摘要
实验研究了氧化铜纳米悬浮液在内径为 0 .6 8mm不锈钢细圆管内强迫流动和对流换热。氧化铜纳米颗粒悬浮液的质量分数W为 0 .0 2～ 0 .0 6 ,分别对去离子水和水 -纳米颗粒悬浮液的流动、传热特性进行了实验测定。实验结果表明 :所研究尺度下 ,层流向湍流过渡早于常规大尺度流动 ;悬浮液的压降要大于去离子水的 ;纳米颗粒的质量分数越大 ,压力降也越大 ;
In this article,experiments were conducted to investigate the single phased forced flow and convection heat trnsfer of water with copper oxide nanoparticle suspensions flowing through circular stainless steel tube.The internal diameters of the tube is 0.68 mm.The mass fractions of copper oxide nanoparticles in the experiment,w,are 0.02～0.06.The flow friction was measured and the heat transfer was ananlyzed both water and the suspensions.The experimental results show that,transitional characteristic from laminar to turbulent flow was earlier than normal sized tubes.It also indic ated that the pressure drop of copper oxide nanoparticle suspensions is higher than that of the water.Pressure drop would increase if the mass fraction of the suspensions increased.Similarly heat coefficient would increase with the increasing mass fraction of the suspensions.
出处
《工业加热》
CAS
2002年第5期1-4,共4页
Industrial Heating
基金
国家自然科学基金资助项目 (5 9995 5 5 0 - 3)
