Influences of the heating rate and rheological properties on slow cook-off response of composition B

ZHOU Jie; ZHI Xiaoqi; WANG Shuai; FAN Xinghua

doi:10.11883/bzycj-2019-0431

Volume 40 Issue 12

Dec. 2020

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ZHOU Jie, ZHI Xiaoqi, WANG Shuai, FAN Xinghua. Influences of the heating rate and rheological properties on slow cook-off response of composition B[J]. Explosion And Shock Waves, 2020, 40(12): 122302. doi: 10.11883/bzycj-2019-0431

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ZHOU Jie, ZHI Xiaoqi, WANG Shuai, FAN Xinghua. Influences of the heating rate and rheological properties on slow cook-off response of composition B[J]. Explosion And Shock Waves, 2020, 40(12): 122302. doi: 10.11883/bzycj-2019-0431

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Influences of the heating rate and rheological properties on slow cook-off response of composition B

doi: 10.11883/bzycj-2019-0431

1.
School of Electromechanic Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Jinxi Industries Group Corporation Limited, China North Industries Group Corporation Limited, Taiyuan 030051, Shanxi, China

Received Date: 2019-11-11
Rev Recd Date: 2020-01-02
Publish Date: 2020-12-05

Abstract

Abstract

In order to investigate the difference of internal temperature distribution and the location of response in slow cook off of Comp B with consideration about the rheology and its size-effect when under different heating rates, 2 types of cooking off bombs with diameters of 76 mm and 130 mm were designed. The temperature curves of the internal monitoring points in the bombs at the heating rates of 1 ℃/min and 3.3 ℃/h were obtained by the slow cook off test, and the characteristics of temperature field under various conditions were further analyzed in simulation. The results show that: at the heating rate of 1 ℃/min, the internal explosives of the 2 sizes of bombs have already responded before they have completely melted, affected by the convection, the explosive of the top melted significantly quicker than that of the bottom, size effect on the rheology was not obvious; When the heating rate is 3.3 ℃/h, after the phase changing is completely done, the intensity of internal flow field is low, and the temperature field of the smaller bomb changed very slowly. However, the internal temperature field in the larger bomb changed quickly to a typical liquid temperature field because of an intenser flow, size effect on the rheology was more palpable. Moreover, in any conditions, the highest temperature location, self-heating and response areas are all near the top of the explosive.
- Comp B,
- slow cook-off,
- rheological behavior,
- heating rate

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References(19)

References

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