Title: A computational study on reduction of aerodynamic heating and drag over a blunt body in hypersonic turbulent flow using counter flow jet

Authors: S. Aruna; S.P. Anjali Devi

Addresses: Department of Mathematics, Bharathiar University, Coimbatore, Tamilnadu – 641046, India. ' Department of Applied Mathematics, Bharathiar University, Coimbatore, Tamilnadu – 641046, India

Abstract: In hypersonic flights, two vital problems are drag and aerodynamic heating. Both problems can be palliated by modifying the flow field at nose region of the hypersonic blunt body by using jet. In this study, feasibility of utilising a counter flow jet for the reduction of total drag and aerodynamic heating around coneogive blunt body in hypersonic turbulent flow is investigated. Flow field around the blunt body is calculated numerically in the free stream of Mach number of 6.5. Computation of drag and aerodynamic heating is made in the absence of jet and in the presence of jet. Contours of Mach number, temperature and density are presented to describe the flow patterns. Effective jet conditions for reduction of drag and aerodynamic heating are obtained. Eventually, a code is developed based on adaptive neuro-fuzzy inference system (ANFIS) for validating the numerical results obtained through CFD software.

Keywords: hypersonic speed; aerodynamic heating; k-ω SST; Jet Mach number; jet total pressure; diameter ratio; aerodynamic drag; blunt bodies; hypersonic turbulent flow; counter flow jets; hypersonic flight; adaptive neuro-fuzzy inference system; ANFIS; CFD; neural networks; fuzzy logic; computational fluid dynamics.

DOI: 10.1504/IJAD.2012.049128

International Journal of Aerodynamics, 2012 Vol.2 No.2/3/4, pp.240 - 276

Published online: 31 Oct 2014 *

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