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

Content Provider	Springer Nature Link
Author	Gildfind, D. E. Morgan, R. G. McGilvray, M. Jacobs, P. A. Stalker, R. J. Eichmann, T. N.
Copyright Year	2011
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.
Starting Page	559
Ending Page	572
Page Count	14
File Format	PDF
ISSN	09381287
Journal	Shock Waves
Volume Number	21
Issue Number	6
e-ISSN	14322153
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-09-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Free-piston driver Expansion tube Scramjet High total pressure Optimisation Tuned operation Fluid- and Aerodynamics Engineering Thermodynamics, Heat and Mass Transfer Condensed Matter Physics Acoustics Thermodynamics Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanical Engineering

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