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We have investigated the effectiveness of the proposed strategy for controlling transitions by periodic body forcing. The control strategy estimates the effective burst frequency ( \(F^{+}\) ) based on the positional relationship between the transition point in the uncontrolled flow and the plasma actuator. In the case of the uncontrolled flow around an NACA0015 airfoil at \(\alpha = 16\) in \(Re = 63,000\) , the effective \(F^{+}\) was estimated to be 20 if the plasma actuator has been installed at 5% from the leading edge. The flow control effect of the control strategy was verified by conducting LESs with these conditions. The results showed that the control strategy can control the transition effectively.

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Transition Control for Separated Flow over Airfoil by Periodic Body Forcing

  • 会议论文

  • 发表日期：

    2026年

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  • Takuto Ogawa,
  • Aiko Yakeno,
  • Kozo Fujii

摘要

We have investigated the effectiveness of the proposed strategy for controlling transitions by periodic body forcing. The control strategy estimates the effective burst frequency ( \(F^{+}\) ) based on the positional relationship between the transition point in the uncontrolled flow and the plasma actuator. In the case of the uncontrolled flow around an NACA0015 airfoil at \(\alpha = 16\) in \(Re = 63,000\) , the effective \(F^{+}\) was estimated to be 20 if the plasma actuator has been installed at 5% from the leading edge. The flow control effect of the control strategy was verified by conducting LESs with these conditions. The results showed that the control strategy can control the transition effectively.