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Title: Flow structure of a supersonic jet impinging on an axisymmetric deflector
Authors: Mehta, R C
Prasad, J K
Issue Date: Oct-1997
Publisher: NISCAIR-CSIR, India
Abstract: The flow structure of an under- and over expanded supersonic jets impinging on an axisymmetric deflector has been numerically and experimentally investigated The impinging jet is characterized by many discontinuities, such as jet shock, jet boundary, Mach disk, reflected shock and cone shock. In the numerical computations, the two-stage Runge-Kutta time-stepping scheme is employed to solve compressible, axisymmetric Euler equations. The experiment consists of schlieren flow visualization and measurements of pressure distributions. Effects of exit Mach number, expansion ratio and distance between nozzle exit plane to the apex of the deflector on flow structure of the jets are studied with the help of schlieren pictures, Mach contours and vector plots. Comparison of the present numerical analysis with the experimental results exhibit good agreement. It is observed that the vector plots of the impinging free jets differ appreciably from the impinging vector plots and formation of vortex is found in the vicinity of the deflector.
Page(s): 178-188
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.04(5) [October 1997]

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