文档介绍：第 45 卷第 3 期机械工程学报 Vol . 45
2009 年 3 月 JOURNAL OF MECHANICAL ENGINEERING Mar. 2009
DOI:.
强化单相对流换热的基本机制*
何雅玲陶文铨
(西安交通大学动力工程多相流国家重点实验室西安 710049)
摘要:对强化对流换热的强化机制研究的进展做了回顾与综述,包括:①将场协同原理从抛物形流动推广到椭圆形流动。
②通过数值模拟与试验的手段,对场协同原理进行了多方面的验证,特别是设计了专门的试验台,验证了当流速与流体的
温度梯度方向垂直时流体流动对该方向的热量传递没有贡献。③用数值分析实例论证了场协同原理能将现有文献中三种关
于强化传热的解释统一起来,从而是一种最基本的强化传热的机制。④应用场协同原理开发了两种高效强化传热结构,它
们与基本结构相比,具有传热强化的倍率高于阻力增加的比的特点。最后提出了场协同原理需要进一步研究的内容。
关键词:强化换热场协同迁移过程数值模拟试验研究
中图分类号:TK124
Fundamental Mechanism of Enhancing Single-phase
Convective Heat Transfer
HE Yaling TAO Wenquan
(State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049)
Abstract:The recent developments in the study on heat transfer enhancement are reviewed and summarized. These include:① The
field synergy principle has been extended from parabolic flow to elliptic flow which is more often than not encountered in
engineering. ② Validation of the field synergy principle has been performed via numerical and experimental methods for a number
of cases, especially a specific test rig has been designed to demonstrate that when the flow direction is normal to the fluid temperature
gradient, the flow and its velocity has nothing to do with the heat transfer in that direction. ③ It has been demonstrated via
numerical examples that the field synergy principle can unify all the existing three explanations of convective heat transfer, hence it is
the most fundamental mechanism for enhancing single-phase convective heat transfer. ④ Two examples of enhanced heat transfer
configurations are presented which are deigned by applying the filed synergy principle and are characterized by the fact that the
enhanced ratio of heat transfer is larger than the ratio of friction factor pared with the reference configuration. Finally
some research needs in the filed synergy principle are proposed.
Key words:Heat transfer enhancement