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- W4290098889 endingPage "103642" @default.
- W4290098889 startingPage "103642" @default.
- W4290098889 abstract "Natural gas leaks from pipeline systems or storage sites may highly lead to a fire safety incident as well as a potential major hazard in industries or residential. The leaked jet flame commonly sheltered by an obstacle is more difficult to be extinguished as the result of a reduction in effective extinguishing agent flux and potential re-ignition. Especially in cases where the flame is heavily obscured by obstacles, the interaction of the extinguishing agent and flame can be very different from the unobstructed situation. This study aims to determine the critical characteristics of a water mist to extinguish a shielded non-premixed jet flame with the flame structure visualization of hydroxide planar laser-induced fluorescence (OH-PLIF) and quantitative parametric analysis. The effect of obstacles on water mist and a jet flame is firstly quantitatively evaluated by flame obscuration ratio kf and maximum effective mist ratio k in critical fire-extinguishing cases. Flame dynamical behavior from the base of the flame upwards to extinction is found when the flame Froude number Frf > 0.74 and kf > 0.75. Finally, the preferred water mist nozzles with larger spray angles might have more effective fire extinguishment ability typically under the cases of k < 0.5 and kf > 1.0. This study would be valuable for the optimum design of water mist systems in natural gas leakage incidents under shielded conditions." @default.
- W4290098889 created "2022-08-06" @default.
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- W4290098889 date "2022-09-01" @default.
- W4290098889 modified "2023-10-11" @default.
- W4290098889 title "Mechanism insight of shielded methane non-premixed jet flame extinction with water mist: OH-PLIF visualization and quantitative analysis of critical fire extinguishing" @default.
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- W4290098889 doi "https://doi.org/10.1016/j.firesaf.2022.103642" @default.
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