Numerical simulations are conducted to investigate two steering strategies using ns-DBD plasma actuators for a wedge body in supersonic flows. The first strategy considers only a single actuator operating at several pulsing frequencies, whereas the second one involves two actuators but operating at half the pulsing frequency of one of the single-actuator configuration. The idea is to assess whether the second strategy is able to provide a similar steering efficacy under the same total energy input. Results show that the single-actuator configuration has to operate with a pulsing frequencies comparable to or higher than the flow frequency in order to generate a decent magnitude of steering moment. On the other hand, the two-actuator strategy appears to be more pragmatic because it can produce magnitude of steering moment comparable to the reference single-actuator configuration, while mitigating the demanding requirement on the plasma generator circuitry and the drastic rise in fluid temperature near the actuator.

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Strategies for Supersonic Flow Control Using ns-DBD Plasma Actuators

  • J. H. Ng,
  • Y. D. Cui,
  • B. C. Khoo

摘要

Numerical simulations are conducted to investigate two steering strategies using ns-DBD plasma actuators for a wedge body in supersonic flows. The first strategy considers only a single actuator operating at several pulsing frequencies, whereas the second one involves two actuators but operating at half the pulsing frequency of one of the single-actuator configuration. The idea is to assess whether the second strategy is able to provide a similar steering efficacy under the same total energy input. Results show that the single-actuator configuration has to operate with a pulsing frequencies comparable to or higher than the flow frequency in order to generate a decent magnitude of steering moment. On the other hand, the two-actuator strategy appears to be more pragmatic because it can produce magnitude of steering moment comparable to the reference single-actuator configuration, while mitigating the demanding requirement on the plasma generator circuitry and the drastic rise in fluid temperature near the actuator.