Based on a micro pulsed jet without external device control technology suitable for high-load compressor

experimental investigation at low Mach number state was carried out on the cascade tunnel

and the steady and dynamic pressure characteristics in no-control state were obtained. The characteristic frequency of the separated vortex was found to be about 478Hz

and the corresponding Strouhal number was about 0.2. The experiment of controlling separation flow by micro pulsed jet was performed

with the frequency of the micro pulsed jet from 148Hz to 840Hz. Results show that when the frequency of the micro pulsed jet ranges from 0.85 to 1.20 of characteristic frequency of the separated vortex

the control effect is more obvious. Compared with blade slot treatment in other steady control methods

the suction mass flow ratio of this micro pulsed control method is few

and the influence of suction phenomena on the flow characteristics of pressure side and overall performance has been decreased significantly.