钝感炸药冲击起爆反应过程的 PDV 技术  

PDV Technology of Shock Initiation Reaction Process of Insensitive Explosive

作　　者：杨舒棋 张旭[1] 彭文杨 舒俊翔 刘寿先[1] 覃双 钟斌[1] YANG Shuqi;ZHANG Xu;PENG Wenyang;SHU Junxiang;LIU Shouxian;QIN Shuang;ZHONG Bin(Institute of Fluid Physics,CAEP,Mianyang 621999,Sichuan,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《高压物理学报》2020年第2期48-56,共9页Chinese Journal of High Pressure Physics

基　　金：军科委基础加强重点项目(2019-JCJQ-ZD-203);科学挑战专题(TZ2018001)。

摘　　要：为研究A型钝感炸药冲击起爆反应演化过程,进行了火炮驱动蓝宝石飞片的一维平面冲击实验。实验中采用光子多普勒测速仪(Photonic Doppler velocimetry,PDV)技术测量冲击起爆后台阶型炸药的粒子速度。在炸药不同厚度台阶的后界面固定镀铝膜的楔形氟化锂(LiF)窗口,利用阻抗匹配将PDV测量的LiF窗口波后粒子速度转化为炸药样品波后粒子速度。比较组合式电磁粒子速度计和PDV两种测速技术,结果表明,相较于组合式电磁粒子速度计,PDV测量的粒子精度更高。简要分析了PDV测速探头角度、探头孔径、窗口折射率等影响,得到PDV测速的相对不确定度小于1%。The shock initiation reaction of A-type insensitive explosive has been investigated by means of the one-dimensional planar impact experiment and photon Doppler velocimetry technique(PDV).In this experiment,a sapphire flyer was launched by the powder gun and then impacted the stepped insensitive explosive A.Meanwhile,the wedge-shaped lithium fluoride(LiF)windows coated with aluminum films were stuck to the different rear interfaces of stepped explosive.Therefore,the particle velocities among these interfaces could be measured.By employing the impedance matching method,the particle velocities in the explosive A were eventually obtained.The experimental results show that the PDV has a higher precision than the multiple electromagnetic particle velocity gauge.The effects of the speed probe’s angle,the probe’s aperture,and the refractive index of the window are briefly analyzed.The relative uncertainty of the measured speed is within 1%.

关 键 词：光子多普勒测速仪(PDV) 台阶型钝感炸药 边侧稀疏角 组合式电磁粒子速度计 

分 类 号：O384[理学—流体力学]