等离子体对翼型流动分离控制历程的PIV试验研究

PIV measurement on airfoil flow separation control course by plasma actuation

采用粒子图像测速(Particle Image Velocimetry,PIV)技术,研究了介质阻挡放电等离子体激励对NA-CA0015翼型表面流动分离的控制特性及控制效果随时间历程的变化规律。结果表明,激励电压存在一个阈值,当电压小于阈值时,控制无效或效果不明显;当电压接近阈值时,控制表现出不稳定性并最终趋于稳定;当电压大于阈值时,控制效果稳定且显著,气流能够很好地重附在翼型表面。

Particle Image Veloeimetry （PIV） technology was applied to investigate the flow separation control around the NACA0015 airfoil by dielectric harrier discharge （DBD） plasma actuator. The wind tunnel test was carried out to investigate the forcing voltage and the character of flow separation control effect changing with time. The results showed that there was threshold value of actuator voltage. When the voltage was lower than the threshold value, the control was effectless or the control was not visible. When the voltage was near the threshold value, the control effect was unsteady and finally went steady. When the voltage was higher than the threshold value, the control was prominent and steady and flow separation could reattach to the airfoil suetion surface very well.