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Investigations of separated flow over backward facing steps in IISc hypersonic shock tunnel

Reddeppa, P and Nagashetty, K and Jagadeesh, G (2009) Investigations of separated flow over backward facing steps in IISc hypersonic shock tunnel. In: 26th International Symposium on Shock Waves, JUL 15-20, 2007, Gottingen, Germany, pp. 631-636.

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Two backward facing step (2 mm and 3 mm step height) models are selected for surface heat transfer measurements. The platinum thin film gauges are deposited on the Macor inserts using both hand paint and vacuum sputtering technique. Using the Eckert reference temperature method the heating rates has been theoretically calculated along the flat plate portion of the model and the theoretical estimates are compared with experimentally determined surface heat transfer rate. Theoretical analysis of heat flux distribution down stream of the backward facing step model has been carried out using Gai’s non-dimensional analysis. Based on the measured surface heating rates on the backward facing step, the reattachment distance is estimated for 2 and 3 mm step height at nominal Mach number of 7.6. It has been found from the present study that for 2 and 3 mm step height, it approximately takes about 10 and 8 step heights downstream of the model respectively for the flow to re-attach.

Item Type: Conference Paper
Publisher: Springer
Additional Information: Copyright of this article belongs to Springer
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 16 Dec 2009 09:14
Last Modified: 16 Dec 2009 09:14
URI: http://eprints.iisc.ac.in/id/eprint/23670

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