Transition in Hypersonic Boundary Layers: Role of Dilatational Waves
Fluid Dynamics
2015-02-03 v2
Abstract
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.
Keywords
Cite
@article{arxiv.1501.06628,
title = {Transition in Hypersonic Boundary Layers: Role of Dilatational Waves},
author = {Chuanhong Zhang and Yiding Zhu and Huijing Yuan and Jiezhi Wu and Shiyi Chen and Cunbiao Lee and Mohamed Gad-el-Hak},
journal= {arXiv preprint arXiv:1501.06628},
year = {2015}
}
Comments
5 pages, 6 figures