小通道扁管内纳米流体流动与传热特性  

FLOW AND HEANT TRANSFER PERFORMANCES OF NANOFLUIDS INSIDE SMALL HYDRAULIC DIAMETER FLAT TUBE

作　　者：李强[1] 宣益民[1] 

机构地区：[1]南京理工大学动力工程学院,江苏南京210094

出　　处：《工程热物理学报》2004年第2期305-307,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50176018);高等学校博士学科点专项科研基金(No.20020288001)

摘　　要：建立了测量小通道扁管内纳米流体流动与对流换热性能的实验系统,测量了不同粒子体积份额的水-Cu纳米 流体的管内对流换热系数和摩擦阻力系数,实验结果表明,在相同雷诺数条件下,小通道扁管内纳米流体的对流换热系数 大于纯液体,且随粒子的体积份额的增加而增大,而纳米流体的阻力系数并未明显增大。An experimental system was built to study flow and convective heat transfer features of the nanofluid flowing in a small hydraulic diameter flat tube. The convective heat transfer coefficient and the friction factor of the sample Cu-water nanofluid were measured. The experimental results showed that the nanofluid has larger heat transfer coefficient than pure water under the same Reynolds number and showed that the heat transfer feature of the nanofluid increases with the volume fraction of nanoparticles. The friction factor of the sample nanofluid with the low volume fraction of nanoparticles was almost not changed compared with that of pure water.

关 键 词：纳米流体 强化传热 小通道扁管 流动性能 对流换热性能 

分 类 号：O35[理学—流体力学] TK124[理学—力学]