Flow visualization and PIV measurement of airfoil separated flow control based on synthetic jet

Synthetic jet is a new method of active flow control.Firstly,the flow characteristics of a synthetic jet equipment based on the acoustic actuator were measured by the hot-wire anemometry.Then the control effects of synthetic jet on airfoil were studied by using flow visualization and PIV technique.The results of flow visualization show that synthetic jet technology is a very effective method to control and alleviate the airfoil separated flow at the high angle of attack.The PIV measurement results further show that the synthetic jet flow make the separated area reduced,and the separated position is moved downstream.The airfoil performance will be improved greatly by the synthetic jet technology to control the airfoil separated flow.