Experimental and simulation of diffusion model and characteristics of explosive cloud at different wind fields

DUAN Zhongshan; GONG Pengbing; YUAN Wei; GUO Huiping; LUO Yongfeng; LUO Kunsheng

doi:10.11883/bzycj-2019-0097

Volume 40 Issue 5

May 2020

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DUAN Zhongshan, GONG Pengbing, YUAN Wei, GUO Huiping, LUO Yongfeng, LUO Kunsheng. Experimental and simulation of diffusion model and characteristics of explosive cloud at different wind fields[J]. Explosion And Shock Waves, 2020, 40(5): 055901. doi: 10.11883/bzycj-2019-0097

Citation:

DUAN Zhongshan, GONG Pengbing, YUAN Wei, GUO Huiping, LUO Yongfeng, LUO Kunsheng. Experimental and simulation of diffusion model and characteristics of explosive cloud at different wind fields[J]. Explosion And Shock Waves, 2020, 40(5): 055901. doi: 10.11883/bzycj-2019-0097

Citation:

DUAN Zhongshan, GONG Pengbing, YUAN Wei, GUO Huiping, LUO Yongfeng, LUO Kunsheng. Experimental and simulation of diffusion model and characteristics of explosive cloud at different wind fields[J]. Explosion And Shock Waves, 2020, 40(5): 055901. doi: 10.11883/bzycj-2019-0097

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Experimental and simulation of diffusion model and characteristics of explosive cloud at different wind fields

doi: 10.11883/bzycj-2019-0097

1.
Rocket Force University of Engineering, Xi’an 710025, Shaanxi, China
2.
Teaching and Research Secition of Environmental Engineering, Army Logistic University of PLA, Chongqing 401331, China
3.
The Institute of The Rocket Force, Beijing 100094, China

Received Date: 2019-03-29
Rev Recd Date: 2019-08-01

Available Online: 2020-04-25

Publish Date: 2020-05-01

Abstract

Abstract

In order to obtain the spatial and temporal distribution law and height variation model of TNT explosion cloud diffusion under different wind Fields, this paper theoretically describes the diffusion process and mechanism of the explosion cloud, and carries out the computational fluid dynamics (CFD) simulation and the field-time distribution experiment of the cloud diffusion under different horizontal wind speeds, and analyzes the diffusion process of the cloud. Morphology, temperature, density and speed change law were established, and the variation model of cloud height with time at different u-wind speeds and the final height calculation model of cloud were established. The results show that the CFD method simulation cloud diffusion results are consistent with the experimental results. The cloud height has a power function with an exponent of 0.5 under windless conditions. The final height and explosive equivalent can be fitted to a power function model with an index of 0.47. The horizontal wind will speed up the mixing of the cloud and the air, causing the exponential parameter of the power function model to decrease linearly with the wind speed becoming larger. The higher the wind speed, the faster the decay rate of the cloud, the shorter the rise time, and the lower the final height.
- TNT explosion,
- computational fluid dynamics (CFD),
- atmospheric wind field,
- cloud diffusion

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References(18)

References

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