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Heat alleviation studies on hypersonic re-entry vehicles

Published online by Cambridge University Press:  15 November 2018

M. Khalid  and
K. A. Juhany Open the ORCID record for K. A. Juhany [Opens in a new window]
M. Khalid*
Affiliation:
Department of Aeronautical EngineeringKing Abdul Aziz UniversityJeddahSaudi Arabia
K. A. Juhany
Affiliation:
Department of Aeronautical EngineeringKing Abdul Aziz UniversityJeddahSaudi Arabia
*
*mkholid@kau.edu.sa
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Abstract

A numerical simulation has been carried out to investigate the effects of leading edge blowing upon heat alleviation on the surface of hypersonic vehicles. The initial phase of this work deals with the ability of the present CFD-based techniques to solve hypersonic flow field past blunt-nosed vehicles at hypersonic speeds. Towards this end, the authors selected three re-entry vehicles with published flow field data against which the present computed results could be measured. With increasing confidence on the numerical simulation techniques to accurately resolve the hypersonic flow, the boundary condition at the solid blunt surface was then equipped with the ability to blow the flow out of the solid boundary at a rate of at least 0.01–0.1 times the free stream (ρ∞u∞) mass flow rate. The numerical iterative procedure was then progressed until the flow at the surface matched this new ‘inviscid like’ boundary condition. The actual matching of the flow field at the ejection control surface was achieved by iterating the flow on the adjacent cells until the flow conformed to the conditions prescribed at the control surface. The conditions at the surface could be submitted as a ρ∞u∞ at the surface or could be equipped as a simple static pressure condition providing the desired flow rate. The comparison between the present engineering approach and the experimental data presented in this study demonstrate its ability to solve complex problems in hypersonic.

Keywords

Hypersonic flowheat transfer studiescomputational fluid dynamicsre-entry vehiclesfluid injectionstrong shock effects
Type
Research Article
Information
The Aeronautical Journal , Volume 122 , Issue 1257 , November 2018 , pp. 1673 - 1696
Copyright
© Royal Aeronautical Society 2018 

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