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在封闭光学玻璃箱体内,应用介质阻挡放电等离子体对20°顶角圆锥附近静止大气进行了定常和脉冲循环控制,对等离子体诱导的圆锥截面绕流速度场进行了二维PIV测量,对定常控制和脉冲循环控制下最大绕流速度及最大轴向涡量进行了比较分析。并对不同的电压和频率值对上述参数影响进行了研究。实验结果表明:相对于定常控制模式,脉冲循环控制下沿垂直于圆锥截面对称面径线分布的时间平均切向速度和轴向涡量范围要广;在脉冲循环控制控制下,动量传递的主要表现在离散涡的形成而不是气流的加速。
In a closed optical glass box, the stationary atmospheric and pulsatile circulation control of the stationary atmosphere near the 20 ° apex conical was carried out by dielectric barrier discharge plasma. Two-dimensional PIV measurements of the plasma-induced conical section flow velocity field were carried out. Under the control and pulse cycle control, the maximum flow velocity and the maximum axial vorticity are compared and analyzed. The effects of different voltage and frequency values on these parameters were studied. The experimental results show that the time-average tangential velocity and axial vorticity range under the pulse cycle control is perpendicular to the symmetry plane line of the conical section under pulse-controlled cyclic control. Under the control of pulse cycle control, the main momentum transfer It is manifested in the formation of discrete vortices rather than the acceleration of airflow.