Abstract
An experimental study is performed for a channel flow over a backward facing step with the plasma actuator. The plasma actuator is an electric device designed for flow control using electrohydrodynamic effect. The plasma actuator is set at the step edge or bottom of the step. The Reynolds number based on the mean velocity at the inlet and the step height ranges from 800 to 3000. The wall static pressure and pressure loss coefficient are measured behind the backward-facing step.The result shows that driving plasma actuator at step edge is more effective than that at bottom of the step for loss reduction.
