Free-piston driver optimisation for simulation of high Mach number scramjet flow conditions

Gildfind, D. E., Morgan, R. G., McGilvray, M., Jacobs, P. A., Stalker, R. J. and Eichmann, T. N. (2011) Free-piston driver optimisation for simulation of high Mach number scramjet flow conditions. Shock Waves, 21 6: 559-572. doi:10.1007/s00193-011-0336-9

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Author Gildfind, D. E.
Morgan, R. G.
McGilvray, M.
Jacobs, P. A.
Stalker, R. J.
Eichmann, T. N.
Title Free-piston driver optimisation for simulation of high Mach number scramjet flow conditions
Journal name Shock Waves   Check publisher's open access policy
ISSN 0938-1287
Publication date 2011-11
Sub-type Article (original research)
DOI 10.1007/s00193-011-0336-9
Volume 21
Issue 6
Start page 559
End page 572
Total pages 14
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2012
Language eng
Formatted abstract
The University of Queensland (UQ) is currently developing high Mach number, high total pressure scramjet flow conditions in its X2 and X3 expansion tube facilities. These conditions involve shock-processing a high-density air test gas followed by its unsteady expansion into a low-pressure acceleration tube. This relatively slow shock-processing requires the driver to supply high pressure gas for a significantly greater duration than normally required for superorbital flow conditions. One technique to extend the duration is to operate a tuned free-piston driver. For X2, this involves the use of a very light piston at high speeds so that, following diaphragm rupture, the piston displacement substitutes for vented driver gas, thus maintaining driver pressure much longer. However, this presents challenges in terms of higher piston loading and also safely stopping the piston. This article discusses the tuned driver concept, the design of a very lightweight but highly stressed piston, and details the successful development of a new set of tuned free-piston driver conditions for X2.
Keyword Free-piston driver
Expansion tube
High total pressure
Tuned operation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Communicated by K. Hannemann.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
School of Mechanical & Mining Engineering Publications
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 09 Feb 2012, 16:28:20 EST by Mr David Gildfind on behalf of School of Mechanical and Mining Engineering