粗糙管换热器带自旋流的复合强化传热技术  

Technique of compound heat transfer enhancement with self-sustaining swirl flow and rough tubes

作　　者：邓先和[1] 洪蒙纳[1] 

机构地区：[1]华南理工大学化工与能源学院传热强化与过程节能教育部重点实验室,广东广州510640

出　　处：《化工进展》2007年第10期1400-1403,共4页Chemical Industry and Engineering Progress

基　　金：国家重点基础研究发展规划(973)项目(No.G200026301);国家自然科学基金(No.20776046)

摘　　要：介绍了粗糙管换热器中沿传热管轴向间隔分置旋流片的两区协同强化传热方法。旋流片使流体产生螺旋流,螺旋流在离开旋流片之后依靠自身的运动惯性保持一定距离的自旋流,对管道近壁区与中心区产生互动的协同传热强化。此外,该方法也可用于管间,除了对管间管束的机械支撑外,旋流片也可使管间流体产生自旋运动,实现壳程流体的两区协同传热强化。对现有工业系统的换热器技术升级、实现节能降耗意义重大。A method of synergistic heat transfer enhancement in two zones with serf-sustaining swirl flow in rough tube heat exchanger is presented in this paper. Rough tubes combined with axially spaced twisted-tape elements inside the tube are used to enhance heat transfer of heat exchangers. Swirl flow is generated by twisted-tape elements and a self-sustaining swirl flow at a definite distance is maintained in the space between two twisted-tape elements owing to the rotational motion inertia. It has a complementary synergism in enhancement of heat transfer in the near-wall range and the center range of the tube. Alternatively, spaced twisted-tape elements can be used as both supports of tube bundle and enhancement element by producing self-sustaining swirl flow in the shell side. It is believed that the compound heat transfer enhancement with self-sustaining swirl flow and rough tubes is of great significance for the renovation of heat exchangers, energy conservation and decrease of energy consumption.

关 键 词：粗糙传热管 旋流片轴向间隔分置 复合强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK172[动力工程及工程热物理—热能工程]