中文摘要：

通过实验验证了由滚压—犁切/挤压工艺加工成形的三维整体外翅片管相对于光管的强化传热性能.实验表明,三维翅片管的管外传热系数是光管的6～10倍.从热力学的观点出发对三维翅片管的强化传热原理进行了探讨,结论显示翅片间的毛细结构是影响传热性能的主要因素.同时,该结论表明加工参数之一的进给量和三维翅片管传热性能之间存在影响关系,进给量越大,传热性能越差.

英文摘要：

Compared with the smooth tube, three-dimensional finned tubes machined by rolling and plowing/extruding method can show improved heat transfer performance and this is experimentally verified. It is shown that the shell-side heat transfer coefficient of three-dimensional finned tube is 6-10 times larger than that of smooth tube. The heat transfer enhancement mechanism of three-dimensional finned tube is also given and it is the capillary structure that contributes to the heat transfer enhancement from the point of the view of thermodynamic theory. Meanwhile, the relationship between the heat transfer performance of three-dimensional finned tube and the processing parameter, feed, is revealed. The larger the feed is, the smaller the shell-side heat transfer coefficient is.