Title: Application of an opposing jet in shock wave reduction around a blunt body

Authors: Laurent Dala

Addresses: School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Johannesburg, Private Bag 3, WITS 2050, South Africa

Abstract: The reduction of surface pressure of blunt bodies in two dimensional supersonic flows is investigated in regard to the application of opposing jets originating from the centre of the blunt body. The effect of application of the jet from a spike attached to the blunt body is also investigated. Results show good correlation with previous studies regarding blunt and opposing jets. Data has been gathered on the blunt body surface pressure fluctuations and bow shock frequency. In this paper, it is shown that drag reducing properties of opposing jets can be enhanced when the jet originates from a relatively short spike attached to a blunt body.

Keywords: supersonic flows; shock reduction; opposing jets; shock waves; blunt bodies; spike attachment; aerodynamics; surface pressure fluctuation; bow shock frequency; drag reduction.

DOI: 10.1504/IJAD.2012.049131

International Journal of Aerodynamics, 2012 Vol.2 No.2/3/4, pp.277 - 293

Published online: 31 Oct 2014 *

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