A note on supersonic flow control with nanosecond plasma actuator

作者：Zheng, J. G.; Cui, Y. D.; Li, J.; Khoo, B. C.^*

来源：Physics of Fluids, 2018, 30(4): 040907.

DOI：10.1063/1.5012054

• SEPARATION CONTROL
• DISCHARGE

A concept study on supersonic flow control using nanosecond pulsed plasma actuator is conducted by means of numerical simulation. The nanosecond plasma discharge is characterized by the generation of a micro-shock wave in ambient air and a residual heat in the discharge volume arising from the rapid heating of near-surface gas by the quick discharge. The residual heat has been found to be essential for the flow separation control over aerodynamic bodies like airfoil and backward-facing step. In this study, novel experiment is designed to utilize the other flow feature from discharge, i.e., instant shock wave, to control supersonic flow through shock-shock interaction. Both bow shock in front of a blunt body and attached shock anchored at the tip of supersonic projectile are manipulated via the discharged-induced shock wave in an appropriate manner. It is observed that drag on the blunt body is reduced appreciably. Meanwhile, a lateral force on sharp-edged projectile is produced, which can steer the body and give it an effective angle of attack. This opens a promising possibility for extending the applicability of this flow control technique in supersonic flow regime. Published by AIP Publishing.

• 出版日期2018-4
• 单位华中科技大学