Effects of obstacle on premixed flame microstructure and flame propagation in methane/air explosion

To study the effects of the obstacle on flame propagation and flame inner structure in methane/air explosion, the effects of the mesh are studied by high speed photograph and schlieren photographs from the microscopic view, and numerical simulation is build.From the results of experiments and theoretic analysis, it shows that the obstacle wrinkles flame front surface and enlarges the turbulence intension of unburned gas before flame and flame inner flow field.The flame acceleration is improved.