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中间介质气化器(Intermediate Fluid Vaporizer,IFV)是浮式LNG接收站关键设备之一,由于容易受到海上风浪影响,IFV内部的液位波动会影响设备的换热性能。采用三维数值模拟方法,结合Fluent计算软件,编写了非稳态晃荡边界条件,对IFV内部中间介质腔内液体的晃荡运动进行了模拟。分析了不同晃荡幅度、晃荡频率及中间介质的充灌液位对介质腔内液位波动的影响。研究表明:当晃荡角度在3°~10°之间、晃荡频率在0.1~1 Hz之间时,中间介质充灌量的安全液位为50%;中间介质液面随晃荡角度的增加,晃荡周期的减小,液面波动愈加剧烈。研究结果为LNG的安全输送提供了借鉴与参考。
Intermediate Fluid Vaporizer (IFV) is one of the key equipment of floating LNG receiving station. Fluctuation of liquid level in IFV can affect the heat exchange performance of the equipment due to its susceptibility to the effects of wind and wave at sea. Using three-dimensional numerical simulation method and Fluent calculation software, unsteady sloshing boundary conditions were programmed to simulate the sloshing motion of liquid in the IFV internal intermediate chamber. The influence of different sloshing amplitude, sloshing frequency and the filling level of the intermediate medium on the liquid level fluctuation in the medium chamber was analyzed. The results show that when the sloshing angle is between 3 ° and 10 ° and the sloshing frequency is between 0.1 and 1 Hz, the safety level of the intermediate medium filling is 50%. As the sloshing angle increases, the medium level sloshing Cycle decreases, the liquid surface more and more volatile. The results provide a reference for the safe transportation of LNG.