Effect of glow discharge on hypersonic flat plate boundary layer

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 (...

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Bibliographic Details
Published in:Applied mathematics and mechanics 2019-02, Vol.40 (2), p.249-260
Main Authors: Li, Chi, Zhang, Yunchi
Format: Article
Language:English
Subjects:
Applications of Mathematics
Boundary layers
Classical Mechanics
Flat plates
Fluid- and Aerodynamics
Frequencies
Glow discharges
Mathematical Modeling and Industrial Mathematics
Mathematics
Mathematics and Statistics
Partial Differential Equations
Particle image velocimetry
Rayleigh scattering
Velocity measurement
Wind tunnels
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Summary: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.
ISSN:0253-4827
1573-2754
DOI:10.1007/s10483-019-2424-9