Influence of glow discharge on evolution of disturbance in a hypersonic boundary layer: The effect of second mode,Physics of Fluids

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Influence of glow discharge on evolution of disturbance in a hypersonic boundary layer: The effect of second mode
Physics of Fluids ( IF 4.1 ) Pub Date : 2020-07-02 , DOI: 10.1063/5.0011299
Yunchi Zhang ₁ , Chi Li ₁ , Cunbiao Lee ₁

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This is the companion volume on the effects of artificial disturbance on the transition process of a boundary layer over a flat plate. The artificial disturbance with the frequency in the range of second-mode instability is introduced into the boundary layer by glowing discharge on the surface of the plate. Experiments are performed using Rayleigh-scattering visualization, wall pressure pulsations measurement, and high-frequency schlieren visualization in the Φ300 mm hypersonic quiet wind tunnel at Peking University. It is found that the second-mode instability waves are stimulated remarkably by the artificial disturbance, and the boundary layer transition is triggered effectively. The second-mode instability interacts with the first mode via a phase-lock mechanism, which leads to the rapid amplification of the first mode and the moving forward of transition location.

更新日期：2020-08-01

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