摘要
成功建立了流体流动阻力和换热性能测试实验台,在45℃的流体温度下,对不同铜粒子体积分数和基液浓度的纳米流体在湍流状态下的对流换热特性和流动阻力进行了实验测量。实验结果表明:黏弹性流体基液中添加纳米粒子后,在降低对应基液减阻率的同时能明显增强传热性能.例如,将1.0%体积分数的铜纳米粒子添加到质量分数为6×10^(-4)的基液中所形成的黏弹性流体基纳米流体其综合性能指数K=0.47,表现了很好的传热强化和减阻性能.
An experimental facility was established to study the characteristics of convective heat transfer and liquid flow resistance. The characteristics of heat transfer and flow resistance were investigated through experiments for nanofluids with different volume fraction of copper nanoparticles and different mass concentration of base fluid at turbulent state at 45℃. The experimental results show that the heat transfer ability was enhanced by adding copper nanoparticles for viscoelastic base fluid, while only a little drag reduction of viscoelastic base fluid was reduced. For example, when adding copper nanopartilces with 1.0% volume fraction into viscoelastic base fluid with mass fraction of 6×10-4 to form a stable viscoelastic fluid based nanofluid, the comprehensive quality index K is 0.47, which means an excellent heat transfer enhancement and drag reducing property.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第2期366-370,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51076036
No.51121004)
哈尔滨工业大学基础研究杰出人才培育计划项目(No.HIT.BRET1.2010008)
关键词
黏弹性流体基铜纳米流体
减阻率
传热恶化率
综合特性
viscoelastic fluid based copper nanofluid
drag reduction
heat transfer reduction
comprehensive quality
