Comparison of supersonic combustion characteristics of vaporized kerosene and ethylene

被引：0
|
作者：
Zhong Z. [1 ]
Wang Z.-G. [1 ]
Sun M.-B. [1 ]
机构：
[1] Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2016年 / 37卷 / 04期
关键词：
Combustion characteristic; Equivalence ratio; Ethylene; Mach number at the combustor inlet; Scramjet engine; Vaporized RP-3;
D O I：
10.13675/j.cnki.tjjs.2016.04.012
中图分类号：
学科分类号：
摘要：
To investigate the effects of fuel compositions variation on the combustion characteristics of scramjet engines, a series of combustion tests were conducted in a direct-connected test rig fueled with vaporized RP-3 and ethylene under the inflow conditions of Ma=2.92, 3.46, stagnation temperature Tt=1430K. The supersonic combustion characteristics of vaporized RP-3 and ethylene were compared and analyzed based on the ignition delay time, static pressure distribution along the combustor wall, thrust increments and fuel specific impulses. The results show that ethylene has a higher combustion performance and fuel utilization efficiency than that of vaporized RP-3 due to its higher activity. For the cases of Ma=2.92, equivalence ratio φ ≈ 0.60 and 1.06, the specific impulses of ethylene are approximately 15% and 7.2% higher than that of vaporized RP-3 respectively. When Ma increases to 3.46, the gaps of specific impulses between ethylene and vaporized RP-3 are slightly enlarged to approximately 18% and 9.6% under approximately equal φ. The test conditions such as the inflow Mach number at the combustor inlet and equivalence ratio have great impacts on the combustion characteristics of scramjet engines. The effects of fuel compositions on combustion characteristics are weakened with the increase of equivalence ratio, and are not sensitive to the inflow Mach number at the combustor inlet. © 2016, Journal of Propulsion Technology. All right reserved.
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页码：684 / 690
页数：6
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