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The mechanisms of both dielectric barrier discharge plasma actuators (DBD-PA) under burst mode and synthetic jet (SJ) actuators for flow separation control over an airfoil have been clarified through a series of studies with high-fidelity flow simulations. For flows with relatively low Reynolds numbers, the presence of small coherent spanwise vortices induced by intermittent actuations was found to be a crucial factor for effective flow control with both devices. It should be noted that during the transition from separated to attached flows, small coherent spanwise vortices appeared aligned over the airfoil surface for a certain period of time. This article summarises the results in Phys. Fluids 35, 065114 (2023) and Actuators 12(8), 322 (2023).

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On the Role of the Spanwise Vortices Aligned Over an Airfoil Surface for the Flow Control

  • 会议论文

  • 发表日期：

    2025年

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  • Kozo Fujii,
  • Yoshiaki Abe,
  • Takuto Ogawa

摘要

The mechanisms of both dielectric barrier discharge plasma actuators (DBD-PA) under burst mode and synthetic jet (SJ) actuators for flow separation control over an airfoil have been clarified through a series of studies with high-fidelity flow simulations. For flows with relatively low Reynolds numbers, the presence of small coherent spanwise vortices induced by intermittent actuations was found to be a crucial factor for effective flow control with both devices. It should be noted that during the transition from separated to attached flows, small coherent spanwise vortices appeared aligned over the airfoil surface for a certain period of time. This article summarises the results in Phys. Fluids 35, 065114 (2023) and Actuators 12(8), 322 (2023).