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Volume 35 Issue 3
Jun 2021
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Chinese Journal of High Pressure Physics  > 2021  >  35(3): 035201.
XU Rui, ZHI Xiaoqi, WANG Shuai. Influence of Venting Structure on the Cook-off Response Intensity of Composition B[J]. Chinese Journal of High Pressure Physics, 2021, 35(3): 035201. doi: 10.11858/gywlxb.20200657
Citation: XU Rui, ZHI Xiaoqi, WANG Shuai. Influence of Venting Structure on the Cook-off Response Intensity of Composition B[J]. Chinese Journal of High Pressure Physics, 2021, 35(3): 035201. doi: 10.11858/gywlxb.20200657
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Influence of Venting Structure on the Cook-off Response Intensity of Composition B

doi: 10.11858/gywlxb.20200657
  • 1.

    School of Electromechanical Engineering, North University of China, Taiyuan 030051, Shanxi, China

  • 2.

    Hubei Institute of Aerospace Chemical Technology, Xiangyang 441000, Hubei, China

  • Received Date: 18 Dec 2020
  • Rev Recd Date: 25 Dec 2020
    Abstract
  • In order to study the response characteristics of ammunition under the venting structure, the cook-off system of ammunition and the venting structure were designed, and the influence of the venting structure on the response intensity of Composition B under the thermal stimulation was studied. The temperature rise curve and response of Composition B with the venting structure were also obtained. The results show that the response level of the ammunition is detonation reaction without venting structure, and the response temperature of the ammunition is relatively low, and the response time is relatively short. When the area of the venting structure is 2.0% of the charge area, the response level of the ammunition is detonation response, and when the area of the venting structure is 2.5% and 3.5% of the charge area, the response level of the ammunition is combustion. When the ammunition approaches the response time, the venting structure is opened, which reduces the internal temperature of the explosive and prolongs the response time. The temperature distribution inside the ammunition is obtained by numerical simulation. The explosive temperature is distributed in layers at the response time, and the response point of explosive is located at the top of the explosive. The decomposition of RDX is the main factor in the ignition of Composition B. The pressure relief structure of ammunition can effectively reduce the response intensity of ammunition and improve the thermal safety of ammunition.

     

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