摘要
为了研究宽温域环境对钝感炸药爆轰波波阵面曲率效应的影响,采用高速扫描照相技术及电探针测速技术获取了-55,11℃及70℃环境下JB-9014炸药三种直径(10,15,30 mm)药柱的拟定态爆轰波波形及波速。结果表明,同一温度下,小直径药柱拟定态爆轰波波速随直径呈上凸型曲线增长,而大直径药柱则呈上凹形曲线增长趋势;同一药柱直径下,JB-9014炸药拟定态爆轰波波速随环境温度的升高呈线性降低趋势,降低斜率与药柱直径相关。当采用多项式对JB-9014炸药爆轰波波速随药柱直径及环境温度的变化规律进行拟合时,拟合结果与实验数据吻合较好。三种直径JB-9014炸药的拟定态爆轰波波阵面形状随环境温度的升高逐渐变得平坦。当采用遗传算法对三种直径药柱的实验结果进行拟合时,获得了JB-9014炸药在宽温域环境下的曲率效应Dn(κ)关系参数。在当地曲率κ<0.16时,Dn(κ)关系曲线随温度的升高而降低,而κ>0.26的结果则相反。当采用爆轰冲击动力学(Detonation Shock Dynamics,DSD)方法对三种直径炸药的爆轰波非理想传播过程进行了计算时,计算结果与实验值吻合较好。
To study the influence of wide temperature range on the detonation wave front curvature rate for insensitive explo-sives,pseudo-steady-state detonation wave velocities and wave front shapes were obtained for JB-9014 with three different grain diameters(10,15,30 mm)at the temperature-55,11℃and 70℃by using high speed streak camera technique and electric pins velocimetry.Results show that at the same temperature,the pseudo-steady-state detonation wave velocity is concave down for small-diameter grain but it is concave up for large-diameter grain.At the same grain diameter,the velocity of pseu-do-steady-state detonation wave velocities of JB-9014 decreases linearly as the ambient temperature increases and the decrease of slope is related to the diameter of the grain.When the variation of detonation wave velocity of JB-9014 with grain diameter and ambient temperature is fitted by polynomial,the fitting results are in good agreement with the experimental data.For JB-9014 with three kinds of grain diameters,the pseudo-steady-state detonation wave front shape becomes flatter with the in-crease of the ambient temperature.When the experimental results of three kinds of grain diameters are fitted by genetic arithmetic method,the Dn(κ)parameters of JB-9014 over a wide temperature range are obtained.When the local curvature is less than 0.16,the Dn(κ)relation decrease with the increase of temperature,while the result is the opposite when the local curvature is greater than 0.26.When the detonation shock dynamics(DSD)method is used to calculate the non-ideal propagation process of detona-tion wave of grains with three kinds of diameters,the calculated results are in good agreement with the experimental values.
作者
郭刘伟
刘宇思
黄宇
张旭
郑贤旭
GUO Liu-wei;LIU Yu-si;HUANG Yu;ZHANG Xu;ZHENG Xian-xu(National Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621999,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2019年第12期1062-1068,共7页
Chinese Journal of Energetic Materials
基金
科学挑战专题(TZ2018001)
关键词
钝感炸药
曲率效应
拟定态波形
拟定态波速
爆轰冲击动力学(DSD)方法
insensitive explosive
curvature effect
pseudo-steady-state detonation wave front shape
pseudo-steady-state detona-tion wave velocity
detonation shock dynamics(DSD)method
