Transition in Hypersonic Boundary Layers: Role of Dilatational Waves
摘要：
Transition and turbulence production in a hypersonic boundary layer is investigated in a Mach 6 quiet wind tunnel using Rayleigh-scattering visualization, fast-response pressure measurements, and particle image velocimetry. It is found that the second instability acoustic mode is the key modulator of the transition process. The second mode experiences a rapid growth and a very fast annihilation due to the effect of bulk viscosity. The second mode interacts strongly with the first vorticity mode to directly promote a fast growth of the latter and leads to immediate transition to turbulence.
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DOI：
10.1063/1.4935019
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年份：
2015
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掌桥科研
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来源期刊
AIP Advances
2015-10-27
引用走势
2019
被引量：15
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