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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Veröffentlicht in:	Applied mathematics and mechanics 2019-02, Vol.40 (2), p.249-260
Hauptverfasser:	Li, Chi, Zhang, Yunchi
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Zusammenfassung:	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