Effect of glow discharge on hypersonic fiat plate boundary layer

O357.4; 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 velocim...

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Bibliographic Details
Published in:应用数学和力学（英文版） 2019, Vol.40 (2), p.249-260
Main Authors: Chi LI, Yunchi ZHANG
Format: Article
Language:English
Online Access:Get full text
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Summary:O357.4; 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 introdnced 17kHz 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.
ISSN:0253-4827