Numerical study on enhancement of low speed axial compressor rotor performance under radial inlet distortion via DBD plasma actuators

Aero-engine entrance conditions are not always ideal, and, for various reasons, inlet distortion may occur and cause inlet blockage and reduction of compressor performance. this study aimed to numerically simulate the effects of plasma actuators on the enhancement of low-speed axial compressor rotor performance under radial inlet distortion. first, compressor performance was investigated under radial inlet distortion with 15% and 20% blockage and their destructive effects on stall margin. then, the effect of plasma actuators on rotor loss subjected to inlet distortion was investigated, using an algebraic model based on the plasma actuators' physics in the form of body force distribution in naiver-stokes equations. the results show that radial inlet distortion decreases the compressor's stall margin. in addition, according to the findings, applying plasma actuators boosts the flow momentum behind the distortion screen and reduces the blockage of the rotor tip region, leading to decreasing losses. furthermore, at 15% blockage, the plasma actuators increase the stall margin from -11% to -5% versus the rotor in clean condition.