Experimental study on initiated reaction evolution of pressed explosives in long thick wall cylinder confinement

被引：0

作者：

Qiu T. ^{[1
,2
]}

Wen S. ^{[2
]}

Li T. ^{[3
]}

Hu H. ^{[3
]}

Fu H. ^{[3
]}

Shang H. ^{[3
]}

机构：

[1] CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD) Department of Modern Mechanics University of Science and Technology of China, Hefei, 230026, Anhui

[2] Institute of Chemical Materials, CAEP, Mianyang, 621999, Sichuan

[3] Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang, 621999, Sichuan

来源：

Baozha Yu Chongji/Explosion and Shock Waves | 2020年 / 40卷 / 01期

关键词：

Convective flow; DDT; Laminar burning; Pressed PBX;

D O I：

10.11883/bzycj-2019-0360

中图分类号：

学科分类号：

摘要：

In order to investigate whether the reaction evolution of pressed HMX-based PBXs inside long thick wall steel tube initiated by ignition composition leads to detonation finally or not, a new experiment apparatus was designed based on traditional DDT tube, in which the strength of tube at specific locations is enhanced, and multichannel PDV probes and high speed photography were used to diagnose the expansion process and rupture characteristics of tube wall. Compared with the results initiated by detonator in the same explosives and confinement, the reaction durations of detonation and ignition differed by orders of magnitude; the pressure evolution measured by tube wall velocities, and the propagation process of tube wall movement were significantly different in two reactions. Analysis shows that the convective flow of reaction products along the seam between tube wall and explosives, high temperature and pressure, dominated the reaction evolution of PBX-A initiated by ignition composition under strong confinement, and appeared as laminar burning on explosive surface and structural response of confinement. There is no reaction activated in explosive bulk by the ramp wave caused by upper stream non shock initiation reaction, least of all DDT. © 2020, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.

引用

共 17 条

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