Energy release characteristics of composite charge in confined space

ZHANG Xuerui; ZHOU Tao

doi:10.11883/bzycj-2023-0381

Volume 44 Issue 6

Jun. 2024

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ZHANG Xuerui, ZHOU Tao. Energy release characteristics of composite charge in confined space[J]. Explosion And Shock Waves, 2024, 44(6): 062302. 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, 2024, 44(6): 062302. doi: 10.11883/bzycj-2023-0381

ZHANG Xuerui, ZHOU Tao. Energy release characteristics of composite charge in confined space[J]. Explosion And Shock Waves, 2024, 44(6): 062302. 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, 2024, 44(6): 062302. 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

Publish Date: 2024-06-18

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 JHL-6 and the outer layer of mixed fuel of different components. The mixed fuel was mainly composed of Al/PTFE active material or boron-based fuel. The Al/PTFE active material can undergo a detonation-like reaction and provide energy for 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 the 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 on composite charge was carried out by using a 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 test 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, so 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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