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用一种新算法对饱和蒸汽沿水平管外轴向流动凝结换热进行了求解。得到了液膜厚度与轴向坐标（ｚ）和周向坐标（）的数值关系。结果表明，用这种算法比原算法得到的结果更准确，为工程实际应用提供了更为准确的理论指导。
A new algorithm is used to solve the problem of the saturated steam heat transfer along the axial flow outside the horizontal tube. The relationship between the film thickness and the axial coordinate (z) and the circumferential coordinate () is obtained. The results show that using this algorithm is more accurate than the original one, which provides more accurate theoretical guidance for the practical application of the project.