电激励因素影响合成射流的实验研究

Experimental investigation of the effects of electrical forcing factors on synthetic jets

设计了合成射流双膜激励器及实验测试系统。采用热线风速仪对激励器出口下游不同点的速度进行测量并分析合成射流的发展演化,对电激励因素即激励电压幅值、频率及信号波形对合成射流的影响进行试验和分析,对激励器在不同激励频率下启动工作时合成射流的响应及建立时间进行了考察。

The actuators with dual-membrane and the experimental system have been set up. The actuator is excited with sine, square, triangle and burst wavefonn, and the time-dependent velocity is measured with a hot-wire anemometer over a wide range of spatial locations, forcing voltages and frequencies. The evolution of synthetic jet and the effects of electrical forcing factors on synthetic jets are summarized. The synthetic jet responding time is measured when the actuator is excited at different forcing frequencies.