Simulation of a complete reflected shock tunnel showing a vortex mechanism for flow contamination
Article
Article Title | Simulation of a complete reflected shock tunnel showing a vortex mechanism for flow contamination |
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ERA Journal ID | 1299 |
Article Category | Article |
Authors | Goozee, R. J. (Author), Jacobs, P. A. (Author) and Buttsworth, D. R. (Author) |
Journal Title | Shock Waves: an international journal on shock waves, detonations and explosions |
Journal Citation | 15 (3-4), pp. 165-176 |
Number of Pages | 12 |
Year | 2006 |
Publisher | Springer |
Place of Publication | Berlin, Germany |
ISSN | 0938-1287 |
1432-2153 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s00193-006-0015-4 |
Web Address (URL) | http://springerlink.metapress.com/content/4551850182348751/fulltext.pdf |
Abstract | Simulations of a complete reflected shock tunnel facility have been performed with the aim of providing a better understanding of the flow through these facilities. In particular, the analysis is focused on the premature contamination of the test flow with the driver gas. The axisymmetric simulations model the full geometry of the shock tunnel and incorporate an iris-based model of the primary diaphragm rupture mechanics, an ideal secondary diaphragm and account for turbulence in the shock tube boundary layer with the Baldwin-Lomax eddy viscosity model. Two operating conditions were examined: one resulting in an overtailored mode of operation and the other resulting in approximately tailored operation. The accuracy of the simulations is assessed through comparison with experimental measurements of static pressure, pitot pressure and stagnation temperature. It is shown that the widely-accepted driver gas contamination mechanism in which driver gas jets along the walls through action of the bifurcated foot of the reflected shock, does not directly transport the driver gas to the nozzle at these conditions. Instead, driver gas laden vortices are generated by the bifurcated reflected shock. These vortices |
Keywords | shock tunnel; driver gas contamination; bifurcated reflected shock |
ANZSRC Field of Research 2020 | 401207. Fundamental and theoretical fluid dynamics |
510304. Thermodynamics and statistical physics | |
401213. Turbulent flows | |
Public Notes | Deposited in accordance with the copyright policy of the publisher. Copyright 2006 Springer Verlag. The original publication is available at www.springerlink.com |
Byline Affiliations | University of Queensland |
University of Oxford, United Kingdom |
https://research.usq.edu.au/item/9xvy5/simulation-of-a-complete-reflected-shock-tunnel-showing-a-vortex-mechanism-for-flow-contamination
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