本文是关于管内冷凝强化研究的第三份也是最后一份报告。给出了R-113在两个螺旋重复肋内粗糙管和第三个螺旋槽管中冷凝的实验结果。重复肋管的平均传热系数比光滑管的值提高了约80%，而螺旋槽管的传热系数提高了约50%（以最大内径为基础）。两种管的压降增加均小于50%。建立了重复肋骨管数据的相关性。本研究中考虑的各种增强管通过标准性能评估标准进行比较。引用:俄亥俄州辛辛那提市ASHRAE学报第87卷第2部分

This paper is the third and final report of a study on the augmentation of in-tube condensation. Experimental results are presented for condensation of R-113 in two tubes with helical repeated-rib internal roughness and for a third spirally fluted tube. The repeated-rib tubes increased average heat transfer coefficients about 80% above smooth tube values, while improvements in heat transfer coefficients for the spirally fluted tube were approximately 50% (maximum inside diameter basis). The pressure drop increase in both types of tubes was less than 50%. A correlation is developed for the repeated-rib tube data. The various augmented tubes considered in this study are compared by a standard performance evaluation criterion.