矩形微通道流动换热特性的数值分析

Numerical Analysis on Flow and Heat Transfer Characteristics of Rectangular Micro-channel

对矩形微通道的传热和流动特性进行了三维数值模拟,结果表明:在所讨论的矩形微通道的转捩雷诺数提前到1000～1100之间,当Re>2500时,微通道内达到旺盛湍流;当量直径的变化对层流区换热Nu数影响不大,对湍流区换热Nu数有较大影响;对层流区的阻力系数影响很小,对湍流区的阻力系数影响明显,可为设计和分析微通道的性能提供理论参考。

This paper investigated heat transfer and flow characteristics of the rectangular micro-channel with three-dimensional numerical simulation, results show that： In the discussion of the rectangular micro-channel, transition Reynolds moved up to between 1000-1100, when Re〉2500, the micro-channel achieved within a strong turbulence; change of equivalent diameter have more little impact on the laminar flow and greater impact on the turbulent in the Nu number of heat transfer and drag coefficient. Theoretical reference could be provided for the design and analysis of the performance of micro-channel.