Research on a Sudden Explosion and its Environmental Impact

5th Annual International Conference on Material Science and Engineering

Ye, Maosheng^1 ; Ma, Hui^2 ; Ni, Qingwei^1

China Eastern Route Corporation of South-to-North Water Diversion, Beijing, China^1

Beijing Municipal Commission of Urban Planning Tongzhou District Branch, Beijing, China^2

关键词: Air pollutants;    Cloud impacts;    Concentration values;    Developed model;    Directional diffusivity;    Emission point;    Point sources;    Virtual experimentations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/275/1/012022/pdf
DOI  :  10.1088/1757-899X/275/1/012022

来源: IOP

【 摘 要 】

A sudden blast was chosen as the studied topic. Also, one computer based virtual experimentation was used to estimate the dimensional impact of initial pollutant plume from blasts. Self-made method using Mathcad code was used to generate the output for the period of the first tenth of a second (1deci-second) to 1minute (60s) of the blast at the point source. It also depicted long-range air pollution travel within the first 1 to 10 minutes. In the case study, it assumed an average directional diffusivity of 1720 m2s-1which is about 25 per cent of the average generated speed of common explosives. The newly developed model revealed a plume cloud impact of 6.8×107μgm-3in the first 1millisecond (0.01s) which decayed suddenly to a value of 1.7×107μgm-3in the first 1decisecond (0.1s). The impact concentration at the point source by the end of the first second (1.0s) was 3.2×105μgm-3which implied a 99.5% sudden decay when compared to 0.01s concentration value at the emission point source. Computerized experiments observed that air pollutants release from explosives/blasts were dispersed into the atmosphere in the first few seconds by forceful injection instead of by gradual dispersion as is the case with normal air pollutants plume releases.