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- Title
Effect of a supersonic counterflow jet on blunt body heat transfer rates for oncoming high enthalpy flow.
- Authors
Kulkarni, Vinayak; Reddy, K. P. J.
- Abstract
Heat transfer reduction studies, in the presence of a supersonic counterflow jet from the stagnation point of a 60-deg apex angle blunt cone, are conducted in a free piston driven hypersonic shock tunnel, HST3, to verify the effectiveness of this technique for high enthalpy flows. For flow of Mach number 8 with stagnation enthalpy of 5 MJ/kg, it has been observed that the heat transfer rate at some location decreases initially with increase in the injection pressure ratio until the critical injection pressure ratio is reached. A forty-five percent reduction in heat transfer rate near the stagnation point has been measured for the critical injection pressure ratio, equal to 14.91. A further increase in the injection pressure ratio reduces the overall percentage heat transfer reduction. The dependence of fluidic spike length on percentage heat transfer reduction has been confirmed.
- Subjects
HYPERSONIC aerodynamics; HEAT transfer; FREE piston engines; ENTHALPY; STAGNATION point
- Publication
Journal of Engineering Physics & Thermophysics, 2009, Vol 82, Issue 1, p1
- ISSN
1062-0125
- Publication type
Article
- DOI
10.1007/s10891-009-0173-1