冷却水中重悬浮颗粒影响沸腾传热的试验研究  

Experimental investigation of boiling heat transfer enhancement by introducing heavy particles into cooling water

作　　者：王翠苹[1] 任吉堂[2] 金建国[2] 

机构地区：[1]青岛大学机电工程学院,山东青岛266071 [2]河北理工大学冶金与能源学院,河北唐山063009

出　　处：《热科学与技术》2007年第2期131-135,共5页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(50476084)

摘　　要：试验研究了冷却水中添加氧化铁(Fe3O4/Fe2O3)颗粒在高温钢坯冷却过程中影响沸腾传热的性质。系统分析了冷却水(悬浮液)喷淋初速度、加入重颗粒的粒径、质量分数等因素对热钢坯温度下降强度、传热热流密度、沸腾传热系数、过冷沸腾长度等参数的影响,总结了冷却水中引入重悬浮颗粒用以强化沸腾传热的优化方案。An experimental investigation was carried out to enhance heat transfer efficiency in film boiling by introducing Fe3O4/Fe2O3 particles into cooling water. The main factors, such as jet velocities, particle size, particle suspension concentrations were analyzed. The results show that Fe3O4/Fe2O3 particles can be used at different wall superheat temperature. The suspension volume rate of 0. 25%-0.5%was proposed and the mean particle diameter of 40μm was optimum. The preliminary mechanism of introducing heavy particles was indicated.

关 键 词：高温冷却 重颗粒 膜状沸腾 核态沸腾 

分 类 号：TK124[动力工程及工程热物理—工程热物理]