Influence of different explosion venting positions on methane/air explosion characteristics

In order to study the influence of the explosion venting position on the explosion characteristics of methane/air premixed gas, the experimental study on the explosion characteristics of methane/air premixed gas with different explosion venting positions was carried out using the gas explosion experimental platform. The results show that: with the increase of the distance between the explosion vent and the ignition source, the peak speed of explosion flame propagation increases gradually. Except for the condition where the explosion vent is 750 mm away from the ignition source, the peak explosion pressure also varies with the explosion vent and the ignition source. The maximum flame propagation velocity and explosion peak pressure can be generated by the methane/air premixed gas under the experimental conditions that the distance between the explosion vent is 1000 mm from the ignition source, and the peak velocity and pressure are 20.25 m/s and 225.56 kPa. The closer the explosion vent is to the ignition source, the lower the explosion risk of the methane/air mixture in the pipeline. The research results can provide theoretical basis for the design of pressure relief position.