Energy release characteristics of composite charge in confined space

ZHANG Xuerui; ZHOU Tao

doi:10.11883/bzycj-2023-0381

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ZHANG Xuerui, ZHOU Tao. Energy release characteristics of composite charge in confined space[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0381

Citation:

ZHANG Xuerui, ZHOU Tao. Energy release characteristics of composite charge in confined space[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0381

ZHANG Xuerui, ZHOU Tao. Energy release characteristics of composite charge in confined space[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0381

Citation:

ZHANG Xuerui, ZHOU Tao. Energy release characteristics of composite charge in confined space[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0381

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Energy release characteristics of composite charge in confined space

doi: 10.11883/bzycj-2023-0381

ZHANG Xuerui,
ZHOU Tao^,

Xi’an Modern Chemistry Research Institute, Xi’an 710065, Shaanxi, China

Received Date: 2023-10-17
Rev Recd Date: 2024-03-22

Available Online: 2024-03-26

Abstract

Abstract

In order to study the energy release characteristics of composite charge in confined space, a type of coaxial composite charge was designed with the inner layer of thermobaric explosive and the outer layer of mixed fuel of different components. And the mixed fuel was mainly composed of Al/PTFE active material or boron-based fuel. Al/PTFE active material can undergo a detonation-like reaction and provide energy for the shock wave, but its reaction products are all solid. The lack of gaseous medium is not conducive to shock wave propagation. However, boron-based fuel can decompose to produce gas under detonation loading, which can make up for the shortcomings of Al/PTFE active material. The mixed fuel formulations were designed and the content of boron-based fuel in different formulations was determined. The internal explosion test of composite charge was carried out by using sealed explosion device. The shock wave overpressure on the device wall and the quasi-static pressure were obtained, which can be used to evaluate the implosion power of the composite charges. The effects of boron-fuel content, secondary ignition energy and reactant concentration on the post-combustion reaction and energy release characteristics of the composite charges were investigated by using the method of implosion power evaluation. The experimental results show that the quasi-static pressure of the composite charge with the same mass but different boron-based fuel content increases first and then decreases with the increase of boron-based fuel content, and the optimal volume fraction of boron-based fuel decomposition products participating in the secondary reaction is about 1.0%. For the composite charge, because the oxygen content in the confined space is limited, when the concentration of substances involved in the secondary reaction reaches a certain threshold, the quasi-static pressure cannot be effectively improved by increasing the ignition energy or the reactant concentration, and the energy utilization rate is not improved.
- composite charge,
- internal explosion,
- quasi static pressure,
- Al/PTFE,
- boron-based fuel

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References(19)

References

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