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- W4323645175 abstract "Gas explosion and gas-coal dust explosion are serious disasters in coal mine production. To further study the hazards of gas explosion and gas and coal dust explosion under different conditions, experiments were done in this paper in a pipeline system containing an explosion pipeline and pressure relief pipeline. Flame propagation behavior and overpressure dynamics of gas explosion and gas coal dust explosion were analyzed. Flame propagation behavior of gas explosion and gas-coal dust explosion are divided into three stages: spherical flame, round-finger flame, and pointed-finger flame. Flame front position increases with time showing a class exponential growth trend. Flame front velocity has been increasing in the explosion pipeline. When the flame rushes out of the PVC membrane and enters the pressure relief pipeline, flame front velocity decreases slightly. The flame front velocity increases rapidly in the pressure relief pipeline. With growing gas concentration, the peak overpressure in the explosion pipeline rises at first, then decrease, and the peak overpressure in the pressure relief pipeline keeps rising. Peak overpressures are obtained at gas concentrations of 9vol% and 13vol%, respectively. When gas concentrations are 7vol% and 9vol% in the reaction, the peak overpressures in the pressure relief pipeline during gas explosion and gas-coal dust explosion are all lower than those in the explosion pipeline. When gas concentrations are 11vol% and 13vol% in the reaction, the peak overpressures in the pressure relief pipeline during the two types of explosions are higher than those in the explosion pipeline." @default.
- W4323645175 created "2023-03-10" @default.
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- W4323645175 date "2023-01-01" @default.
- W4323645175 modified "2023-10-18" @default.
- W4323645175 title "Research on deflagration behavior of gas and gas-coal dust in a vertical pressure relief pipeline system" @default.
- W4323645175 doi "https://doi.org/10.2298/tsci221104050l" @default.
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