Effect of Charge Defects on the Fast Cook-off Response Characteristics of Cast PBX Explosive Charge

LIANG Mingyang; ZHI Xiaoqi; YU Yongli; XIAO You

doi:10.11858/gywlxb.20240893

Volume 39 Issue 4

Apr 2025

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Chinese Journal of High Pressure Physics > 2025 > 39(4): 045101.

LIANG Mingyang, ZHI Xiaoqi, YU Yongli, XIAO You. Effect of Charge Defects on the Fast Cook-off Response Characteristics of Cast PBX Explosive Charge[J]. Chinese Journal of High Pressure Physics, 2025, 39(4): 045101. doi: 10.11858/gywlxb.20240893

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LIANG Mingyang, ZHI Xiaoqi, YU Yongli, XIAO You. Effect of Charge Defects on the Fast Cook-off Response Characteristics of Cast PBX Explosive Charge[J]. Chinese Journal of High Pressure Physics, 2025, 39(4): 045101. doi: 10.11858/gywlxb.20240893

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Effect of Charge Defects on the Fast Cook-off Response Characteristics of Cast PBX Explosive Charge

doi: 10.11858/gywlxb.20240893

1.
School of Electromechanical Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Jilin Jiangji Machine Special Industry, Ltd., Jilin 132021, Jilin, China
3.
Department of Intelligent Manufacturing, Automation Research Institute, Ltd., China South Industries Group Corporation, Mianyang 621000, Sichuan, China

Received Date: 24 Sep 2024
Rev Recd Date: 22 Oct 2024

Available Online: 01 Apr 2025

Issue Publish Date: 01 Apr 2025

Abstract

Abstract

To study the effect of explosive charge defects on fast cook-off response characteristics, fast cook-off tests were conducted on type Ⅰ cook-off bomb (with defect-free charges) and type Ⅱ cook-off bomb (with defective charges). The results showed that the response time of type Ⅱ cook-off bomb (128 s) is shorter than that of type Ⅰ cook-off bomb (132 s), and the maximum shock wave overpressure at 5 m (62.7 kPa) is higher than that of type Ⅰ cook-off bomb (12.5 kPa). This indicates that the combustion of the type Ⅱ cook-off bomb was more intense than the defect-free type Ⅰ cook-off bomb after ignition, although both of them exhibit the same response level of burning reaction. Furthermore, a coupled computational model of pool fire and cook-off specimen was established to simulate the heating of the specimen in the flame using Fluent software. It is found that the closer the defect is to the charge surface, the higher local temperature at the defect, but it does not significantly affect the response time of explosive charges.
- fast cook-off,
- pool fire simulation,
- charge defects,
- defect position

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References(19)

References

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Effect of Charge Defects on the Fast Cook-off Response Characteristics of Cast PBX Explosive Charge

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