摘要
采用高速扫描相机及电探针,在室温环境下对不同初始密度(1.894~1.901g/cm3)、不同半径(5.0、7.5、15.0mm)的钝感炸药JBO-9021药柱开展了曲率效应实验,获取了拟定态爆轰波阵面形状及波速,分析了其随炸药柱密度及半径的变化。结果表明,随着炸药JBO-9021的初始密度由1.894g/cm3增至1.901g/cm3,3种不同半径JBO-9021药柱的爆轰波拟定态波速均增大,拟定态波阵面形状变得更为平坦,波阵面中心点与边界点之间的波到达时间差降低;在小曲率范围内(κ<0.2mm-1),JBO-9021药柱爆轰波波阵面法向波速Dn与当地曲率κ的关系(Dn(κ)关系)不受药柱半径及密度的影响,当曲率κ>0.2mm-1时,Dn(k)关系随药柱半径及炸药密度呈现离散趋势,药柱半径及初始密度共同影响爆轰波波阵面大曲率的Dn(κ)关系。
The curvature effect experiments were carried out for the insensitive JBO-9021 explosive grain with different radius（5.0,7.5 and 15 mm）and different initial densities（1.894 g/cm3-1.901 g/cm3）at ambient temperature by using the high-speed streak camera and electric probes,and the steady-state detonation front shape and wave velocity were obtained and the change with density and radius of explosive grain was analyzed.Results show that,with increasing the initial density of JBO-9021 explosive from 1.894 g/cm3 to 1.901 g/cm3,the steady-state wave velocities of detonation wave for three kinds of JBO-9021 explosive grains with different radius increase,the steady-state front shape becomes flatter and the difference of the wave arriving time between the center point and edge point of front becomes smaller.In the range of small curvature（κ0.2 mm-1）,the relationship between the normal wave velocity Dnand the local curvature,（Dn（κ））,for detonation wave front of JBO-9021 explosive is not affected by the radius and density of the explosive grain.For larger curvature ofκ0.2 mm-1,the Dn（κ）relationship reveals a discrete trend with the radius and density of the explosive grain.The initial density and radius of JBO-9021 explosive grain affect the Dn（κ）relationship of great curvature for detonation wave front of explosive together.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2017年第5期51-55,共5页
Chinese Journal of Explosives & Propellants
关键词
爆炸力学
钝感炸药
JBO-9021炸药
曲率效应
拟定态爆轰波形
拟定态爆轰波速
初始密度
Dn(κ)关系
explosion mechanics
insensitive explosive
JBO-9021 explosiv e
curvature effect
stea dy-sta te detona-tion front wave shape
stea dy-sta tedetonation wavevelocity
initial density
Dn （N） relationship
