Numerical simulation and study on the transmission law of flame and pressure wave of pipeline gas explosion

Based on FLUENT simulation software, the laws of transmission of flame and pressure wave in pipeline gas explosion were studied. It turned out that, the maximum pressure value of the explosion point is not the maximum value of the whole explosion process; the maximum pressure value of the pressure wave lowers firstly near the explosion point, then rises to a peak, and then drops gradually; two waves divide the space in the pipeline into three sections during the gas explosion transmission. The result is basically consistent between numerical simulation and experiment, and the conclusion from the simulation provides theoretical basis for research on explosion-proof and suppression devices for underground gas pipeline, as well as for technical regulations of installation.

► Transmission laws in pipeline gas explosion were studied.
► The maximum pressure value lowers firstly near the explosion point.
► Then it rises to a peak, and finally drops gradually.
► Two waves divide the pipeline space into three sections.
► The simulation result is basically consistent with the experiment result.