等离子体气动激励的诱导气流速度的实验研究(英文)

等离子体流动控制是基于等离子体气动激励的主动流动控制,可用于改善飞行器和动力装置空气动力特性.为了探索等离子体流动控制的内在机理,在不同的参数条件下,对等离子体气动激励的诱导气流速度进行了实验研究.实验结果表明:等离子体气动激励可以把激励器表面空气加速到每秒几米的速度,诱导气流与激励器表面有一个约5°的夹角,且气流经加速后会形成漩涡结构.固定激励频率,诱导气流速度随激励电压增大而增大;固定激励电压,诱导气流速度受激励频率的影响不大;激励器布局对等离子体气动激励器的性能有重要影响.

EXPERIMENTAL INVESTIGATION ON INDUCED FLOW VELOCITY OF PLASMA AERODYNAMIC ACTUATION

Plasma flow control is an active flow control technology that based on the plasma aerodynamic actuation. It can be used to enhance the aerodynamic characteristics of aircraft and propulsion systems. To study the phenomena occurring in plasma aerodynamic actuation and the mechanism of plasma flow control, the induced flow velocity of the plasma aerodynamic actuator is experimentally investigated under a variety of parameter conditions. The results indicate that plasma aerodynamic actuation accelerates the near surface air at velocities of a few meters per second, and there is an angle about 5° between the mainstream and the actuator wall and a spiral vortex is formed when the induced flow is moving along the wall. Besides, with the fixed frequency, the induced flow velocity increases linearly with the applied voltage, but it is insensitive to the frequency when the applied voltage is fixed. And the configuration is an effective factor for the performance of the plasma aerodynamic actuator.