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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.
Successfully established a fluid flow resistance and heat transfer performance test bench, at a fluid temperature of 45 ℃, the different copper particle volume fraction of the base fluid concentration of nanofluids in turbulent flow convection heat transfer characteristics and flow resistance experiments measuring. The experimental results show that the addition of nano-particles to the viscoelastic fluid base fluid can significantly improve the heat transfer performance while reducing the drag-reduction rate of the corresponding base fluid, for example, adding 1.0% by volume of copper nanoparticles to a mass fraction of 6 × The viscoelastic fluid-based nanofluids formed in 10 ~ (-4) base fluid have a comprehensive performance index K = 0.47, which shows good heat transfer enhancement and drag reduction performance.