Experimental Research on Convective Burning in Explosive Cracks

doi:10.3969/j.issn.1000-1093.2019.01.012

Abstract

Abstract: To investigate the evolution law of burning in high explosive cracks and understand the mechanism of the complicated mechanical-heat-chemical coupling process for high intensity reaction of projectile fillings during accidental ignition, the evolutionary process of burning in preformed cracks inside HMX-based PBX under non-shock initiation was recorded by high-speed camera and pressure transducers. The influences of different crack widths on burning evolution are analyzed based on gas-dynamic choking theory. Experimental results reveal that, under relatively high constraint conditions, the convective burning in sub-millimeter cracks of explosive can produce high pressure exceeding 200 MPa, and the flame propagation speed exceeds 600 m/s. The comparison of different crack widths indicates that the pressure due to convective burning decreases with the increase in crack width, but the burning propagation speed increases. Key

Key words: explosive, crack, conductiveburning, convectiveburning

CLC Number:

TQ564.4⁺2

SHANG Hailin, YANG Jie, HU Qiushi, LI Tao, FU Hua, HU Haibo. Experimental Research on Convective Burning in Explosive Cracks[J]. Acta Armamentarii, 2019, 40(1): 99-106.

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第40卷第1期
2019 年1月兵工学报ACTA
ARMAMENTARIIVol.40No.1Jan.2019

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