Enhancement of Convective Heat Transfer by Using Nano-Slurry

通过实验研究了纳米浆料增强传热的作用。首先测定了水基10wt% Al_2O_3纳米浆料的热性能。浆料的导热系数比水高7%。随后测量了从加热管到纳米浆料的强制对流传热。结果表明，纳米浆料与水的努塞尔数基本一致。纳米浆料与水的碰撞射流传热也得到了相同的结果。

Enhancement of heat transfer by use of nano-slurry has been investigated experimentally. Thermal properties of water-based 10wt% Al_2O_3 nano-slurry were measured firstly. The slurry showed 7% higher thermal conductivity than that of the water. Heat transfer by the forced convection from the heated pipe to the nano-slurry was subsequently measured. The result showed that the Nusselt numbers are almost the same between the nano-slurry and water. The identical result was also obtained for the heat transfer by the impinging jet of nano-slurry and water.