LNG接收站槽车泄漏扩散规律FLACS模拟研究OA

Liquefied natural gas(LNG)is one of the important clean energy sources;however,it is prone to leakage and explosion accidents during storage and transportation,resulting in serious damage.This paper focuses on an LNG receiving terminal and systematically investigates the diffusion patterns of LNG under various factors during tanker operations,such as wind speed,leak diameter,and leak direc-tion,using numerical simulation methods.The results show that wind speed is the dominant factor af-fecting liquid pool evaporation and vapor cloud diffusion.An increase in wind speed significantly accel-erates liquid pool evaporation and drives the vapor cloud to drift along the wind direction.Under a wind speed of 40 m/s,the equivalent gas-liquid volume decreases by up to 99.6％and 91.1％compared to that under no-wind condition.The leak diameter is positively correlated with the maximum diffusion distance under the explosion lower limit,and the diffusion direction is significantly affected by wind speed.The furthest diffusion distances along the wind direction(+X)and perpendicular to the wind di-rection toward the terminal boundary(-Y)both increase with the leak diameter.Additionally,the vapor cloud concentration increases with height.The findings further enhance the safe transportation of LNG tankers and effectively improving preventive measures against leakage accidents and reducing safety risks during transportation.