Experimental Study on Influence of Ignition Energy on Gas Explosion Reaction Characteristics

Abstract

Based on both the theoretical analysis and laboratory test, the influence of ignition energy on the parameters such as gas explosion pressure and ignition delay time etc. was studied in this paper. The research results show that ignition energy is linearly proportional to the gas explosion pressure and pressure increase rate; the ignition energy in the 0.1-1J range has the greatest impact on the gas explosion pressure and pressure growth rate, and in the 10-100J it is the smallest. The methane explosion of gas is essentially a process in which the C-H chemical bond breaks to form the free radical, and this process requires a lot of energy. The greater the ignition energy, the more free radicals generated by the C-H breakage and the more complete the explosion reaction, which further allows the gas explosion to be completed in a shorter time. Besides, the greater the ignition energy, the larger the heated area of ??the gas, the more gas will participate in the explosion at the same time, and then the ignition delay time of the gas explosion will be smaller. With the initial concentration of gas 10% as the optimal concentration, the delay time at the time of explosion is 37ms at the minimum, the explosion pressure can reach a maximum value of 0.713MPa, and the increase rate of explosion pressure is a maximum of 17.1MPa/s.