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液化气在储运过程中存在安全隐患,为分析在运输途中的液化气罐内部压力变化情况,建立液化气罐在受迫振动下的一维数学模型,分析运动过程中饱和液体和气罐的相对运动以及对罐内压力的影响。根据经验公式计算过热液中气泡的生长和消失,并用商业CFD软件CFX模拟在振动过程中罐内介质的状态变化过程,计算由于气泡的生长和消失导致的压力波动。根据这些数据进一步分析罐的振动频率和液体的填充量对汽化速率和压力波动的影响,并得出变化规律。
In order to analyze the change of pressure inside the liquefied gas tank during transportation, a one-dimensional mathematical model of liquefied gas tank under forced vibration is established, and the relationship between the relative quantity of saturated liquid and gas tank during the movement is analyzed Exercise and pressure on the tank. The growth and disappearance of bubbles in the superheated fluid were calculated according to the empirical formula. The commercial CFD software CFX was used to simulate the state change of the medium in the tank during the vibration, and the pressure fluctuation caused by the bubble growth and disappearance was calculated. Based on these data, the influence of the tank vibration frequency and the filling amount of liquid on the vaporization rate and pressure fluctuation was further analyzed and the variation rule was obtained.