本文是管内冷凝强化研究的第二份报告。用R-113对光滑管、带有两个不同螺距的扭带插入件的光滑管和三个内翅片管进行了测试。在标称面积的基础上，扭带插入物的总平均传热系数比光滑管的总平均传热系数提高了约30%。对于三个内翅片管，翅片最短和数量最多的管性能最好，传热系数提高了120%。这两种强化技术都建立了传热和压降关联式。 这些相关性为目前的实验结果提供了合理的描述。翅片管关联式与之前报告的蒸汽关联式不一致；给出了这种行为的定性原因。引文:加利福尼亚州洛杉矶ASHRAE Transactions第86卷第1部分

This paper is the second report of a study of the augmentation of in-tube condensation. A smooth tube, the smooth tube with two different pitch twisted-tape inserts, and three internally finned tubes were tested with R-113. The twisted-tape inserts increased overall average heat transfer coefficients approximately 30% above those of the smooth tube on a nominal area basis. For the three internally finned tubes, the one with the shortest and largest number of fins had the best performance, with heat transfer coefficients increased up to 120%. Heat transfer and pressure drop correlations were developed for both augmentation techniques. These correlations provide reasonable descriptions of the present experimental results. The finned-tube correlation does not agree with the steam correlation reported previously; qualitative reasons for this behavior are given.