铝含量对HTPB推进剂点火燃烧特性的影响  

Effect of Aluminum Content on the Ignition and Combustion Characteristics of HTPB Propellant

作　　者：谢佩霓 廖雪钦 张文科 高欢欢 刘建忠[1] XIE Pei-ni;LIAO Xue-qin;ZHANG Wen-ke;GAO Huan-huan;LIU Jian-zhong(Institute of Thermal Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学热能工程研究所,浙江杭州310027

出　　处：《火炸药学报》2025年第3期238-245,I0005,共9页Chinese Journal of Explosives & Propellants

摘　　要：为降低固体推进剂的特征信号,在保持配方总固体质量分数为84%的情况下,铝粉质量分数由16%逐步减少到4%,进行激光点火燃烧试验和凝相燃烧产物分析,得到了金属铝含量对推进剂燃烧特性的影响规律。结果表明,随着铝含量的逐步减少,丁羟复合固体推进剂整体燃烧稳定性减弱、火焰震荡幅度增大、点火延迟时间增大、线性燃烧时间变长、燃烧温度降低。随着铝含量的减少,燃面处的铝团聚由常规的“熔融铝团聚球”逐渐向“薄片状”发展,经超声后进行粒度分析可知大颗粒团聚体的尺度和数量均呈减少趋势。且燃烧效率随着铝含量的增加呈现先增后降的趋势,在铝粉质量分数8%时最佳,燃烧效率高达88.1%。In order to reduce the characteristic signal of solid propellant,while maintaining the total solid content of the formulation at 84%,the aluminum powder content is gradually decreased from 16%to 4%.Laser ignition combustion tests and condensed phase combustion product analysis were carried out,and the influence of metallic aluminum content on the combustion characteristics of solid propellants was obtained.The results show that with the gradual decrease of aluminum content,the overall combustion stability of the HTPB propellant weakens,the flame oscillation amplitude and the ignition delay time increase,the linear combustion time becomes longer,and the combustion temperature decreases.With the reduction of aluminum content,the aluminum agglomeration at the burning surface gradually develop from conventional‘molten aluminum agglomeration balls’to‘flakes’.After ultrasonic dispersion,particle size analysis shows that the size and number of large particle agglomerates are decreasing.Moreover,the combustion efficiency increases first and then decreases with the increase of aluminum content,and is optimal at the aluminum powder content of 8%,reaching 88.1%.

关 键 词：物理化学 铝粉 RDX HTPB推进剂 点火燃烧特性 凝相燃烧产物 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]