复合推进剂中铝粉粒度对分布燃烧响应和粒子阻尼特性影响

推进技术 ›› 2014, Vol. 35 ›› Issue (12): 1701-1706.

复合推进剂中铝粉粒度对分布燃烧响应和粒子阻尼特性影响

金秉宁,刘佩进,杜小坤,刘鑫,关昱

西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072

发布日期:2021-08-15
作者简介:金秉宁(1986—)，男，博士生，研究领域为固体火箭发动机燃烧不稳定。
基金资助:
国家自然科学基金(51206136)。

Effects of Different Aluminum Particle Sizes in Composite Propellant on Distributed Combustion Response and Particle Damping

Science and Technology on Combustion，Internal Flow and Thermal–Structure Laboratory，Northwestern Polytechnical University，Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermal–Structure Laboratory，Northwestern Polytechnical University，Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermal–Structure Laboratory，Northwestern Polytechnical University，Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermal–Structure Laboratory，Northwestern Polytechnical University，Xi’an 710072，China and Science and Technology on Combustion，Internal Flow and Thermal–Structure Laboratory，Northwestern Polytechnical University，Xi’an 710072，China

Published:2021-08-15

摘要/Abstract

摘要： 针对不同初始铝粉粒度的含铝复合推进剂，对其燃烧产物粒子阻尼特性和铝粒子分布燃烧响应特性进行了试验研究。试验结果表明:粒子阻尼的大小取决于流场中的凝相燃烧产物粒径分布和振荡频率，与推进剂中铝粉初始粒度基本无关；粒子阻尼预估方面，采用单一粒径预估的阻尼值与实际测量的阻尼值相比，仍存在一定的误差(>10%)，需要进一步改进；分布燃烧响应方面，在同一振荡频率范围内，分布燃烧响应特性与复合推进剂中初始铝粉粒度有关，即初始铝粉粒度越大，在燃烧过程中产生的分布燃烧增益越大，这对于发动机燃烧的稳定性是十分不利的。

关键词: 复合推进剂;铝粉粒度;分布燃烧响应；粒子阻尼

Abstract: According to the aluminized composite propellants with different initial particle sizes，the characteristics of the particle damping of condensed phase combustion products and the distribution combustion response were researched. The result shows that，particle damping is dependent on the particle size distribution of the condensed phase combustion products and the oscillation frequency，which is reasonably insensitive to the initial aluminum particle sizes. On the aspect of estimating the particle damping，the particle damping computed using the mono-sized particles were different from the value in the experiment，with the relative error more than 10 percent. Thus，further improvement on the prediction method is needed. On the aspect of distributed combustion response，the distributed combustion response is sensitive to the initial aluminum particle sizes in the same oscillation frequency，that is，the bigger the sizes of the initial aluminum particles are，the higher the combustion driven in the combustion，which is not good in solid rocket motor from a combustion instability point of view.

Key words: Composite propellant；Aluminum particle sizes；Distributed combustion response；Particle damping

金秉宁,刘佩进,杜小坤,刘鑫,关昱. 复合推进剂中铝粉粒度对分布燃烧响应和粒子阻尼特性影响[J]. 推进技术, 2014, 35(12): 1701-1706.

JIN Bing-ning,LIU Pei-jin,DU Xiao-kun,LIU Xin,GUAN Yu. Effects of Different Aluminum Particle Sizes in Composite Propellant on Distributed Combustion Response and Particle Damping[J]. Journal of Propulsion Technology, 2014, 35(12): 1701-1706.

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