Mode change characteristics of a three-dimensional scramjet at mach 8

Turner, James C. and Smart, Michael K. (2013) Mode change characteristics of a three-dimensional scramjet at mach 8. Journal of Propulsion and Power, 29 4: 982-990. doi:10.2514/1.B34569


Author Turner, James C.
Smart, Michael K.
Title Mode change characteristics of a three-dimensional scramjet at mach 8
Journal name Journal of Propulsion and Power   Check publisher's open access policy
ISSN 0748-4658
1533-3876
Publication date 2013-07-01
Year available 2013
Sub-type Article (original research)
DOI 10.2514/1.B34569
Volume 29
Issue 4
Start page 982
End page 990
Total pages 9
Place of publication Reston, VA United States
Publisher American Institute of Aeronautics and Astronautics
Collection year 2014
Language eng
Formatted abstract
Experiments were undertaken to investigate the variation in thrust and combustion efficiency of a threedimensional scramjet operating in different modes. The scramjet flowpath included a rectangular-to-elliptical shape transition inlet and a divergent elliptical combustion chamber, and the experiments replicated conditions for flight at Mach 8 and 32 km altitude. Two combustion chamber configurations were tested with the same overall length and area ratio, but with different lengths of constant area section before divergence. Injection of the hydrogen fuel was through portholes at the combustion chamber entrance. Both engine configurations underwent a significant change in operating character with increasing equivalence ratio that was consistent with a change from "supersonic" to "separated" combustion in a dual-mode scramjet. The configuration with longer constant area section changed mode at an equivalence ratio just less than one, with an abrupt increase in thrust. This was accompanied by a significant increase in the calculated fuel-based combustion efficiency from 25 to 72%. Mode change occurred at a significantly higher equivalence ratio for the combustor with shorter constant area section, indicating that small changes in combustor area distribution can have important effects on scramjet operability and performance
Keyword Elliptic Shape Transition
Inlet
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 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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