摘要
对Dh=0.82mm的矩形微通道阵列内等温热源作用下层流传热特性进行了实验和数值模拟。实验中使用常温自来水提供等温热源。微通道流体流动雷诺数Re=100～900,传热温差50K,将所得数据与常规尺度均匀壁温加热下N-S方程的数值解法结果进行对比。结果表明,在Re<300时,Nu数随着Re数的增加而增加;而在Re>350时,实验所得Nu数近似为常数。将发展入口条件的数值模拟结果与实验结果比较,前者比后者高7.2%。
An experimental and numerical simulation were performed of the heat exchange characteristics of the laminar flow in an array of rectangular micro-passages with a diameter of Dh=0.82 mm under the action of an isothermal heat source. During the test,running water at a normal temperature served as an isothermal heat source. The Reynolds number of fluid flow in the micro-passages ranged from 100 to 900 and the temperature difference for the heat transfer was 50 K.A comparison of the data thus obtained with the ...
出处
《热能动力工程》
CAS
CSCD
北大核心
2010年第3期306-311,358-359,共8页
Journal of Engineering for Thermal Energy and Power
关键词
微通道热沉
液体冷却
强化换热
单相流动
层流流动
micro-passage heat sink
liquid cooling
intensified heat exchange
single-phase flow
laminar flow
