Production of high-Mach-number scramjet flow conditions in an expansion tube

Gildfind, David, Morgan, Richard G., Jacobs, Peter A. and McGilvray, Matthew (2014) Production of high-Mach-number scramjet flow conditions in an expansion tube. AIAA Journal, 52 1: 162-177. doi:10.2514/1.J052383

Author Gildfind, David
Morgan, Richard G.
Jacobs, Peter A.
McGilvray, Matthew
Title Production of high-Mach-number scramjet flow conditions in an expansion tube
Journal name AIAA Journal   Check publisher's open access policy
ISSN 0001-1452
Publication date 2014-01-01
Sub-type Article (original research)
DOI 10.2514/1.J052383
Volume 52
Issue 1
Start page 162
End page 177
Total pages 16
Place of publication Reston, VA, United States
Publisher American Institute of Aeronautics and Astronautics
Language eng
Formatted abstract
The expansion tube is the only type of ground test facility currently able to simulate high-Mach-number scramjet test flows. These access-to-space flow conditions are characterized by total pressures of the order of gigapascals. The University of Queensland’s X2 expansion tube facility has recently been used to generate scramjet flow conditions between Mach 10 and 14, relevant to a 96 kPa dynamic pressure ascent trajectory, with total pressures up to 10 GPa. These experiments have matched flight enthalpy and Mach number while achieving test flow static pressures considerably higher than the true flight values. This demonstrates that Reynolds number can also be matched, even for subscale models, thereby addressing one of the major challenges for ground testing of high-Mach-number scramjet design concepts. The routine operation of expansion tubes at high flight enthalpies has already been established; but for operation at lower enthalpies (relevant to scramjet testing), the wave processes within these machines become more tightly coupled and difficult to tune. This paper details the combined analytical and numerical processes used to develop new flow conditions in the X2 facility. Experimental results are presented, and axisymmetric computational fluid dynamics analysis is used to fully characterize the test flow properties.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 4 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 13 Jan 2014, 21:47:45 EST by Mr David Gildfind on behalf of School of Mechanical and Mining Engineering