Experimental study of bubble pulsation by underwater explosion of CL-20-based explosives

FENG Song; RAO Guoning; PENG Jinhua; WANG Bin

doi:10.11883/bzycj-2017-0093

Volume 38 Issue 4

May 2018

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FENG Song, RAO Guoning, PENG Jinhua, WANG Bin. Experimental study of bubble pulsation by underwater explosion of CL-20-based explosives[J]. Explosion And Shock Waves, 2018, 38(4): 855-862. doi: 10.11883/bzycj-2017-0093

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FENG Song, RAO Guoning, PENG Jinhua, WANG Bin. Experimental study of bubble pulsation by underwater explosion of CL-20-based explosives[J]. Explosion And Shock Waves, 2018, 38(4): 855-862. doi: 10.11883/bzycj-2017-0093

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Experimental study of bubble pulsation by underwater explosion of CL-20-based explosives

doi: 10.11883/bzycj-2017-0093

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
National key Laboratory for Shock Waves and Detonation Physic Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

Received Date: 2017-03-27
Rev Recd Date: 2017-06-02
Publish Date: 2018-07-25

Abstract

Abstract

In this study, we investigated the effect of underwater explosion of CL-20-based explosive and CL-20-based aluminized explosive, by examining the dynamics of the bubble pulses generated by CL-20-based explosives charge underwater explosions in a 2 m×2 m×2 m water tank, with the pressure history of the shock wave measured. The process of the generation, expansion and contraction of the air bubble was observed clearly using the high-speed photo technology. The variation of the bubble radius, its expanding and contracting velocities, and its expanding and contracting accelerations with time was achieved in the bubble pulse process under the given experimental conditions. The bubble pulsation of the CL-20-based explosive and CL-20-based aluminized explosive were analyzed and compared. For the first time, secondary reaction process of the aluminum for the CL-20-based aluminized explosive underwater explosion was captured by the high-speed photo technology under the experimental conditions. The results show that the bubble radius and bubble periods of CL-20-based aluminized explosive went through an obvious increase, the bubble radius going up by 13.7% and the bubble period by 6.9%, respectively. The peak pressure of the shock wave exhibited a slight decrease. The technology of underwater explosion test and high-speed photography can be used to study the secondary reaction of aluminized explosive effectively.
- bubble impulsion,
- high speed photography,
- CL-20,
- aluminized explosive,
- secondary reactions

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References(16)

References

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