【摘 要】
：
Three Plasma Synthetic Jet Actuators (PSJA) under the high-frequency actuation are used to control the Shock Wave Boundary Layer Interaction (SWBLI),a high-speed schlieren image processing method based on spatial Fourier transform as well as snapshot prop
【机 构】
：
Science and Technology on Plasma Dynamics Laboratory,Air Force Engineering University,Xi’an 710038,C
论文部分内容阅读
Three Plasma Synthetic Jet Actuators (PSJA) under the high-frequency actuation are used to control the Shock Wave Boundary Layer Interaction (SWBLI),a high-speed schlieren image processing method based on spatial Fourier transform as well as snapshot proper orthogonal decomposition were used to study the control effect of high-frequency plasma synthetic jet on low-frequency unsteadiness of SWBLI.The analysis of the base flow shows that the separated shock wave actually has both large-and small-amplitude vibrations at low frequency.And the results revealed that the PSJA with an operating frequency of 2 kHz has the ability to reduce the energy of low-frequency component of shock wave motion,indicating that the 2 kHz actuation can effec-tively suppress low-frequency unsteadiness of the separated wave.Compared with the actuation fre-quency of 2 kHz,the energy of low-frequency component of the shock wave is enhanced under the 8 kHz actuation,which aggravates the low-frequency unsteady motion of the shock wave.It is likely that the actuation frequency is too high,thus the intensity of the precursor shock wave induced by PSJA becomes weaker.Additionally,as the 4 kHz actuation is applied,the pulsation of the sepa-ration region was enhanced,it is speculated that the actuation frequency is coupled with the oscil-lation frequency of the separation region.
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