Experimental study on gas explosion hazard under different temperatures and pressures

Gao Na; Zhang Yansong; Hu Yiting

doi:10.11883/1001-1455(2016)02-0218-06

Volume 36 Issue 2

Oct. 2018

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Gao Na, Zhang Yansong, Hu Yiting. Experimental study on gas explosion hazard under different temperatures and pressures[J]. Explosion And Shock Waves, 2016, 36(2): 218-223. doi: 10.11883/1001-1455(2016)02-0218-06

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Experimental study on gas explosion hazard under different temperatures and pressures

doi: 10.11883/1001-1455(2016)02-0218-06

1.
School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, Jiangsu, China
2.
Chongqing Research Institute of China Coal Technology & Engineering Group Corporation, Chongqing 400037, China

Received Date: 2014-08-26
Rev Recd Date: 2014-11-25
Publish Date: 2016-03-25

Abstract

Abstract

In order to study the gas explosion hazards under different initial temperatures and high pressures, an experimental study was conducted on methane/air explosion under high temperatures and pressures with a special environmental testing system for studying explosion characteristics, with which the explosion limits were obtained under high temperatures (25-200℃) and high pressures (0.1-1.0 MPa) and so were the maximum explosion pressure and ignition delay time were also under high initial temperatures (25-200 ℃). The experimental results show that with the initial temperature and pressure rising up, the upper gas explosive limit increases, its lower limit decreases, resulting in a widened range of explosive limits. Compared with the narrower range of explosive limits under ordinary temperatures and pressures, the width of the explosive range at 200 ℃ and 1.0 MPa was increased by 101.77% so that the gas explosive probability increases. With the initial temperature rising up, the maximum gas explosive pressure decreases. Compared with the maximum explosive pressure at 25 ℃ and 0.1 MPa, the one at 200 ℃ and 0.1 MPa decreases by 35.89%. When the initial temperature increases, the ignition delay time of gas explosion is shortened. Based on the analysis of the experimental results and the reference of safety principles, a preliminary assessment method of the gas explosion hazard is put forward, which provides a certain basis for the prevention and treatment of gas explosion.
- mechanics of explosion,
- explosion limits,
- maximum explosion pressure,
- ignition delay time,
- risk assessment,
- gas explosion

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References

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