流体中速度场检测方案(粒子图像测速)

Plasma actuators have been identified as having great promise for flow control applications. A single dielectric barrier discharge (SDBD) plasma actuator consists of two staggered electrodes separated by a dielectric layer (Fig. 1). When an AC voltage of sufficient amplitude (a few kV) is supplied to the exposed electrode, it causes the air over the covered electrode to weakly ionize, resulting in a cold plasma. An electro-mechanical coupling with the ambient air is provided by the interaction between the ionized air and the electric field between the two electrodes, generating a body force.