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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (S2): 115-123.doi: 10.7527/S1000-6893.2022.27727

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Drag reduction characteristics of opposing plasma synthetic jet in hypersonic flow

Xudong ZHANG1,2, Zheng LI3, Hao DONG1,2(), Siyuan GAO1,2, Zubi JI3, Kaixin LI1,2, Guanghui BAI3   

  1. 1.College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
    2.Key Laboratory of Unsteady Aerodynamics and Flow Control,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
    3.Science and Technology on Space Physics Laboratory,China Academy of Launch Vehicle Technology,Beijing 100076,China
  • Received:2022-06-30 Revised:2022-07-29 Accepted:2022-08-25 Online:2022-12-25 Published:2022-08-31
  • Contact: Hao DONG E-mail:donghao@nuaa.edu.cn
  • Supported by:
    National Numerical Windtunnel Project(0747-2266SCCMY003);National Natural Science Foundation of China(11872208)

Abstract:

Plasma Synthetic Jet (PSJ) is a high-temperature, high-speed and zero-net mass flux jet generated by arc discharge in a semi-closed cavity, with the advantages of high jet velocity, strong penetration ability and fast response, thus having significant application potential in the flow control of hypersonic vehicles. To study the flow control and drag reduction effect of the PSJ on hypersonic vehicles, we numerically simulate the bluff body model in the Mach 6 flow field. The results show that the PSJ can significantly change the shock wave distance and drag characteristics. Within a cycle after discharge, the average drag can be reduced by 37.67%, the maximum drag reduction effect can reach 76.03%, the effect of shock wave control and flow drag reduction by the PSJ is verified, and the conversion mechanism of the short penetration mode and long penetration mode of the flow field is analyzed.

Key words: hypersonic, Plasma Synthetic Jet (PSJ), opposing jet, flow control, drag reduction, mode

CLC Number: