Shock Wave/Transitional Boundary-Layer Interactions in Hypersonic Flow

The experimental and numerical transitional interactions in hypersonic flow are studied. The experiments were performed on a hollow cylinder-flare model in the ONERAR2Ch wind tunnel at aMach number of 5 and for varying stagnation pressure. Wall pressure and heat-flux measurements, laser Doppler velo...

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Bibliographic Details
Published in:AIAA journal 2006-06, Vol.44 (6), p.1243-1254
Main Authors: Benay, R, Chanetz, B, Mangin, B, Vandomme, L, Perraud, J
Format: Article
Language:English
Subjects:
Aerodynamics
Boundary layer
Compressible flows
shock and detonation phenomena
Doppler effect
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Lasers
Physics
Shock-wave interactions and shock effects
Shock-wave interactions and shockeffects
Transition to turbulence
Turbulent flows, convection, and heat transfer
Velocity
Wind tunnels
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Summary:The experimental and numerical transitional interactions in hypersonic flow are studied. The experiments were performed on a hollow cylinder-flare model in the ONERAR2Ch wind tunnel at aMach number of 5 and for varying stagnation pressure. Wall pressure and heat-flux measurements, laser Doppler velocimetry, pitot boundary-layer surveys, surface flow visualizations, and schlieren photographs provide a precise and complete description of the flowfield. In all of the cases examined here, grid-converged axisymmetric mathematical solutions of the problem were obtained by use of the two-dimensional numerical simulation, but it was found that these solutions do not fit experiments when the Reynolds number is increased. A purely three-dimensional organization of the flow then appears, characterized by the Gortler vortices. Two families of solutions were thus evidenced, and the precise calculation of the physical one remains a numerical challenge. The prediction of transition by use of stability calculations is only partly possible because the waves used do not have a sufficiently general form to model such a complex physical problem. New information on the true nature of what is commonly called a transition mechanism in this kind of flow is deduced from these results. [PUBLICATION ABSTRACT]
ISSN:0001-1452
1533-385X
DOI:10.2514/1.10512