加速度环境下涡旋微槽传热特性实验

对矩形截面涡旋微槽试件在过载加速度环境下的传热特性进行了实验研究,所用工质为体积分数为30%的乙二醇水溶液,并由离心式恒加速度试验机为试件提供离心力来模拟所需的过载加速度环境.通过实验对不同工质流量、不同加热功率下的涡旋微槽在不同加速度条件下的传热性能进行了考察,分析了加速度环境对其传热特性的影响.结果表明:加速度方向对其传热特性有着决定性的影响,且Dean数越大,涡旋微槽适应过载加速度对其传热特性的影响的能力则越强.

Experiments of heat transfer characteristics for swirl microchannel under acceleration environment

The experiment of heat transfer characteristics in rectangular cross section swirl microchannel test pieces under acceleration environment was conducted with ethylene glycol solution of 30% (volume concentration), and the acceleration environment was simulated in test by centrifugal acceleration test machine. Heat transfer characteristics of swirl microchannel under different acceleration environment situations were investigated with various conditions of fluid flux and heating power, and the influencing factors were analyzed. The results showed that, the acceleration direction had significant effect on the heat transfer of swirl micro-channels, and the ability of swirl microchannel against the influence was as larger as the Dean number get higher.