摘要
利用CO2激光点火系统对含有纳米铝粉和纳米镍粉的AP/HTPB推进剂进行激光点火实验,测量了推进剂在不同激光功率和压强下的点火延迟时间,对推进剂的燃速、常压点火温度和爆热也进行了测量。同时,利用氧化还原滴定法测定燃烧残渣中活性铝含量。结果表明,纳米铝粉(n Al)的点火阀值比普通铝粉(g Al)的点火阀值小几个数量级,加入纳米铝粉可有效地缩短推进剂点火延迟时间。而在纳米镍粉为催化剂的协同作用下,推进剂燃速明显提高,点火延迟时间也大大减少,Al在推进剂燃烧过程中的燃烧效率得以提高,同时燃烧残渣中活性铝含量也明显降低。
Laser ignition test was made on the APHTPB propellant which contains nano metal powders (nano aluminum powders, nano nickel powders) by using a CO2 laser ignition system. The ignition delay time at different laser power and pressure, burning rates, heat of explosion, the ignition temperature of the propellants were measured. The content of active aluminum in the combustion residue was determined by means of the titration. The results show that the ignition threshold of nano aluminum (n-Al) is orders of magnitude lower than those of g-Al and the addition of n-Al can effectively shorten the propellant ignition delay time. With the co-operating effect of n-Ni, the addition of n-Al in propellants originally containing n-Ni can greatly increase the burning rate, shorten the ignition delay time, improve the combustion efficiency of Al in the combustion process of propellant and reduce the active aluminum content in combustion residues.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2004年第2期117-120,共4页
Journal of Solid Rocket Technology
基金
国家自然科学基金(59986003)
国防科技重点实验室基金。
关键词
纳米铝粉
纳米镍粉
激光点火
延迟时间
燃烧残渣
火箭推进剂
nano aluminum powder
nano nickel powder
laser ignition
ignition delay time
combustion residue
