Numerical Simulation and Experimental Study on Formation of High Concentration of H₂ Generated by Gas Explosion

Abstract

In coal mine fire rescues, if the abnormal increase of gas concentration occurs, it is the primary thing to analyze the reasons and identify sources of the abnormal forming

Study on Chemical Kinetics of Explosion Caused by Pentane Leakage

“…Table 2 enumerates the symptoms of humans at different concentrations of oxygen in the air at atmospheric pressure. 11 The explosion will occur when the pentane concentration is 0.8%, and the oxygen consumption of the three types of pentane will eventually fall to 14.14%. People in this environment will at least face problems in the head, lungs, and circulatory system, not to mention the leakage of high concentrations of pentane.…”

“…The changing process of the oxygen concentration of equal compared to that for the type of mixed is the same under the stoichiometric condition, slightly shifting forward under the fuel-lean condition and slightly shifting backward under the fuel-rich condition. Table enumerates the symptoms of humans at different concentrations of oxygen in the air at atmospheric pressure . The explosion will occur when the pentane concentration is 0.8%, and the oxygen consumption of the three types of pentane will eventually fall to 14.14%.…”

“…Lei et al used chemical dynamics calculation software and a 20 L spherical explosion experimental device to simulate the generation process and formation conditions of H 2 during gas explosion. 11 The experimental results showed that the decomposition of water vapor is the main basic element reaction leading to the formation of H 2 . Free radical H is the key factor affecting the gas explosion to generate H 2 .…”

“…Especially, the explosion and deflagration parameters of various CH 4 –DME/air mixtures were systematically studied. Lei et al used chemical dynamics calculation software and a 20 L spherical explosion experimental device to simulate the generation process and formation conditions of H 2 during gas explosion . The experimental results showed that the decomposition of water vapor is the main basic element reaction leading to the formation of H 2 .…”

Influence of Roadway Cross‐Section Shape on Gas Explosion Shock Wave Law in U‐Type Ventilation Working Faces

“…Jing et al deduced the relationship between the peak value of overpressure and the gas velocity and propagation distance in the process of a gas explosion [2]. Some scholars studied the influence of various conditions (initial temperature, ignition conditions, gas concentration, and barrier type) on gas explosion parameters [3][4][5][6][7][8][9][10][11][12]. Some scholars obtained the mechanism of suppressing a gas explosion by ultrasonic water mist and a vacuum chamber through experiments and numerical simulations [13,14].…”