中心圆柱电极EHD强化垂直管内沸腾换热的实验研究  

EXPERIMENTAL STUDY ON EHD ENHANCEMENT OF BOILING HEAT TRANSFER IN VERTICAL TUBE BY USING COAXIAL CYLINDRICAL ELECTRODE

作　　者：刘永启[1] 李瑞阳[1] 郁鸿凌[1] 王发刚[1] 

机构地区：[1]上海理工大学动力工程学院,上海200093

出　　处：《化工学报》2004年第4期545-549,共5页CIESC Journal

基　　金：国家重点基础研究发展规划项目(No G2 0 0 0 0 2 63 0 2 );上海市基础研究重点项目 (No 0 2DJ14 0 49)~~

摘　　要：以R12 3为工质采用中心圆柱电极对垂直管内沸腾换热的EHD强化进行了实验 ,得出了沸腾传热系数与电场强度、热流密度等相关参数的关系 .测试了外加电场的电流以及击穿电场强度 .从外加电场影响气泡的成长、跃离和运动规律的角度对EHD强化垂直管内沸腾换热的机理进行了分析 .EHD enhancement of boiling heat transfer of R123 inside a vertical tube concentric with a cylindrical electrode was tested. These experiments demonstrated that the strength of applied electric field had an optimum value, under which the highest enhancements of boiling heat transfer took place at a lower heat flux and that the factors of heat transfer enhancement for a lower heat flux was larger than those for higher one. It was found that electric current increased as applied electric field strength increased and decreased as heat flux increased and that breakdown strengths of electric field fell as heat flux increased. The mechanisms of EHD enhancement of boiling heat transfer inside a vertical tube were analyzed and discussed on the view of the effect of electric field on growth rate, departure and movement behavior of bubbles.

关 键 词：电水动力学 强化换热 沸腾换热 电极形状 

分 类 号：TK124[动力工程及工程热物理—工程热物理]