Effect of initial temperature on free radicals of gas explosion in restricted space

The SENKIN subroutine package of CHEMKIN chemical kinetics package was used to analyze the gas explosion at three initial temperatures of 1000K, 1050K and 1100K in restricted space, based on the detailed chemical kinetics mechanism of methane combustion. The changes of explosion temperature, explosion pressure and free radicals O, H and OH generated were discussed. The results show that with elevated initial temperature, the explosion temperature increases, while the explosion pressure decreases, and the ignition delay time is shortened. Moreover, the higher the initial temperature is, the higher the mole fraction of free radicals is. © (2013) Trans Tech Publications, Switzerland.