不同装药形状TNT水中爆炸近场冲击波传播的实验研究  

Experimental Study on Near-field Shock Wave Propagation of Underwater Explosion of TNT with Different Charge Shapes

作　　者：李金河[1] 汪斌[1] 王彦平[1] 黄学义[2] 畅里华[2] 王旭[2] LI Jin-he;WANG Bin;WANG Yan-ping;HUANG Xue-yi;CHANG Li-hua;WANG Xu(National Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,CAEP,Mianyang Sichuan 621999,China;Institute of Fluid Physics,CAEP,Mianyang Sichuan 621999,China)

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621999 [2]中国工程物理研究院流体物理研究所,四川绵阳621999

出　　处：《火炸药学报》2018年第5期461-464,500,共5页Chinese Journal of Explosives & Propellants

基　　金：NSAF联合基金(U1430236)

摘　　要：为了研究TNT装药形状对其水中爆炸近场冲击波的影响,以SR35mm球形及Φ60mm×66mm和Φ25mm×50mm柱形TNT炸药为研究对象,利用自行研制的同时分幅扫描超高速光电摄影系统,在同一发实验中同时获得TNT炸药水中爆炸近场冲击波传播过程的分幅扫描图像和轴向扫描图像。分幅扫描结果表明,装药形状对近场冲击波的演化过程有较大影响,长径比越大,初始冲击波越细长。近场冲击波在传播过程中逐渐球形化,球形化的中心位于炸药的质心,说明远场冲击波的传播与装药形状及起爆方式无关。轴向扫描结果表明,柱形装药端面起爆时,沿起爆轴线方向2倍装药范围内,近场冲击波压力具有明显的定向增益,长径比越大,轴向峰值压力衰减越快。To research the influence of charging shape on the near-field shock wave of underwater explosion of TNT,the spherical TNT charge of SR35mm and cylindrical TNT charge ofΦ60 mm×66 mm andΦ25 mm×50 mm were selected as the research objects.In the same experiment,the framing scanning images and axial scanning images in the near-field shock wave propagation process of underwater explosion of TNT were achieved simultaneously by the self-developed ultrahigh-speed photoelectric photography system with simultaneous framing scan.The framing images show that the charge shapes have a great influence on the evolution of the near-field shock wave.The bigger the ratio of length to diameter,the more slender the initial shock wave.In the process of propagation,the near-field shock wave gradually becomes spherical,and the spherical center is located at the center of mass of explosive,which shows that the propagation of far-field shock wave is independent of the charge shapes and the initiation modes.The scanning results show that when the cylinder charge initiates at the side face,the pressure of near-field shock wave along the axis of initiation within two times charge range has an obvious directional grain,and the bigger the ratio of length to diameter,the faster the attenuation of axial peak pressure.

关 键 词：水中爆炸 装药形状 近场 冲击波 同时分幅扫描超高速摄影系统 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O347.5[理学—固体力学]