Experimental Research on The Coupling Effect of Hole Plate Size and Initial Pressure on The Pressure of Methane-Air Explosion

Abstract

In order to study the effects of different orifice sizes and initial pressures on the explosion process of methane-air mixture, the explosion tests of methane-air mixture were carried out under different orifice sizes (16mm-160mm) and initial pressures (0kPa-50kPa) using PTB pipeline experimental device. The experimental results show that with the decrease of orifice size and the increase of initial pressure, the maximum explosion pressure of methane-air increases. The maximum explosion pressure is 5 times of the minimum explosion pressure in the limit state. The coupling effect of orifice size and initial pressure on explosion pressure is greater than effect of single factor. Finally, the influence surface is drawn to describe the relationship between the size of orifice plate and the initial pressure and the maximum explosion pressure of methane-air mixture.