Quantitative relationship between flow speed and overpressure of gas explosion in the open-end square tube

Lin Bai-quan; Hong Yi-du; Zhu Chuan-jie; Jiang Bing-you; Liu Qian; Sun Yu-min

doi:10.11883/1001-1455(2015)01-0108-08

Volume 35 Issue 1

Feb. 2015

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Lin Bai-quan, Hong Yi-du, Zhu Chuan-jie, Jiang Bing-you, Liu Qian, Sun Yu-min. Quantitative relationship between flow speed and overpressure of gas explosion in the open-end square tube[J]. Explosion And Shock Waves, 2015, 35(1): 108-115. doi: 10.11883/1001-1455(2015)01-0108-08

Citation:

Lin Bai-quan, Hong Yi-du, Zhu Chuan-jie, Jiang Bing-you, Liu Qian, Sun Yu-min. Quantitative relationship between flow speed and overpressure of gas explosion in the open-end square tube[J]. Explosion And Shock Waves, 2015, 35(1): 108-115. doi: 10.11883/1001-1455(2015)01-0108-08

Citation:

Lin Bai-quan, Hong Yi-du, Zhu Chuan-jie, Jiang Bing-you, Liu Qian, Sun Yu-min. Quantitative relationship between flow speed and overpressure of gas explosion in the open-end square tube[J]. Explosion And Shock Waves, 2015, 35(1): 108-115. doi: 10.11883/1001-1455(2015)01-0108-08

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Quantitative relationship between flow speed and overpressure of gas explosion in the open-end square tube

doi: 10.11883/1001-1455(2015)01-0108-08

Lin Bai-quan^{1, 2
,},
Hong Yi-du^{1, 2},
Zhu Chuan-jie^{1, 2},
Jiang Bing-you³,
Liu Qian⁴,
Sun Yu-min^{1, 2}

1.
Faculty of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116 Jiangsu, China
2.
State Key Laboratory of Coal Resources and Safe Mining, Xuzhou 221008, Jiangsu, China
3.
School of Mining and Safety Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
4.
School of Resource Engineering, Longyan University, Longyan 364012, Fujian, China

Received Date: 2013-04-25
Rev Recd Date: 2013-11-13
Publish Date: 2015-01-25

Abstract

Abstract

The main objective of this study is to establish the quantitative relationship between overpressure and flow speed in the open-end square tube by the numerical simulation. It is found that the numbers of the peak value of overpressure and flow speed at the same measured point are different. The peak overpressure always appears earlier than peak flow speed in time scale. In mast cases, larger side lenth of square tube corresponds to smaller peak overpressure, and the peak flow speed goes down slowly along the propagation direction. The peak overpressure decreases with the increasing of the distance far from ignition end. However, the peak flow speed increases with the stream wise distance. When normalized distance is less than 125, the peak overpressure and peak flow speed always presents an inverse relationship. Otherwise, the relationship is piecewise-linear. The results may provide reference for the study on evaluating the dust lifting ability behind shock wave in the limited spaces.
- mechanics of explosion,
- flow speed,
- overpressure,
- gas explosion

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References(23)

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