Applied Mathematics and Mechanics (English Edition) ›› 2019, Vol. 40 ›› Issue (2): 249-260.doi: https://doi.org/10.1007/s10483-019-2424-9

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Effect of glow discharge on hypersonic flat plate boundary layer

Chi LI1,2, Yunchi ZHANG1,2   

  1. 1. State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871, China;
    2. Department of Aeronautics and Astronautics, College of Engineering, Peking University, Beijing 100871, China
  • Received:2018-09-03 Revised:2018-10-16 Online:2019-02-01 Published:2019-02-01
  • Contact: Chi LI E-mail:lichi@pku.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos. 10921202, 11221061, 11632002, 11521091, and 11602005)

Abstract: Glow discharge is introduced as an artificial disturbance to investigate the evolution of first-and second-mode instabilities in a hypersonic flat plate boundary layer. Experiments are conducted in a Mach 6.5 quiet wind tunnel using Rayleigh scattering visualization and particle image velocimetry (PIV). Detailed analysis of the experimental observations is provided. It is found that the artificially introduced 17 kHz disturbance, which belongs to the first-mode frequency band, can effectively enhance first-mode waves. Moreover, it can enhance second-mode waves even more intensely. Possible mechanisms to explain this phenomenon are discussed.

Key words: Singular perturbation, limit equation, elliptic equation, particle image velocimetry (PIV), glow discharge, hypersonic

2010 MSC Number: 

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