期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 46, 页码 25426-25437出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.06.055
关键词
Hydrogen multi jets; Supersonic flow; Combustion chamber; Angled free stream; Computational fluid dynamic
资金
- NSFC [51775546, 51979261]
- Fundamental Research Funds for Central Universities [201941008]
- Australia ARC DECRA [DE190100931]
- Fujian Province Natural Science Foundation [2018J01506]
- Science Fund of Key Laboratory of Hubei Province in Design and Test of Power System of Pure Electric Vehicle [XKQ2020002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
The fuel mixing process within the combustion chamber is a critical procedure for advance of scramjet engine. In current study, the influence of free stream angle on the fuel mixing process of multi jets was thoroughly investigated. This research attempts to applied computational technique to disclose the structure of multi-fuel jets when the supersonic air stream is not normal to the jet direction. The effect of both positive and negative supersonic free stream on the diffusion and penetration of multi-hydrogen jets is fully described. The attention of this research is the flow structure of the multi jets and their interaction in the presence of different free stream angle. Our results indicate that the positive free stream angle expands the mixing zone in the downstream while the negative angle of free stream limited jet distribution inside the combustor. Our results show that mixing efficiency increase approximately 50% when the angle of free stream augments from +20 degrees to -20 degrees. According to our findings, mixing efficiency surges up to 17% when the jet spaces are increased from 4Dj to 10 Dj. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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