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

QIU Tian; WEN Shanggang; LI Tao; HU Haibo; FU Hua; SHANG Hailin

doi:10.11883/bzycj-2019-0360

Volume 40 Issue 1

Jan. 2020

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QIU Tian, WEN Shanggang, LI Tao, HU Haibo, FU Hua, SHANG Hailin. Experimental study on initiated reaction evolution of pressed explosives in long thick wall cylinder confinement[J]. Explosion And Shock Waves, 2020, 40(1): 011405. doi: 10.11883/bzycj-2019-0360

Citation:

QIU Tian, WEN Shanggang, LI Tao, HU Haibo, FU Hua, SHANG Hailin. Experimental study on initiated reaction evolution of pressed explosives in long thick wall cylinder confinement[J]. Explosion And Shock Waves, 2020, 40(1): 011405. doi: 10.11883/bzycj-2019-0360

Citation:

QIU Tian, WEN Shanggang, LI Tao, HU Haibo, FU Hua, SHANG Hailin. Experimental study on initiated reaction evolution of pressed explosives in long thick wall cylinder confinement[J]. Explosion And Shock Waves, 2020, 40(1): 011405. doi: 10.11883/bzycj-2019-0360

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

doi: 10.11883/bzycj-2019-0360

QIU Tian^{1, 2
,},
WEN Shanggang²,
LI Tao³,
HU Haibo^{3
,
,},
FU Hua³,
SHANG Hailin³

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, China
2.
Institute of Chemical Materials, CAEP, Mianyang 621999, Sichuan, China
3.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621999, Sichuan, China

Received Date: 2019-09-18
Rev Recd Date: 2019-10-29

Available Online: 2019-10-25

Publish Date: 2020-01-01

Abstract

Abstract

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.
- pressed PBX,
- DDT,
- laminar burning,
- convective flow

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References(19)

References

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