管内Cu-水微米颗粒流湍流强化传热研究  

Turbulent flow and enhanced heat transfer induced by Cu-water microfluid in tube

作　　者：王涛[1,2] 金伟娅 高增梁[1] 肖俊建[2] 陶薇 汤剑 WANG Tao;JIN Weiya;GAO Zengliang;XIAO Junjian;TAO Wei;TANG Jian(Institute of Process Equipment & Control Engineering, Zhejiang University of Technology, Hangzhou 310032,China;College of Mechanical Engineering,Quzhou University,Quzhou 324000,China)

机构地区：[1]浙江工业大学化工机械设计研究所,杭州310032 [2]衢州学院机械工程学院,浙江衢州324000

出　　处：《振动与冲击》2018年第5期108-113,共6页Journal of Vibration and Shock

基　　金：浙江省公益技术研究工业项目(2015C31133)

摘　　要：传统光管在高雷诺数下的传热效果不理想,因此提出在水介质中添加微米Cu颗粒作为工作介质来强化管内换热的方法。建立了Cu-水微米流的多相流传热物理模型,采用基于颗粒动力学的欧拉-欧拉双流体模型,对粒径分别为10μm、50μm、100μm和500μm,流速分别为1 m/s、1.5 m/s、2 m/s和2.5 m/s,颗粒体积分数分别为5%、10%、15%和20%进行了传热Nu和阻力损失f数值计算,结果表明:Cu-水微米流的努塞尔数Nu随雷诺数Re和颗粒体积分数的增大而增大,而随粒径的增大而总体趋势减小;摩擦因子f随颗粒体积分数的增大而增大,而随雷诺数Re增大而增小;传热综合性能评价因子η随颗粒体积分数的增大而增大,随着粒径的增大而总体趋势减小。粒径10μm的传热综合性能在研究的粒径范围内最佳,η达到1.1~2.3。Aiming at unideal heat transfer effect of traditional plain tubes under high Reynolds number,a method taking water with micro-Cu particles added as working medium to enhance heat transfer in plain tubes was proposed.The multiphase flow heat transfer model of Cu-water microfluid was established.The heat transfer Nu and friction factor f were computed by using Euler-Euler2-fluid model based on the particle dynamics under different particle diameters of10μm,50μm,100μm and500μm,flow velocity of1m/s,1.5m/s,2m/s and2.5m/s,and particle volume fraction of5%,10%,15%and20%.The results indicated that Nusselt number(Nu)of Cu-water microfluid increases with increase in Reynolds number and particle volume fraction,and decreases with increase in particle diameter;the friction factor f increases with increase in particle volume fraction,and decreases with increase in Reynolds number;the heat transfer comprehensive performance evaluation factorηincreases with increase in particle volume fraction,and decreases with increase in particle diameter;the heat transfer comprehensive performance of particles with diameter of10μm is the best within the studied range of particle diameter,ηreaches1.1to2.3.

关 键 词：Cu-水微米流 双欧拉流体模型 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]