Hypersonic impact flash characteristics of a long-rod projectile collision with a thin plate target

作     者：Yi-jiang Xue Qing-ming Zhang Dan-yang Liu Ren-rong Long Yang-yu Lu Tian-fei Ren Liang-fei Gong Yi-jiang Xue;Qing-ming Zhang;Dan-yang Liu;Ren-rong Long;Yang-yu Lu;Tian-fei Ren;Liang-fei Gong

作者机构：State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2021年第17卷第2期

页      面：375-383页

核心收录：

学科分类：08[工学] 082603[工学-火炮、自动武器与弹药工程] 0826[工学-兵器科学与技术] 

基　　金：This work was supported by the National Key R&D Programof China(Grant No.2016YFC0801204) the National Programon Key Basic Research Project of China(973 Program,Grant No.613312) 

主　　题：Hypersonic impact flash Radiation intensity Impact flash mechanism Environmental luminescence 

摘      要：Impact flash occurs when objects collide at supersonic speeds and can be used for real-time damage assessment when weapons rely on kinetic energy to destroy ***,the mechanism of impact flash remains unclear.A series of impact flash experiments of flat-head long-rod projectiles impacting thin target plates were performed with a two-stage light gas *** impact flash spectra for 6061 aluminum at 1.3e3.2 km/s collision speeds were recorded with a high-speed camera,a photoelectric sensor,and a time-resolved *** intensity of the impact flash exhibited a pulse characteristic with *** intensity(I)increased with impact velocity(V0)according to IfVn 0,where n?4.41 for V02 km/***,for V02 km/s,a continuous spectrum(thermal radiation background)was observed and increased in intensity with ***,for V02 km/s,only atomic line spectra were *** was no aluminum spectral lines for V02 km/s,which indicated that it had not been *** initial intense flash was emission from excited and ionized ambient gases near the impact surface,and had little relationship with shock temperature rise,indicating a new mechanism of impact flash.