Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Study of Hypersonic Flow Past Spiked Blunt Body Using Direct Simulation Monte Carlo Method
Jiss J. S., Sandeep E. J., Reji R.V., Suryan A., Kim H. D.
Abstract:
High speed flow past a blunt body generates a detached bow shock which leads to a high surface pressure and as a result the development of a high aerodynamic drag. One of the ways to reduce drag and heat flux is the employment of an aerospike. Flow under consideration occurs at rarefied conditions. In the present study, the flow around a blunted body fitted with an aerospike is analyzed using an open source Direct Simulation Monte Carlo (DSMC) code, called as dsmcFoam in OpenFOAM, at a high Mach number (M=6) at different length to diameter ratios (L/D = 1.5, 2) at an angle of attack 0o. The aerospike replaces the strong detached shock wave ahead of the body with a system of weaker oblique shock waves. A recirculating flow zone is developed between the shock and the blunt body, which acts like a streamlined profile, thus reducing the drag and wall heat flux. Reducing the aerodynamic drag ensures reaching the desired range or altitude, reduces the fuel usage, simplify the propulsion system requirements and maximize the ratio of payload to take off gross weight.
Keywords:
aerospike, hypersonic flow, recirculation zone, DSMC method

Fulltext: PDF DOI: http://dx.doi.org/10.14311/TPFM.2016.012

In Proceedings Topical Problems of Fluid Mechanics 2016, Prague, 2016 Edited by David Šimurda and Tomáš Bodnár, pp. 85-90 ISBN 978-80-87012-58-1 (Print) ISSN 2336-5781 (Print)