期刊
AEROSPACE
卷 9, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/aerospace9090506
关键词
mixing augmentation; shock wave; jet shear layer interaction; hydrogen; counter-flow jet; analytic hierarchy process; supersonic cross-flow
资金
- National Natural Science Foundation of China [12072367]
- Natural Science Foundation of Hunan Province [2020JJ4666]
- Graduate Research and Innovation Projects of Hunan Province [CX20210023]
This research investigates the impact of induced shock waves on fuel mixing in supersonic flow and finds that symmetric setting of shock wave generators achieves the highest mixing efficiency.
In the scramjet engine, the injection and mixing of fuel are the basis for organizing efficient combustion. The shock wave/jet shear layer interaction is one of the methods used to enhance fuel mixing in supersonic flow. In this research, the effect of the induced shock wave on the mixing augmentation of fuel counter-flow jet is studied in the supersonic crossflow. The results show that the symmetrical setting of the shock wave generators (SWGs) has the highest mixing efficiency but brings a greater total pressure loss. In the specific range, the mixing efficiency increases with the increase in the angle of the SWG, while the total pressure recovery coefficient is the opposite. The induced oblique shock wave acting on the front of the fuel jet has an obvious influence on the flow field, resulting in the highest mixing efficiency. In the end, the analytic hierarchy process (AHP) is used to evaluate the extent of mixing augmentation by mixing parameters, which provides a decision-making idea for the scheme decision of mixing augmentation.
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