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Experimental studies the burning process of gelled unsymmetrical dimethylhydrazine droplets under oxidant convective conditions
Feng, SJ; He, B; He, HB; Su, LY; Hou, ZY; Nie, WS; Guo, XH;郭喜红
2013
发表期刊FUEL
卷号111页码:367-373
摘要Gelled hypergolic propellants offer potential safety and performance improvements over conventional liquid and solid propellants. Understanding the combustion process of single gelled droplets is the first basic step to predict their behavior in the future combustion chambers. Experimental studies were performed to investigate the burning behavior of gelled unsymmetrical dimethylhydrazine (UDMH) droplets under oxidant convective conditions. The effects of oxidant convective conditions including velocity and temperature on the burning behavior were analyzed. The burning process was broken down into four stages: heating and swelling period, initial combustion period, violent combustion period, and stable and extinguished combustion period. Sometimes the droplet inside seemed to be porous or botryoidal. The microexplosion period lasted for a long time sometimes exceeding about 70% of the burning lifetime, and the phenomenon of gas jet combustion due to the burst steam from microexplosions was founded. The conversion of burning flame from a layered and enveloped flame structure to an escaped flame structure with increase in the convective velocity was observed. When the enveloped flame appeared, it was more helpful to the burning process, and the intensity of microexplosions and the burning rate constant were found to increase with the convective temperature. When the escaped flame appeared, it was disadvantageous to the burning process, and the intensity of microexplosions decreases with rise in convective velocity. Compared with the escaped flame, the intensity of microexplosions of the enveloped flame was lower, but the frequency was higher. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
关键词Organic gel propellant UDMH Burning behavior Flame structure Oxidizer convective environment
学科领域Energy & Fuels; Engineering
DOI10.1016/j.fuel.2013.03.071
收录类别SCI
WOS记录号WOS:000321037600044
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223956
专题多学科研究中心
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GB/T 7714
Feng, SJ,He, B,He, HB,et al. Experimental studies the burning process of gelled unsymmetrical dimethylhydrazine droplets under oxidant convective conditions[J]. FUEL,2013,111:367-373.
APA Feng, SJ.,He, B.,He, HB.,Su, LY.,Hou, ZY.,...&Guo, XH;郭喜红.(2013).Experimental studies the burning process of gelled unsymmetrical dimethylhydrazine droplets under oxidant convective conditions.FUEL,111,367-373.
MLA Feng, SJ,et al."Experimental studies the burning process of gelled unsymmetrical dimethylhydrazine droplets under oxidant convective conditions".FUEL 111(2013):367-373.
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