Numerical simulation of gas explosion suppression by ultrasonic water mist based on the Cloud, Fog, and Edge Computing

Explosion suppression by water mist is a new technology for the control of coal mine gas explosion with the three elements in the gas explosion at the same time. By building the physical model of the horizontal laneway in mine, and using the method of theoretical research and numerical simulation, this paper studies the relationship between the number of nozzles and H2O percentage and the distance for stable percentage of H2O, and provides a reliable for the design of water mist system for gas explosion suppression in the horizontal laneway in mine.

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Numerical Analysis of Water Mist Flow Field for Gas Explosion Suppression in Upper Corner

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.4848 ◽

2011 ◽

Vol 71-78 ◽

pp. 4848-4851

Author(s):

Fan Mao Meng ◽

Zhi Chao Liu ◽

Zhi Zhong Liu

Keyword(s):

Numerical Analysis ◽

Flow Field ◽

Coal Mine ◽

Water Mist ◽

Gas Explosion ◽

Gas Concentration ◽

Methane Gas ◽

Gas Accumulation ◽

Explosion Suppression ◽

Mist Flow

The water mist is an economical and environmental agent for gas explosion suppression. It can be applied in the commonly gas concentration zones and the gas accumulation zones which is difficult to reduce the concentration of methane gas. By numerical analysis, this paper studies the effect of the direction and the number of the nozzles, and the distance form the nozzles to the wall at X direction in upper corner in coal mine. For gas explosion suppression in upper corner, it can use one nozzle which direction is same as the wind and the distance is 2m.

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Evaluation of propane explosion with applied water mist

Journal of Fire Sciences ◽

10.1177/07349041211043201 ◽

2021 ◽

Vol 39 (6) ◽

pp. 443-454

Author(s):

Ping-Jung Li ◽

Chao-Shi Chen ◽

Cheng-Yu Weng ◽

Hsin-Hsiu Ho

Keyword(s):

Water Mist ◽

Experimental Results ◽

Gas Explosion ◽

Applied Water ◽

Occurrence Time ◽

Fuel Concentration ◽

Explosion Suppression ◽

Explosion Limit ◽

Air Speed ◽

Entrained Air

This article discusses the overpressure of a gas explosion and the performance of applying water mist for explosion suppression. According to the experimental results, the larger the opening area, the more difficult it is for pressure to accumulate, resulting in lower overpressure of a gas explosion. When the opening was opened under a high air speed environment, the amount of entrained air was greater. Consequently, the occurrence time of the explosion was shorter than at a low air speed. Despite the water mist nozzle being installed outside the enclosure, a propane gas explosion still occurred regardless of the amount of water mist used, failing to suppress the explosion. However, the water mist nozzle installed inside the enclosure supplied an adequate amount of water mist that could wash a part of the propane, resulting in the fuel concentration dropping below the lower explosion limit, hindering the occurrence of an explosion.

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Numerical simulation of methane explosion suppression by ultrafine water mist in a confined space

Tunnelling and Underground Space Technology ◽

10.1016/j.tust.2020.103777 ◽

2021 ◽

Vol 109 ◽

pp. 103777

Author(s):

Xingyan Cao ◽

Zhirong Wang ◽

Yawei Lu ◽

Yue Wang

Keyword(s):

Numerical Simulation ◽

Water Mist ◽

Confined Space ◽

Explosion Suppression ◽

Methane Explosion

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Effect of Wind Speed to Water Mist in Coal Mine Laneway

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.4935 ◽

2011 ◽

Vol 71-78 ◽

pp. 4935-4938 ◽

Cited By ~ 1

Author(s):

Zhi Chao Liu ◽

Fu Wei Sun ◽

Fan Mao Meng

Keyword(s):

Numerical Analysis ◽

Wind Speed ◽

Coal Mine ◽

Water Mist ◽

Gas Explosion ◽

Explosion Suppression ◽

The Status ◽

The Relationship

There are many factors which affect the effectiveness of the gas explosion suppression by the water mist in the coal mine laneway. This paper studies the relationship between the wind speed and the status of the water mist by numerical analysis. The results shows, for gas explosion suppression in coal mine laneway, the water mist system must be arranged in the region that the wind speed is 5m/s or slower.

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