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Measurement of Heat Transfer Rate on Backward-Facing Steps at Hypersonic Mach Number

Reddeppa, P and Nagashetty, K and Saravanan, S and Jagadeesh, G and Gai, SL (2011) Measurement of Heat Transfer Rate on Backward-Facing Steps at Hypersonic Mach Number. In: Journal of Thermophysics and Heat Transfer, 25 (3). pp. 321-328.

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Abstract

Two backward-facing models with step heights of 2 and 3 mm are used to measure the convective surface heat transfer rates by using platinum thin-film gauges, deposited on Macor inserts. Heat transfer rates have been theoretically calculated along the flat plate portion of a model using the Eckert reference temperature method. The experimentally determined surface heat transfer rate distributions are compared with theoretical and numerical estimations. Experimental heat flux distribution over a flat plate model showed good agreement with the reference temperature method at stagnation enthalpy range of 0.8-2 MJ/kg. Theoretical analysis has been used for downstream of a backward-facing step using Gai's nondimensional analysis. It has been found from the present study that approximately 10 and 8 step heights are required for the flow to reattach for 2 and 3 mm step height backward-facing step models, respectively, at a nominal Mach number of 7.6.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Aeronautics and Astronautics.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 30 Aug 2011 06:47
Last Modified: 01 Mar 2012 09:47
URI: http://eprints.iisc.ernet.in/id/eprint/39958

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