不同包覆剂对硼颗粒点火燃烧的影响  

Effects of coating agents on the ignition and combustion of boron particles

作　　者：席剑飞[1] 刘建忠[1] 汪洋[1] 李和平[1] 张彦威[1] 周俊虎[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,杭州310027

出　　处：《固体火箭技术》2013年第5期654-659,665,共7页Journal of Solid Rocket Technology

基　　金：国家自然科学基金(No.109203-N11119)

摘　　要：硼是固体贫氧推进剂的主要燃料,促进硼的点火燃烧对贫氧推进剂和固冲发动机有重要意义。文中使用AP、LiF、TMP 3种包覆剂对无定形硼粉进行包覆处理,并进行表征分析。利用热重和激光点火试验手段,研究了AP、LiF、TMP3种包覆剂对硼颗粒点火燃烧的影响。试验结果表明,硼在空气中的热反应过程可分为3个阶段,即预热期、剧烈反应期和后反应期;LiF和TMP均有助于降低硼的着火温度和促进硼的放热,而AP会小幅提高硼着火温度并减小硼的放热;激光点火试验时,AP可缩短点火延迟时间,并提高燃烧强度,LiF和TMP 2种包覆剂由于吸收了一部分激光能量而使点火延迟时间略有延迟,燃烧强度略有下降。Boron is an attractive candidate for the development of high-energy fuels.It is important to find ways for promoting ignition and combustion property of boron particles.In this paper,AP,LiF and TMP were used for boron surface coating.Then ignition and combustion behavior of original boron and coated boron were studied by using thermogravimetry coupled with differential scanning calorimetry （TG-DCS） and laser ignition test bench.Results show that the thermal reaction of boron in the air can be divided into three stages：warm-up period,violent reaction period and later reaction period.LiF and TMP can reduce the ignition temperature and increase heat release of the boron samples.AP can slightly raise the ignition temperature and decrease the boron heat release.During laser ignition test,AP can shorten the ignition delay time and improve the combustion intensity.On the other side,LiF and TMP can increase the ignition delay time and lower combustion intensity a little,because they absorb part of the energy from the laser.

关 键 词：硼 包覆 点火燃烧 热重 激光点火 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]