Application of inlet injection to a three-dimensional Scramjet at Mach 8

Turner, J. C. and Smart, M. K. (2010) Application of inlet injection to a three-dimensional Scramjet at Mach 8. AIAA JOURNAL, 48 4: 829-838. doi:10.2514/1.J050052


Author Turner, J. C.
Smart, M. K.
Title Application of inlet injection to a three-dimensional Scramjet at Mach 8
Journal name AIAA JOURNAL   Check publisher's open access policy
ISSN 0001-1452
Publication date 2010-04
Year available 2010
Sub-type Article (original research)
DOI 10.2514/1.J050052
Volume 48
Issue 4
Start page 829
End page 838
Total pages 10
Editor Peretz P. Friedmann
Place of publication United States
Publisher American Institute of Aeronautics and Astronautics
Collection year 2011
Language eng
Subject C1
Abstract An investigation of inlet injection in a scramjet having a three-dimensional inlet and an elliptical combustion was undertaken. Experiments were conducted using a test flow simulating a Mach 8.1 flight condition with an altitude of 32 km. The objective was to determine the feasibility of reducing the combustion-chamber length by injection of hydrogen fuel in the inlet. The study involved a self-starting three-dimensional inlet with an overall geometric contraction ratio of 5.80, of which 2.08 was internal. The fuel was injected through multiple portholes in the forward portion of the inlet to allow significant mixing upstream of the combustion chamber. The divergent elliptical combustion chamber had a length sized for fuel ignition and combustion only and used a fluid-dynamic ignition scheme requiring no physical obstructions to the flowpath. Results indicated that inlet injection produced robust combustion at good combustion efficiency over a large fueling range up to an equivalence ratio of 0.92. A further key result was that no evidence of combustion was observed in the inlet. These experiments suggest that fuel injection in the inlet is a promising concept for higher-speed scramjet applications.
Keyword ELLIPTIC SHAPE TRANSITION
SUPERSONIC COMBUSTOR
FLOW
PENETRATION
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 2011 Collection
 
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Created: Sun, 25 Apr 2010, 00:06:56 EST