Influence of the ignition energy on combustion and explosion characteristics of single-base propellant

KANG Penglin; LI Xiaodong; LIU Wenjie; SUN Yantao; GUAN Yunfei; MA Zhigang; ZHAO Ziwen

doi:10.11883/bzycj-2022-0452

Volume 43 Issue 7

Jul. 2023

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KANG Penglin, LI Xiaodong, LIU Wenjie, SUN Yantao, GUAN Yunfei, MA Zhigang, ZHAO Ziwen. Influence of the ignition energy on combustion and explosion characteristics of single-base propellant[J]. Explosion And Shock Waves, 2023, 43(7): 072302. doi: 10.11883/bzycj-2022-0452

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Influence of the ignition energy on combustion and explosion characteristics of single-base propellant

doi: 10.11883/bzycj-2022-0452

College of Environment and Safety Engineering, North University of China, Taiyuan 030051, Shanxi, China

Received Date: 2022-10-19
Rev Recd Date: 2023-03-17

Available Online: 2023-04-11

Publish Date: 2023-07-05

Abstract

Abstract

A device was developed to experimentally explore the influences of the ignition energy on the combustion and explosion characteristics of single-base propellant. In order to control the ignition energy on the single-base propellant, the black powders with different masses were used to ignite the propellant in the combustion and explosion experiment. By analyzing the ablative traces on the inner wall of the witness plate and the confining steel cylinder, the combustion and explosion development process of the single-base propellant was discussed, and the influences of different ignition energies on the combustion and explosion characteristics of the single-base-propellant were obtained. The results show that, at the beginning of ignition, the combustion reaction of the propellant in the confining steel cylinder is incomplete and the reaction is weak according to the larger ablation trace diameter and lighter ablation trace color. After propagating a distance away from the ignition side, the combustion reaction becomes stronger, but the reaction is still incomplete at this time, smaller ablation diameter and deeper ablation color. While propagating to the end of the confinging steel cylinder, the propellant reaction is complete and the severity of reaction is relatively large, seen from the smaller ablation diameter and the lighter ablation color. At the ignition energies of 4.0, 5.0 and 8.0 kJ, the growth distances from initial ignition to rapid increase of reaction intensity were 54.66, 53.95 and 19.38 cm, respectively. At the ignition energy of 20.0 kJ, the propellant reaction is already strong at the beginning and grows stronger enough to produce obvious dents on the witness plate while propagating to the end. Also at this ignition energy, slow combustion, fast combustion and deflagration occur in the reacion of the propellant, respectively at different positions in the confining steel cylinder. The study enlights that the ignition energy has reference significance for the design of propellant charge.
- ignition energy,
- propellant,
- combustion and explosion,
- ablation diameter,
- RGB summation

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References(27)

References

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