Layout optimization and influence law of cascade plasma flow control

In order to improve the plasma flow separation control abilities on highly loaded compressor cascade, optimizations of plasma aerodynamic actuation layouts were researched based on characteristics of the highly loaded compressor cascade flow field and plasma aerodynamic actuation. With typical actuation layout, influence factors on plasma compressor cascade flow control was studied experimentally. Results show that among the layouts of plasma aerodynamic actuations on suction surface, the actuation effect of streamwise direction near blade leading edge is better than that of pitchwise direction or that near trailing edge, and the multigroup electrodes of streamwise direction are most effective in flow control; the control effect of pitchwise plasma aerodynamic actuation on endwall is better than that of streamwise direction; the control effect of streamwise plasma aerodynamic actuations on suction surface combined with pitchwise ones on endwall is the best among all plasma aerodynamic actuation layouts. As the actuation voltage increases, the control effect of plasma aerodynamic actuation on flow separation becomes better, while with the increase of the incidence angle, the control effect is enhanced firstly and then decreases; by coupling the flow field instability, the unsteady plasma aerodynamic actuation leads to a better flow control effect than the steady plasma aerodynamic actuation method.