Experimental Study on the Flame Propagation Speed and Overpressure under Obstacles

By prolonging the transparent organic glass tube,the flame propagation velocity and overpressure are researched under obstacles.The result shows that obstacles increase the flame propagation velocity and overpressuret,he velocity increases quickly at 20 times L/D ratio.The closer the gas concentration to the stoichiometrical ratio,the more obvious the accelerating effect of the obstacles on the flame velocity and overpressure.These results may be useful in the field of preventing and controlling combustible gas explosion.