Study on the characteristics of gas explosion affected by induction charged water mist in confined space

2016 ◽  
Vol 40 ◽  
pp. 227-233 ◽  
Author(s):  
Yong-liang Xu ◽  
Lan-yun Wang ◽  
Ming-gao Yu ◽  
Shao-jie Wan ◽  
Zhi-peng Song ◽  
...  
Keyword(s):  
Water Mist ◽  
Confined Space ◽  
Gas Explosion ◽  
Charged Water

scholarly journals Experimental and Mechanism Study of Electrically Charged Water Mist for Controlling Kerosene Fire in a Confined Space

2014 ◽  
Vol 71 ◽  
pp. 246-252 ◽  
Author(s):  
Yong-liang Xu ◽  
Lan-yun Wang ◽  
Dong-lin Liang ◽  
Ming-gao Yu ◽  
Ting-xiang Chu
Keyword(s):  
Water Mist ◽  
Confined Space ◽  
Mechanism Study ◽  
Electrically Charged ◽  
Charged Water

Experimental Study on Water Mist Suppression of Poly(Methyl Methacrylate) PMMA Fires

Volume 4 ◽  
2004 ◽  
Author(s):  
B. Yao ◽  
J. Qin ◽  
W. K. Chow
Keyword(s):  
Methyl Methacrylate ◽  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Water Mist ◽  
Doppler Velocimetry ◽  
Confined Space ◽  
Surface Cooling ◽  
Fuel Surface ◽  
Poly Methyl Methacrylate

Suppression of Poly(methyl methacrylate) PMMA fires by water mist will be studied in this paper. A simple test is developed to study the critical water flow rate under different radiant heat flux. The test is found to be suitable for studying the extinguishment effects of fine water droplets involving oxygen displacement, gas phase and fuel surface cooling. Water mist is generated by a single pressure nozzle, with the water mist characteristics measured by the Laser Doppler Velocimetry or the Adaptive Phase Doppler Velocimetry System (LDV/APV system). The interaction between water mist and the PMMA flame will be studied in a confined space with ventilation control in a cone calorimeter. The heat release rate, oxygen, carbon dioxide and carbon monoxide concentrations, and other important parameters of the interaction under various conditions are measured. It is found that discharging adequate amount of water mist would suppress the diffusion flame in the confined space. Reignition might occur once water mist stopped discharging to the fuel surface. Higher heat release rate and more smoke and toxic gases were produced than from those in first ignition.

Experimental study on suppressing PVC fire with water mist in a confined space

2007 ◽  
Vol 92 (5) ◽  
pp. 747-751 ◽  
Author(s):  
Jianghong Liu ◽  
Jun Qin ◽  
Xin Huang ◽  
Guangxuan Liao
Keyword(s):  
Experimental Study ◽  
Water Mist ◽  
Confined Space

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

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.

Coal combustion restrained by ultra-fine water mist in confined space

2009 ◽  
Vol 19 (5) ◽  
pp. 574-579 ◽  
Author(s):  
Ming-gao YU ◽  
Ke YANG ◽  
Hai-lin JIA ◽  
Chang LU ◽  
Lai-xiang LU
Keyword(s):  
Coal Combustion ◽  
Water Mist ◽  
Confined Space

Evaluation of propane explosion with applied water mist

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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