Experimental investigation of S-shaped inlet aerodynamic performance enhancement by plasma synthetic jet
In order to effectively control the flow separation in the slit S-shaped inlet,the actuation charac-teristics and related flow control experiments were studied based on the plasma synthetic jet.The results show that under the condition that the energy deposition ratio of the actuator is determined,the discharge energy of the plas-ma synthetic jet actuator is independent of the actuation frequency.However,there exists an optimal actuation frequency for different energy deposition ratios,which maximizes the jet velocity.Based on the diagnosis of actua-tion characteristics,the effectiveness of plasma synthesis jet in improving the aerodynamic performance of slit S-shaped inlet was verified through wind tunnel experiments.The optimal actuation effect was to reduce the total pressure distortion index by 22.59%at an outlet speed of Ma=0.25.
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