Flow instability in shock tube due to shock wave-boundary layer-contact surface interactions, a numerical study

Al-Falahi, Amir and Yusoff, M. Z. and Shuaib, N. H. and Yusaf, T. (2009) Flow instability in shock tube due to shock wave-boundary layer-contact surface interactions, a numerical study. European Journal of Scientific Research, 30 (1). pp. 164-176. ISSN 1450-216X

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Abstract

This paper describes numerical simulation of transient flow conditions in shock tube. A two dimensional time accurate Navier-Stokes CFD solver for shock tube applications is developed to perform the numerical investigations. The solver was developed based on the dimensions of a newly built short-duration high speed flow test facility at Universiti Tenaga Nasional “UNITEN” in Malaysia. The facility has been designed, built, and commissioned in such a way so that it can be used as a free piston compressor, shock tube, shock tunnel and gun tunnel interchangeably. Different values of diaphragm pressure ratios P4/P1 are applicable in order to get wide range of Mach number. In this paper, in order to obtain better understanding of the processes involved, CFD simulations were performed for selected cases and the results are analyzed in details. The shock wave motion was traced and in order to investigate the flow stability, details two dimensional effects were investigated. It was observed that the flow becomes unstable due to shock wave-boundary layer-contact surface interactions after shock reflected off the tube end.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Depositing User: Dr Talal Yusaf
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 22 Sep 2009 23:53
Last Modified: 21 Aug 2014 04:18
Uncontrolled Keywords: shock tube; shock wave; contact surface; boundary layer; CFD
Fields of Research (FOR2008): 09 Engineering > 0901 Aerospace Engineering > 090101 Aerodynamics (excl. Hypersonic Aerodynamics)
09 Engineering > 0901 Aerospace Engineering > 090103 Aerospace Structures
09 Engineering > 0901 Aerospace Engineering > 090102 Aerospace Materials
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI: http://eprints.usq.edu.au/id/eprint/5563

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