Flow-Field Analysis of a Typical Hydrogen-Fueled Dual-Mode Scramjet Combustor
Publication: Journal of Aerospace Engineering
Volume 25, Issue 3
Abstract
As one of the most promising propulsive systems for future hypersonic vehicles, the hydrogen-fueled dual-mode scramjet combustor has drawn the attention of an ever increasing number of researchers. The two-dimensional coupled implicit NS equations, the standard turbulence model, and the finite-rate/eddy-dissipation reaction model have been applied to numerically simulate the flow field of the dual-mode scramjet combustor, including the conditions of engine ignition and cold flow. The effect of the injection pressure and temperature on mode transition, and the movement of the shock-wave train, has been discussed. At the same time, the influence of the injection modes, namely, the transverse and horizontal, on the flow field of the combustor has been investigated. The obtained results show that the mode transition can be carried out by increasing the injection pressure and decreasing the injection temperature simultaneously. However, when the injection pressure is too high, the shock-wave train is pushed out of the isolator toward the entrance, and this causes inlet unstart. It has been found that the effect of the injection temperature on mode transition is smaller than that of the injection pressure. It is not easy to achieve mode transition when the fuel is injected horizontally into the airflow, and the combustion efficiency is lower than when the fuel is injected transversely.
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Acknowledgments
The first author, W. Huang, would like to express his sincere thanks for the support from the National Science Foundation of China (No. 90816027), the Excellent Graduate Student Innovative Project of the National Univ. of Defense Technology (No. B070101), the Hunan Provincial Innovation Foundation for Postgraduate (No. 3206), and the Chinese Scholarship Council (CSC) for their financial support (No. 2009611036). Also, the authors would like to thank the reviewers for some very constructive recommendations on this research paper.
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Information & Authors
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Published In
Journal of Aerospace Engineering
Volume 25 • Issue 3 • July 2012
Pages: 336 - 346
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jun 15, 2010
Accepted: May 26, 2011
Published online: May 28, 2011
Published in print: Jul 1, 2012
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