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Physics > Fluid Dynamics

arXiv:1607.00195 (physics)
[Submitted on 1 Jul 2016]

Title:Aerodynamic Heating in Hypersonic Boundary Layers:\ Role of Dilatational Waves

Authors:Yiding Zhu, Xi Chen, Jiezhi Wu, Shiyi Chen, Cunbiao Lee, Mohamed Gad-el-Hak
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Abstract:The evolution of multi-mode instabilities in a hypersonic boundary layer and their effects on aerodynamic heating are investigated. Experiments are conducted in a Mach 6 wind tunnel using Rayleigh-scattering flow visualization, fast-response pressure sensors, fluorescent temperature-sensitive paint (TSP), and particle image velocimetry (PIV). Calculations are also performed based on both parabolized stability equations (PSE) and direct numerical simulations (DNS). It is found that second-mode dilatational waves, accompanied by high-frequency alternating fluid compression and expansion, produce intense aerodynamic heating in a small region that rapidly heats the fluid passing through it. As a result, the surface temperature rapidly increases and results in an overshoot over the nominal transitional value. When the dilatation waves decay downstream, the surface temperature decreases gradually until transition is completed. A theoretical analysis is provided to interpret the temperature distribution affected by the aerodynamic heating.
Subjects: Fluid Dynamics (physics.flu-dyn)
Cite as: arXiv:1607.00195 [physics.flu-dyn]
  (or arXiv:1607.00195v1 [physics.flu-dyn] for this version)
  https://doi.org/10.48550/arXiv.1607.00195

Submission history

From: Yiding Zhu [view email]
[v1] Fri, 1 Jul 2016 10:23:07 UTC (713 KB)
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