添加筛网增强减阻流体传热性能的实验研究

本文对添加多种型式金属筛网后不同浓度及配比下减阻流体的传热及湍流特性进行了实验研究,对比分析了不同工况下减阻流体的压损率（PL）及传热增强率（HTE）,从而得到减阻流体传热及湍流特性的变化情况。研究结果表明：管道添加筛网后,在低雷诺数（Re）区,PL明显高于HTE;当雷诺数很低时,添加筛网不能改变减阻流体的传热性能,但雷诺数超过3.25×104时,添加筛网后其传热性能明显增强;相同雷诺数下浓度越高,筛网对胶束的破坏程度就越小,当雷诺数达到4.5×104时,其传热性能才开始增强;不同配比和浓度的减阻流体在相应临界雷诺数附近性能最佳。本文可为流体远距离输送、区域供热供冷等工程应用领域的节能降耗技术提供有力参考。

Experimental Research on Heat Transfer Performance of Decrease-resistance Liquid through Appending Cribrose Net

The flow and heat transfer property of diverse concentration and proportioning Decrease-Resistance Liquid in the planar channel appended several Cribrose Net were researched in this paper.Furthermore,the increased resistance ratio and the increased heat transfer ratio were compared.The results show that the PL was obviously bigger than the HTE in a low Reynolds number level.The heat transfer performance can not be enhanced when the Reynolds number was less than 3.25×104.Under the same Reynolds number,higher concentration results in less destroying to colloid fluid and the heat transfer performance was reinforced when Reynolds number was more than 4.5×104.Decrease-Resistance Liquid of different concentration and proportioning behaved perfectly near the critical Reynolds number.The results in this paper could offer references for energy conservation technology in the practical project of remote liquid transportation,territorial heat and cool providing fields.