Diagnostic Modelling of an Expansion Tube Operating Condition for a Hypersonic Free Shear Layer Experiment

McGilvray, M., Austin, J. M., Sharma, M, Jacobs, P. A. and Morgan, R. G. (2007). Diagnostic Modelling of an Expansion Tube Operating Condition for a Hypersonic Free Shear Layer Experiment. In: Peter Jacobs, Tim McIntyre, Matthew Cleary, David Buttsworth, David Mee, Rose Clements, Richard Morgan and Charles Lemckert, 16th Australasian Fluid Mechanics Conference (AFMC). 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (385-393). 2-7 December 2007.

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Author McGilvray, M.
Austin, J. M.
Sharma, M
Jacobs, P. A.
Morgan, R. G.
Title of paper Diagnostic Modelling of an Expansion Tube Operating Condition for a Hypersonic Free Shear Layer Experiment
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 2-7 December 2007
Convener School of Engineering, University of Queensland
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Journal name Proceedings of the 16th Australasian Fluid Mechanics Conference, 16AFMC
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
Open Access Status File (Author Post-print)
ISBN 978-1-864998-94-8
Editor Peter Jacobs
Tim McIntyre
Matthew Cleary
David Buttsworth
David Mee
Rose Clements
Richard Morgan
Charles Lemckert
Volume 1
Start page 385
End page 393
Total pages 9
Language eng
Abstract/Summary Computational simulations of the AIR-1 test condition in the University of Illinois’ Hypervelocity Expansion Tube were conducted to verify facility operation and to obtain free stream properties that are otherwise difficult to measure. Two types of simulation were undertaken. The first was a one-dimensional simulation of the entire facility and the second was a hybrid simulation, combining a one-dimensional simulation of the shock tube section with a two-dimensional simulation of the acceleration tube. The one-dimensional simulation matched the experimental data well, however the two-dimensional simulation did not initially match the experimental measurements of shock speed and test gas pitot pressure. Further investigation showed the shock speed discrepancy was consistent with air contamination into the acceleration tube and subsequent two-dimensional simulations assuming 10% air contamination showed reasonable agreement with experimental data. Using data taken from the two-dimensional simulation of the expansion tube as a transient inflow condition, modelling was undertaken of a free shear layer experiment being conducted in the facility. Results from equilibrium, finite rate, and perfect gas models were compared. The finite rate simulation provides the best agreement with experimental Schlieren images, with the simulation capturing the major flow structures seen in experiments.
Subjects 290501 Mechanical Engineering
290200 Aerospace Engineering
E1
780102 Physical sciences
290299 Aerospace Engineering not elsewhere classified
Q-Index Code E1

 
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Created: Wed, 19 Dec 2007, 20:07:37 EST by Laura McTaggart on behalf of School of Engineering