Abstract: ith the development and application of liquefied natural gas (LNG),the demand for spiral⁃wound LNG heat exchanger (SWHE) is increasing,and the performance of the SWHE will seriously affect the liquefaction process level.This paper built a two⁃phase convection heat transfer model and analyzed the influence of different structure parameters for SWHE.The study shows that the shell⁃side heat transfer coefficient of SWHE decreases with the increase of winding angle and longitudinal distance between tube, increases with the increase of outside tube diameter.

Key words: Spiral?wound heat exchanger, Two?phase, Shell?side, Convection, Heat transfer coefficient

摘要： 　随着LNG的发展与应用，对绕管式换热器的需求越来越大，而绕管式换热器换热性能的优劣将严重影响着液化工艺的水平。建立了绕管式换热器壳侧两相对流换热模型，利用FLUENT软件模拟分析了不同结构参数对换热器换热性能的影响。研究发现，换热器壳侧换热系数随质量流量的增大而增大，随缠绕角和换热管间距的增大而减小，随换热管管径的增大而增大。

关键词: 绕管式换热器, 两相, 壳侧, 对流, 换热系数