Direct-Connect Experimental Investigation of Combustion Mode Transition for Scramjet Engine

被引：0
|
作者：
Xiao B.-G. [1 ]
Li L. [1 ]
Zhang S.-P. [1 ]
Yan Z.-H. [1 ]
Liu Y. [1 ]
机构：
[1] Science and Technology on Scramjet Laboratory, China Aerodynamics Research and Development Center, Mianyang
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2019年 / 40卷 / 02期
关键词：
Combustion mode; Direct connect; Experiment; Scramjet; Transition;
D O I：
10.13675/j.cnki.tjjs.170760
中图分类号：
学科分类号：
摘要：
In order to find the effects of combustion mode transition on scramjet operating characteristics, a direct-connect experiment of combustion mode transition, which realized using linear change of liquid kerosene mass flow rate, was carried out. The inlet flow conditions of isolator accord with the flight Mach number 4.5 in this experiment. Based on monitoring of typical parameters in the characteristic position, the combustion mode could be distinguished in real time, and the influence law of combustion mode transition on scramjet performance was also achieved. Results show that parameter catastrophe includes wall pressure and thrust performance occurred during the mode transition process, and hysteresis phenomenon was obvious. When the flow rate of kerosene increases and decreases at the same rate, the equivalence ratio was different at the time of mode transition, and the ratio was 0.55 and 0.488, respectively. At equivalence ratio 0.488, results show 8.05% lower in combustor specific thrust than that of equivalence ratio 0.55. There was a different combustion mode for the same equivalence ratio in the hysteresis interval, corresponding to different thrust performance of scramjet engine. © 2019, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：339 / 346
页数：7
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