A control method for attenuation history of shock wave generated by blast simulation shock tube based on high pressure gas driving technic

CHENG Shuai; TONG Nianxue; LIU Wenxiang; YIN Wenjun; LI Qinchao; ZHANG Dezhi

doi:10.11883/bzycj-2023-0094

Volume 44 Issue 5

May 2024

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CHENG Shuai, TONG Nianxue, LIU Wenxiang, YIN Wenjun, LI Qinchao, ZHANG Dezhi. A control method for attenuation history of shock wave generated by blast simulation shock tube based on high pressure gas driving technic[J]. Explosion And Shock Waves, 2024, 44(5): 052201. doi: 10.11883/bzycj-2023-0094

Citation:

CHENG Shuai, TONG Nianxue, LIU Wenxiang, YIN Wenjun, LI Qinchao, ZHANG Dezhi. A control method for attenuation history of shock wave generated by blast simulation shock tube based on high pressure gas driving technic[J]. Explosion And Shock Waves, 2024, 44(5): 052201. doi: 10.11883/bzycj-2023-0094

Citation:

CHENG Shuai, TONG Nianxue, LIU Wenxiang, YIN Wenjun, LI Qinchao, ZHANG Dezhi. A control method for attenuation history of shock wave generated by blast simulation shock tube based on high pressure gas driving technic[J]. Explosion And Shock Waves, 2024, 44(5): 052201. doi: 10.11883/bzycj-2023-0094

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A control method for attenuation history of shock wave generated by blast simulation shock tube based on high pressure gas driving technic

doi: 10.11883/bzycj-2023-0094

National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China

Received Date: 2023-03-14
Rev Recd Date: 2023-11-24

Available Online: 2024-03-11

Publish Date: 2024-05-08

Abstract

Abstract

A high-pressure-gas-driving blast wave simulation shock tube, commonly composed of driving section, throat section and expansion section, is an ideal platform for explosion damage effect research of long positive shock pressure duration time in the laboratory, as the ability of generating simulated shock wave with similar characteristics to real explosion wave. One of the core problems in the design of blast simulation shock tubes, is the control method of the simulated wave attenuation process by modifying the variable section structure and the driving section shape of the shock tube. In this article, a numerical calculation model of one-dimensional flow in the shock tube is established based on the explosion simulation shock tube in the laboratory, a similarity evaluation method of simulated shock wave and standard explosion wave in a shock tube based on determination coefficient is proposed referring to the statistical theory. Then, based on the flow characteristics of the variable section shock tube, the influence of the shape of the driving section on the shock wave attenuation history is studied. The results show that, it is feasible to acquire simulated wave with approximate exponential attenuation history of real blast wave, by using variable cross-section driving tube, of which the section diameter decreases with the growth of distance to the throat, optimizing the variable cross-section structure due to the determination coefficient, and controlling the motion property of expansion and compression wave in the shock tube.
- shock tube,
- blast wave simulation,
- shock wave overpressure,
- decay process control,
- similarity evaluation method

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References(19)

References

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