Experimental study on explosion dispersion process of a multi-layer composite charge under different initiation modes

Defence Technology

Wen-bin Li¹  Wei Xiao²  Xiao-wen Hong³  Bo-liang Wang³  He-yang Xu³  Wei-bing Li³ 

[1] Corresponding author.;School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, PR China;ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, PR China;

关键词: Composite charge;    Initiation mode;    Blast wave;    Overpressure;    Dispersion radius;   

DOI  :  

来源: DOAJ

【 摘 要 】

The influence of initiation modes on the explosive dispersion process of the multi-layer composite charge (MCC) was studied. Overpressure sensors and high-speed photography system were used to investigate the energy release process of an MCC with a specific structure. The shock wave pressure and explosive dispersion characteristics of the MCC under different initiation modes were compared. The forming and expanding process of the shock wave of the composite charge under different initiation modes was determined. The separation position of the shock wave and fireball interface was determined. The calculation formulas of the shock radius and overpressure of the composite charge are presented. The radius of the shock wave of the composite charge was significantly affected by the initiation mode. Moreover, the development process of the composite explosive fireball under different initiation modes was analyzed, the variation rules of the composite charge dispersion radius and fireball dispersion velocity with time were obtained under the different initiation modes, the explosion energy release rate of composite charge under simultaneous initiation modes was the highest, and the peak overpressure under the simultaneous initiation mode was 1.61 times that of central single-point initiation.

【 授权许可】

Unknown