摘要
通过改变铝粉粒径大小制作高铝含量推进剂,在此基础上进行热分析试验、爆热测试以及燃速测试,分析总结了铝粉粒径大小对推进剂一次燃烧性能的影响。推进剂各组分相同时,热分析结果表明,推进剂凝相反应程度相近,铝粉粒径大小对推进剂凝相反应没有明显影响;爆热测试和燃速测试表明,超细铝粉可显著改善推进剂燃烧性能,提高燃速和爆热、降低压强指数,减少燃烧产物结块、改善产物分散性;同时,超细铝粉由于自身小尺寸优势在推进剂的燃烧过程中更多地参与了气相反应,提高了推进剂气相放热量。通过以上实验分析得出,铝粉主要参与推进剂气相反应,铝粉粒径大小对推进剂气相反应影响较大。
The thermal-analysis experiments,explosive heat experiments and burning rate experiments were taken for studying effects of aluminum particle size on primary combustion behavior of high aluminum content fuel-rich propellant.The thermal-analysis experiment results indicate that the condensed-phase reaction of propellants is similar,there is no significant effect of aluminum particle sizes on propellant condensed-phase reaction.Explosive heat experiments and burning rate experiments show that presence of UFAl（ultra-fine aluminum） improves the combustion performance of propellants evidently,for example,the increase of burning rate and heat of explosion,reduction of the burning rate pressure exponent and improvement of combustion product dispersive character.It was found that the heat of gas-phase reaction could be increased because of more and more UFAl took part in gas-phase reaction by virtue of its small size.Finally,the conclusion that aluminum powder is mainly involved in the propellant gas reaction and the gas reaction is great influenced by aluminum powder particle size can be found.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2010年第6期670-674,共5页
Journal of Solid Rocket Technology
关键词
富燃料推进剂
一次燃烧
铝粉粒径
热分析
fuel-rich propellant
primary combustion
aluminum particle
thermal-analysis
