scholarly journals Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion

ACS Omega ◽  
2021 ◽  
Vol 6 (15) ◽  
pp. 10072-10084
Author(s):  
Hui Zhou ◽  
Chaomin Mu
Keyword(s):  
Flame Propagation ◽  
Propagation Characteristics ◽  
Evolution Laws ◽  
Air Explosion ◽  
Cavity Width ◽  
Powder Filling

Flame propagation characteristics and explosion behaviors of aluminum dust explosions in a horizontal pipeline

2020 ◽  
Vol 359 ◽  
pp. 172-180 ◽  
Author(s):  
Shulin Zhang ◽  
Mingshu Bi ◽  
Mingrui Yang ◽  
Bo Gan ◽  
Haipeng Jiang ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Propagation Characteristics ◽  
Dust Explosions

Experimental study of the flame propagation characteristics of pulverized coal in an O2/CO2 atmosphere

Fuel ◽  
2020 ◽  
Vol 262 ◽  
pp. 116678 ◽  
Author(s):  
Yijun Zhao ◽  
Wenda Zhang ◽  
Dongdong Feng ◽  
Pengxiang Wang ◽  
Shaozeng Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flame Propagation ◽  
Pulverized Coal ◽  
Propagation Characteristics ◽  
Co2 Atmosphere

A rapid compression machine study of autoignition, spark-ignition and flame propagation characteristics of H2/CH4/CO/air mixtures

2018 ◽  
Vol 188 ◽  
pp. 150-161 ◽  
Author(s):  
Changpeng Liu ◽  
Heping Song ◽  
Peng Zhang ◽  
Zhi Wang ◽  
Margaret S Wooldridge ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Spark Ignition ◽  
Rapid Compression Machine ◽  
Propagation Characteristics ◽  
Rapid Compression

Pressure and flow propagation rule beyond original premixed area of methane-air in tunnel

2014 ◽  
Vol 24 (8) ◽  
pp. 1626-1635 ◽  
Author(s):  
Qi Zhang ◽  
Qiuju Ma
Keyword(s):  
Numerical Simulation ◽  
Flame Propagation ◽  
Volume Fraction ◽  
Ignition Point ◽  
Content Type ◽  
Explosion Overpressure ◽  
Air Explosion ◽  
Propagation Rule ◽  
Flow Propagation ◽  
Propagation Rules

Purpose – Whether a fire can be initiated in an explosion accident depends on the explosion and deflagration process. In the methane-air explosion in a tunnel, the flame accelerates from the ignition point. However, where it begins to decelerate is not clear. The purpose of this paper is to examine the explosion overpressure, flow and flame propagation beyond the premixed area of methane-air in a tunnel. Design/methodology/approach – The numerical simulation was used to study the explosion processes of methane-air mixtures in a tunnel. Based on the numerical simulation and its analysis, the explosion overpressure, flow and flame propagation rules beyond the premixed area were demonstrated for a methane-air explosion. Findings – The peak overpressure of methane-air mixture explosion was observed to reach its maximum beyond the original premixed area of methane-air. The hazardous effects beyond the premixed area may be stronger than those within the premixed area for a methane-air explosion in a tunnel. Under the conditions of this study, the ratio between the length of combustion area (40 m) and that of original premixed area (28 m) reaches 1.43. Originality/value – Little attention has been devoted to investigating the explosion overpressure, flow and flam propagations beyond the original premixed area of methane-air in a tunnel. Based on the numerical simulation and the analysis, the propagation rule of overpressure wave and flow inside and outside the space occupied by methane/air mixture at the volume fraction of 9.5 percent in a tunnel were obtained in this work.

Effects of ammonia on the explosion and flame propagation characteristics of methane-air mixtures

2017 ◽  
Vol 47 ◽  
pp. 120-128 ◽  
Author(s):  
Zhenmin Luo ◽  
Tao Wang ◽  
Junying Ren ◽  
Jun Deng ◽  
Chimin Shu ◽  
...  
Keyword(s):  
Flame Propagation ◽  
Propagation Characteristics
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