不同相位差正弦型波纹通道内流动与换热特性的数值研究  

Numerical Study on the Characteristics of Flow and Heat Transfer in Wavy Channels with Different Phase Shifts

作　　者：阴继翔[1] 李国君[1] 丰镇平[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2004年第7期693-697,共5页Journal of Xi'an Jiaotong University

基　　金：国家高技术研究发展计划资助项目 (2 0 0 2AA50 3 0 2 0 ).

摘　　要：研究了流体在不同相位差的正弦型波纹通道内周期性充分发展的层流流动特征及强化换热特性,利用数值模拟方法探讨了波纹上、下板相位差对流动与换热的影响.计算结果表明:对于不同相位差的通道在当量直径与入口质量流量分别相同的条件下,流动与换热特性与Re的范围有关,上、下波纹板相位差为0°与180°时通道的阻力较高,相位差为30°时通道的阻力最低,同时也以相位差为0°时通道表面的换热速率最高,相位差为30°时通道表面的换热速率相对较低,即表面换热性能的改善要以压力损失的增大为代价.Periodically fully developed laminar flow and augment of convection heat transfer characteristics in wavy channels with different phase shifts were analyzed. The effects of the wavy upper-lower surfaces' phase shifts on the flow and heat transfer performances were numerically studied for obtaining the data of the Nusselt number and friction factor. It is found that under the conditions of the same hydraulic diameter and mass rate, the characteristics of the flow and heat transfer depend on Reynolds number. Moreover, the friction factors of 0° and 180° phase shift surfaces are greater than those of the others, while the friction factor of 30° phase shift surface is smallest. In addition, the heat transfer rate is greatest at 0° phase shift and smaller at 30° phase shift. It is concluded that the convective heat transfer enhancement is obtained with a penalty of an increased pressure loss.

关 键 词：换热强化 波纹通道 层流流动 相位差 

分 类 号：TK124[动力工程及工程热物理—工程热物理]