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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。通过风洞实验,研究了电极电压、电极位置和布置方式等参数对翼型分离控制的影响规律,并初步分析了等离子体流动控制机理。结果表明等离子体激励在失速迎角附近可以有效抑制翼型的流动分离,实现气流的完全再附着;在来流速度为20m/s时,将气流再附着的迎角提高了5°。
Particle Image Velocimetry (PIV) technique was used to study the control characteristics of dielectric barrier discharge plasma excitation on the NA-CA0015 airfoil surface flow separation. Through the wind tunnel experiment, the influences of electrode voltage, electrode position and arrangement on airfoil separation control were studied, and the plasma flow control mechanism was analyzed. The results show that the plasma excitation can effectively suppress the separation of airfoils near the stall angle of attack and achieve complete reattachment of the air stream. The attack angle of reattachment of the air stream is increased by 5 ° at a flow rate of 20 m / s.