Initial Condition Dependence of Methane/Air Mixture Explosion Temperature and Overpressure

摘要

The initial reaction temperature and pressure have evident influence on explosion parameters. On the basis of the aerodynamics analysis of methane explosion, this paper simulates the influence of initial reaction temperature and pressure on explosion temperature and peak overpressure by the k- ε model. The simulation results are analyzed by the method of least squares. The results indicate that there is a linear correlation between the initial temperature and explosion temperature. And one negative exponential correlation between the initial temperature and peak explosion overpressure is introduced. There exists a linear correlation between the initial reaction pressure and the peak explosion overpressure. At the same tine, the initial pressure has little effect at the explosion temperature. The initial reaction condition also has a considerable influence on the maximum overpressure rising speed.