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为揭示等离子体气动激励诱导气流加速的作用机理及影响因素,对静止空气条件下的诱导气流速度进行了测量.实验结果表明:等离子体气动激励启动瞬间形成启动涡,随即旋涡向下游运动并最终演化为近壁面射流;激励电压增大时,诱导气流速度增大,近壁面射流的射程增加;激励频率增大时,诱导气流速度变化不明显;多组电极激励器诱导的气流速度周期性地先增大后减小,并且诱导气流加速的效果沿流向方向逐渐减弱.
In order to reveal the action mechanism and influencing factors of aerodynamic acceleration induced gas flow acceleration, the induced gas velocity under static air condition was measured.The experimental results show that the starting vortex forms when plasma pneumatically actuated, then the vortex moves downstream and finally Evolved into a near-wall jet. When the excitation voltage is increased, the induced airflow velocity increases and the jet range of the near-wall jet increases. When the excitation frequency increases, the induced airflow velocity does not change obviously. The airflow velocity induced by multiple electrode actuators periodically First increase and then decrease, and the effect of inducing airflow acceleration along the flow direction gradually weakened.