ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Effect of plasma actuator on lift-drag characteristics of high-speed airfoil
Received date: 2022-06-29
Revised date: 2022-07-29
Accepted date: 2022-08-03
Online published: 2022-08-08
Supported by
Provincial or Ministry Level Project
Plasma excitation is widely studied as an active flow control technology with a short response time. Numerical simulations are used to investigate the effects of the actuator cavity， actuator arrangement position， angle of attack， and discharge parameters on improvement in the lift-drag characteristics of hypersonic airfoils. Corresponding experimental validation is conducted. The results show that the cavity of the exciter will generate a drag reduction effect， and the time-average drag reduction effect of the cavity is better than that of the plasma actuator. The decreasing distance of the actuator to the airfoil leading edge leads to stronger improvement in the aerodynamic performance of the airfoil. The hypersonic airfoil leading edge wedge area is the optimum geometric position for the actuator to improve the aerodynamic performance of the airfoil. Increasing the inflow angle of attack reduces the negative effect of the actuator cavity on the airfoil aerodynamic performance when the actuator is in the optimum geometric position， while also impairing the time-average flow control performance of the actuator. In addition， to improve the exciter energy utilization efficiency， the effect of different discharge parameters on the aerodynamic performance improvement of the airfoil is studied. The optimum duty cycle of the plasma synthetic jet exciter for lifting the drag and lift characteristics of hypersonic airfoils is 1.83%. The results provide a reference for the control of hypersonic flow with plasma synthetic jet exciter.
Zhikun SUN , Zhiwei SHI , Weilin ZHANG , Zheng LI , Qijie SUN . Effect of plasma actuator on lift-drag characteristics of high-speed airfoil[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022 , 43(S2) : 23 -39 . DOI: 10.7527/S1000-6893.2022.27705
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