管内旋流场综合性能研究进展

针对目前换热设备的强化传热和防除垢问题，介绍了管内插入物、表面凹槽以及复合强化传热等几种管内旋流技术。管内插入物可破坏流体边界层，实现在线自动防除垢和强化传热，但插入物本身易因磨损导致换热效率下降；表面凹槽技术可对管内外流体实现双向传热，流体阻力与其它技术相比较小，但制造工艺相对复杂；复合强化传热技术传热能力较高，可综合各种传热技术的优点，且综合性能要比单一技术要高。对以上几种主要管内旋流技术进行分析比较，并提出未来管内旋流技术的主要发展趋势将以复合强化传热技术为主。

Research development of comprehensive performance of rotational flow field in tube

This paper introduced research developments in heat transfer enhancement and tube fouling prevention in the rotational flow tube. New technologies mainly include tube tension，surface groove，and compound heat transfer enhancement. Tube insertion can break boundary layer and achieve online anti-scaling and descaling automatically，however it is difficult to maintain constant heat exchanger efficiency due to normal wear on the wall. Surface groove can achieve heat transfer enhancement in and out of the tube，it also has relatively low fluid resistance，but the manufacturing process is complex. Compound heat transfer enhancement has high heat transfer capacities and the advantages of various heat transfer technologies，and its overall performances can be higher than one kind of technique. Thus compound heat transfer enhancement can be a prospective technology for future applications.