Effect of different initial pressures on induced combustion characteristics of Hydrogen-Air Pre-Mixture

A mesh plate was set in the upper part of constant volume combustion chamber, and schlieren method and pressure acquisition systems were used to analyse flame propagation characteristics and pressure characteristics when hydrogen-air pre-mixture flame traverses mesh plate under different initial pressures. Experimental results show jet stream when hydrogen-air pre-mixture flame traverses the mesh plate, and the flame among mesh is interfered mutually. The flame-front area increases and flame is induced into the turbulent combustion. Maximum explosion pressure before and after adding the mesh plate do not change. Addition of mesh plate will advance the time of maximum pressure arriving and shorten the combustion duration. After flame passes through the mesh plate, propagation velocity and pressure rising rate increase simultaneously. With the increase of initial pressure, the change rate of combustion duration after adding mesh plate increases first and then decreases, and gives its maximum at initial pressure of 0.10, MPa.