Transition in hypersonic boundary layers

Chuanhong Zhang; Yiding Zhu; Xi Chen; Huijing Yuan; Jiezhi Wu; Shiyi Chen; Cunbiao Lee; Mohamed Gad-el-Hak

doi:10.1063/1.4935019

AIP Advances (Oct 2015)

Transition in hypersonic boundary layers

Chuanhong Zhang,
Yiding Zhu,
Xi Chen,
Huijing Yuan,
Jiezhi Wu,
Shiyi Chen,
Cunbiao Lee,
Mohamed Gad-el-Hak

Affiliations

Chuanhong Zhang: State Key Laboratory of Turbulence and Complex Systems, Collaborative Innovation Center for Advanced Aero-Engines, Peking University, Beijing 100871, China
Yiding Zhu: State Key Laboratory of Turbulence and Complex Systems, Collaborative Innovation Center for Advanced Aero-Engines, Peking University, Beijing 100871, China
Xi Chen: State Key Laboratory of Turbulence and Complex Systems, Collaborative Innovation Center for Advanced Aero-Engines, Peking University, Beijing 100871, China
Huijing Yuan: State Key Laboratory of Turbulence and Complex Systems, Collaborative Innovation Center for Advanced Aero-Engines, Peking University, Beijing 100871, China
Jiezhi Wu: State Key Laboratory of Turbulence and Complex Systems, Collaborative Innovation Center for Advanced Aero-Engines, Peking University, Beijing 100871, China
Shiyi Chen: State Key Laboratory of Turbulence and Complex Systems, Collaborative Innovation Center for Advanced Aero-Engines, Peking University, Beijing 100871, China
Cunbiao Lee: State Key Laboratory of Turbulence and Complex Systems, Collaborative Innovation Center for Advanced Aero-Engines, Peking University, Beijing 100871, China
Mohamed Gad-el-Hak: Department of Mechanical & Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA

DOI: https://doi.org/10.1063/1.4935019
Journal volume & issue: Vol. 5, no. 10
pp. 107137 – 107137-6

Abstract

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Transition and turbulence production in a hypersonic boundary layer is investigated in a Mach 6 wind tunnel using Rayleigh-scattering visualization, fast-response pressure measurements, and particle image velocimetry. It is found that the second-mode instability is a key modulator of the transition process. Although the second-mode is primarily an acoustic wave, it causes the formation of high-frequency vortical waves, which triggers a fast transition to turbulence.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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