Dielectric Barrier Discharge ; Leading edge vortex ; Plasma ; Plunging ; Vortex shedding ; Vorticity ; Wake ; Wind turbine blade ; Actuators ; Airfoils ; Angle of attack ; Dielectric devices ; Dielectric materials ; Drag ; Electric discharges ; Flow control ; Plasma theory ; Turbine components ; Vortex flow ; Wakes ; Wind tunnels ; Wind turbines ; Angles of attack ; Dielectric barrier discharge plasmas ; Leading-edge vortices ; Plasma actuator ; Plunging airfoil ; Velocity profiles ; Wake structures ; Wind turbine blades ; Turbomachine blades
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy ; Volume 236, Issue 2 , 2022 , Pages 320-335 ; 09576509 (ISSN)
  9. URL: https://journals.sagepub.com/doi/abs/10.1177/09576509211033700?journalCode=piac