减阻流体添加碳纳米管后的流动换热特性

Flow Drag and Heat Transfer Performances of Drag-reducing Fluid with Carbon Nanotubes Added

提出了一种新型纳米流体的的概念,该纳米流体既有减阻流体的减阻特性,又因为添加了碳纳米管(CNT)而具有很好的的强化换热特性.探索合适的配比组分和配制工艺,试制了带有减阻特性的水基碳纳米管纳米流体(悬浮液),测定了其热物理和流变特性.试验表明,液温对减阻特性和换热特性都有强烈影响;添加CNT前后的减阻流体的减阻性能基本不变,但传热性能明显提高;使用带有减阻特性的纳米流体能够提高强制对流的综合换热特性或进一步提高纳米流体的强化传热特性.

A new kind of drag-reducing liquid was developed,which has not only the dragreducing characteristics,but also the enhanced heat transfer characteristics,because of adding carbon nanotubes（CNT） into the base fluid.In this study,the base fluid was pure water;the drag-reducing additive CTAC （cetyltrimethyl ammonium chloride） and multi wall CNT were added to the base fluid to make drag-reducing fluids.The production process was developed,the appropriate composition fraction was found,and the thermal and rheological properties were measured.The test indicates that the fluid temperature has a strong influence on the drag-reducing and heat transfer characteristics.The drag-reducing characteristics does not change after the addition of CNT,but the heat transfer characteristics have been greatly enhanced.The enhanced heat transfer technology of nanofluid can be used to solve the heat transfer deterioration problem of pure dragreducing fluid.