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Drag reduction by counterflow supersonic jet for a blunt cone in high enthalpy flows

Kulkarni, V and Reddy, KPJ (2009) Drag reduction by counterflow supersonic jet for a blunt cone in high enthalpy flows. In: 26th International Symposium on Shock Waves, JUL 15-20, 2007, Gottingen, Germany, pp. 571-576.

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Official URL: http://www.springerlink.com/content/r5q24877771783...


Counterflow supersonic jet is used as a drag reduction device during the experiments in free piston driven shock tunnel, HST3. Accelerometer based force balance is employed to measure the drag force experienced by the 60-degree apex angle blunt cone model without and with the supersonic jet opposing the hypersonic flow. It is observed that the drag force decreases with increase in injection pressure ratio until the critical injection pressure is reached. Maximum reduction in drag force of 44 percent is recorded at the critical injection pressure ratio 22.36. Further increase in injection pressure ratio has reduced the percentage drag reduction. Change in nature of the flowfield around the model has also been observed across the critical injection pressure ratio.

Item Type: Conference Paper
Publication: Shock Waves
Publisher: springer
Additional Information: Copyright of this Book belongs to springer.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 13 Dec 2009 10:05
Last Modified: 13 Dec 2009 10:05
URI: http://eprints.iisc.ac.in/id/eprint/23665

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