等离子体合成射流激励器的流场特性分析

等离子体合成射流作为一种新型的主动流动控制技术,是针对传统合成射流激励强度差而设计的。利用Fluent 6.3软件,采用结构化网格,对等离子体合成射流激励器流场进行了二维非定常数值模拟,研究单次放电激励器流场的演化规律,并且比较了不同放电时间尺度对激励器出口速度的影响。研究表明:等离子体合成射流激励器能够产生高速射流,最大速度达到439 m／s,大大增加了流场湍流度;激励器放电时间越长,出口峰值速度越大。计算结果表明等离子合成射流激励器能够应用于高速流动控制。

Investigation on Flow Filed of the Plasma Synthetic Jet Device

As a new type of active control technology, plasma synthetic jet (PSJ) is designed to object the poor robustness of traditional synthetic jet technology. The software is Fluent6.3 and the grids for numerical simulation are structure. The flow field surrounding the PSJ device was simulated numerically to get the evolution regularity of the flow field. The affection on the velocity of the device exit was compared between different discharge durations. The results show that the PSJ device can generate high speed jet which enlarges the instability of flow. The high velocity 439m/s is achieved. It is also suggested that the longer the discharge duration, the higher the speed of the device exit. And it can be used for high speed flow control.