流体诱导振动强化传热的试验研究  

An Experimental Study on Augmented Heat Transfer of Elastic Coiled Tube Bundles by Flow Induced Vibration

作　　者：刘建清[1] 田茂诚[2] 程林[2] 黄素逸[1] 

机构地区：[1]华中理工大学动力工程系 [2]山东工业大学动力系

出　　处：《华中理工大学学报》1998年第11期85-87,共3页Journal of Huazhong University of Science and Technology

基　　金：山东省中青年科学家培养基金

摘　　要：通过对一种新型传热元件——弹性管束的传热试验研究发现：诱导振动加强了传热管周围的流体的扰动而达到强化传热的目的．当来流Ｒｅ＜４００时，管外对流换热系数较固定单管提高３倍以上．在换热器的不同高度上的弹性管束，换热能力随诱振方式不同而存在差异．A new method is provided to enhance the outside heat transfer coefficient of circular tubes by flow induced vibration. In the experiment, a novel heat transfer element elastic coiled tube bundles are examined which could constantly keep vibrating in crossflow of water under extremely low velocity. It is concluded that within the scope of very low Re number (less than 400), the outside heat transfer coefficient ones could be 3 times than fixed smooth ones. Meantime, the heights of the examined tube bundles in the heat exchanger have great influence on their heat transfer ability, the higher are the bundles, the less the heat transfer coefficient.

关 键 词：磁化传热 流体诱导振动 热交换 换热器 传热管 

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]