Underexpanded jet-free stream interactions on an axisymmetric afterbody configuration

Mathur, NB and Yajnik, KS (1987) Underexpanded jet-free stream interactions on an axisymmetric afterbody configuration. In: 8th International Symposium on Air Breathing Engines, 14-19 June 1987, Ohio, United States.

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Abstract

The exhaust jet-freestream interactions of an axisymmetric afterbody configuration have been studied experimentally, using an equivalent body-of-revolution representative of an actual combat aircraft configuration. Attention is given to the effects of jet pressure ratio and freestream Mach number on boattail, base, and afterbody pressure drag, for Mach numbers of 0.6-1.1 and Reynolds numbers from 20 million/m to 35 million/m, at zero-deg incidence. Jet pressure ratio was varied over 1-6. The underexpanded jet plume primarily affects the afterbody pressure distribution, and therefore the afterbody pressure drag. (O.C.)

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Drag (hindrance);Stress concentration;Reynolds number; Engines;Equivalence;Combat aircraft;Streams;Aerodynamic charecteristics;Stream functions;Attack aircraft;Shock wave propagation;Jet flow
Subjects: AERONAUTICS > Aeronautics (General)
Division/Department: Experimental Aerodynamics Division, CSIR Centre for Mathematical Modelling and Computer Simulation
Depositing User: M/S ICAST NAL
Date Deposited: 10 Oct 2006
Last Modified: 24 May 2010 09:51
URI: http://nal-ir.nal.res.in/id/eprint/2952

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