Measurement and simulation of the interface in a low-enthalpy shock tunnel

Buttsworth, David R. and Goozee, Richard J. and Jacobs, Peter A. (2006) Measurement and simulation of the interface in a low-enthalpy shock tunnel. In: 14th International Space Planes and Hypersonic Systems and Technologies Conference (AIAA/AHI 2006), 6-9 Nov 2006, Canberra, Australia.

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Abstract

Measurements from a rake of heat flux probes installed in a 62.2 mm diameter shock tunnel have been used to deduce the thickness of the shock tube interface and its distribution across the tube for a primary shock Mach number of 2.3. The axial thickness of the interface was between about 0.32 and 0.42 m for locations from about 2.0 to 2.5 m downstream of the diaphragm station. Axisymmetric simulations using a compressible Navier Stokes solver to model the entire shock tunnel operating at this condition show a simulated interface distributed over an axial length of about 0.20 m at 2.0 m downstream of the diaphragm, thus underestimating the measured interface length by about 37 %. The simulations indicate that the diaphragm opening process has a strong influence on the interface development within the nominally inviscid core flow region of the tube. The shape
of the interface in these axisymmetric simulations differs from the experimental results and this is probably because the turbulent mixing within the interface is not adequately modelled. A review of previous data on the shock tube interface development indicates that the present results (both the experimental data and numerical simulations) are consistent with interface axial lengths obtained in previous shock tube studies.

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Item Type:	Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed:	Yes
Item Status:	Live Archive
Additional Information:	AIAA Paper 2006-8108. Permanent restricted access to paper due to publisher's copyright restrictions.
Faculty / Department / School:	Historic - Faculty of Engineering and Surveying - No Department
Date Deposited:	11 Oct 2007 00:58
Last Modified:	02 Jul 2013 22:42
Uncontrolled Keywords:	shock tube interface; shock tunnel; computer simulation; diaphragms; enthalpy; interfaces (materials); measurement theory; Navier Stokes equations
Fields of Research :	09 Engineering > 0901 Aerospace Engineering > 090199 Aerospace Engineering not elsewhere classified 02 Physical Sciences > 0299 Other Physical Sciences > 029904 Synchrotrons; Accelerators; Instruments and Techniques 09 Engineering > 0915 Interdisciplinary Engineering > 091502 Computational Heat Transfer
Socio-Economic Objective:	E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI:	http://eprints.usq.edu.au/id/eprint/2157

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