摘要
为了解微细圆管中点火药的燃烧特性,采用高速摄影技术对微细圆管中B/KNO3的燃烧进行实验研究,结果表明:管壁热损失和管道阻力是影响微细圆管中B/KNO3燃烧稳定性的主要因素。圆管内径越小,管壁热损失和管道阻力越大,燃烧越不稳定。B/KNO3在内径1.0～2.0 mm石英管中稳定燃烧、燃速变化微弱。燃烧室压强为0.1～4.0 MPa时,B/KNO3燃速随压强增加,但并不符合燃速指数规律。当石英管内径减至0.5 mm时,燃烧不稳定,燃速随时间延长而变大;圆管内径进一步减小,产生击穿现象导致火焰熄灭。研究还表明在一定壁厚范围内,燃速反比于壁厚。
To understand combustion characteristics of igniter in microscale tube,B/KNO3 combustion in microscale tube were obtained from high-speed photography.Results show that wall heat loss and tube resistance are the main affecting factors for combustion stability.Combustion is stable in 1.0-2.0 mm quartz tube,and B/KNO3 burning rate varies weakly.B/KNO3 burning rate is proportional to combustion chamber pressure among 0.1-4 MPa,however,it is not consistent with exponent law.Combustion is unstable when the inner diameter of quartz tube is decreased to 0.5 mm,and the burning rate is increased with increasing of time.When the inner diameter of quartz tube is reduced further,breakdown phenomenon is produced and combustion quenching is caused.In addition,B/KNO3 burning rate is in inverse proportion to wall thickness in the certain extent.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2010年第3期335-338,共4页
Chinese Journal of Energetic Materials
基金
国家973项目资助
关键词
军事化学
微细圆管
B/KNO3
燃烧特性
热损失
管道阻力
military chemistry
microscale tube
B/KNO3
combustion characteristics
heat loss
tube resistance
