壁温周期振荡条件下方腔内纳米流体自然对流换热研究  

Wall Temperature Cycle Oscillation Condition Below the Lumen Nanofluids Natural Convective Heat Transfer Research

作　　者：韩喜莲[1] 李超[2] 孟曦[3] 马兵善[1] 

机构地区：[1]兰州理工大学土木工程学院,兰州730050 [2]兰州理工大学石油化工学院,兰州730050 [3]四川大学建筑与环境学院,成都610065

出　　处：《制冷与空调（四川）》2016年第4期393-399,共7页Refrigeration and Air Conditioning

基　　金：甘肃省自然科学基金1508RJZA109;国家自然科学基金51266006

摘　　要：对充满Cu-水纳米流体方腔内的非稳态自然对流换热进行了数值研究。综合研究了不同振荡波形下,纳米颗粒的体积份额和振荡波幅A对自然对流换热的影响。结果表明:在水中添加Cu纳米颗粒可以强化水的自然对流换热;体积份额和振荡波幅A的增大都加强纳米流体自然对流换热,但是不同振荡波形,加强程度不同并提出振荡面积S的概念,即振荡波形与其平均值围成的面积,曲线拟合显示时均努塞尔特数Nu随S增大呈指数曲线上升。The full of Cu-water nanofluids the unsteady natural convection heat transfer in a square cavity numerical study. Comprehensive research under different oscillation waveform, the volume of nanoparticles share φ and oscillation amplitude Aimpact on natural convection heat transfer. The results showed that adding Cu nanoparticles in water can strengthen the natural convection heat transfer in a water; φ volume share and the increase of oscillation amplitude A strengthening nanofluids natural convection heat transfer, but different oscillation waveform, strengthening degree and puts forward the concept of oscillation in S, namely the oscillation waveform into the area, with its average curve fitting showed the nusselt number increases with S exponential curve.

关 键 词：纳米流体 振荡面积 数值模拟 自然对流 

分 类 号：TU86[建筑科学]