摇摆状态下垂直管内TFE/NMP降膜吸收数值模拟

根据船用条件下吸收器内溶液降膜吸收的特点，建立了摇摆状态下垂直管内TFE（2，2，2-trifluoroethanol,三氟乙醇)/NMP（N-methyl-2-pyrrolidone,甲基吡咯烷酮）降膜吸收过程中动量、热量和质量传递的物理和数学模型.模型中充分考虑了转动附加惯性力对降膜流场中液膜厚度、速度、温度和浓度分布的影响.采用膜内积分与全隐式有限容积相结合的数值方法求解理论模型.通过对计算结果的分析发现，在摇摆状态下TFE/NMP降膜吸收过程中，转动附加惯性力的存在使得速度和温度等状态参数的分布具有一定周期性和对称性.

Numerical simulation of falling film absorption in swaying tube using TFE/NMP as working fluid

Based on the features of the falling film absorption in the absorbers used on boats, a physical and mathematical model of momentum,heat and mass transfer of falling film absorption in a swaying tube using TFE/NMP (2,2,2-trifluoroethanol/N-methyl-2-pyrrolidone)as working fluid was presented.The effects of swaying additional inertia forces on the distributions of film thickness,velocity,temperature and concentration of falling film flow field were fully considered. A combination of integral and completely implicit finite volume numerical method was adopted to solve the governing equations.By analyzing the computation results, it could be found that the distributions of the parameters such as velocity and temperature and so on,took on the traits of periodicity and symmetry due to the existence of the swaying additional inertia forces during the falling film absorption in the swaying absorber with TFE/NMP solution.