Development of a miniature explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas

GUO Wei; XU Xiaohui; LI Gan; LI Jie; JIANG Haiming; LI Zhihao

doi:10.11883/bzycj-2021-0343

Volume 42 Issue 8

Sep. 2022

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GUO Wei, XU Xiaohui, LI Gan, LI Jie, JIANG Haiming, LI Zhihao. Development of a miniature explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas[J]. Explosion And Shock Waves, 2022, 42(8): 084101. doi: 10.11883/bzycj-2021-0343

Citation:

GUO Wei, XU Xiaohui, LI Gan, LI Jie, JIANG Haiming, LI Zhihao. Development of a miniature explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas[J]. Explosion And Shock Waves, 2022, 42(8): 084101. doi: 10.11883/bzycj-2021-0343

Citation:

GUO Wei, XU Xiaohui, LI Gan, LI Jie, JIANG Haiming, LI Zhihao. Development of a miniature explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas[J]. Explosion And Shock Waves, 2022, 42(8): 084101. doi: 10.11883/bzycj-2021-0343

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Development of a miniature explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas

doi: 10.11883/bzycj-2021-0343

State Key Laboratory of Explosion & Impact and Disaster Prevention & Mitigation, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Received Date: 2021-08-16
Rev Recd Date: 2021-10-22

Available Online: 2022-08-01

Publish Date: 2022-09-09

Abstract

Abstract

Aiming at the problem that the initiation mode of the explosion device is highly dependent on the gunpowder products in the simulation experiments of large-scale underground explosions in a vacuum chamber, and based on the similarity theory of underground explosions and the principle of the two-stage gas gun, a micro explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas was developed independently. A glass enclosure with compressed gas (filled by air compressor) was used to simulate the high-pressure cavity generated at the beginning of a real underground explosion. Two-stage high-pressure gas was used to drive marbles to break the glass shell synchronously, thus releasing the high-pressure gas in the spherical shell to simulate the ejection of gas products in a real underground explosion. The pressure in the launcher chamber is 4 MPa, and the residual steady-state gas pressure in the glass enclosure is about 3 kPa. The above set of the launch parameters can be used for simulation experiments of real underground explosions with an equivalent of 0−20 kt TNT. Through high-speed imaging of the air and water blasting sphericity tests, the reliability of the explosion device and the sphericity of the blasting effect were verified. When there is a difference in the internal and external pressure of the glass spherical shell, the cracks of the shell are fully developed and the fragments are evenly distributed. The applicability test shows that the blasting mechanism and blasting effect of the explosion device can meet the requirements of the simulation experiment of large-scale underground explosions in the vacuum chamber, and the device has the characteristics of high efficiency, low pollution, convenient operation, good repeatability, good controllability and low requirements for site conditions, which can provide a novel technology for the simulation experiments of large-scale underground explosions in the vacuum chamber.
- large-scale underground explosion,
- similarity experiment in a vacuum chamber,
- explosion device model,
- two-stage gas gun

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References(14)

References

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