Investigation on flow and heat transfer characteristics and optimum structural design in the rectangular microchannels

WANG Meng; WU Hong; XU Guo-qiang; TAO Zhi; LIU Qing-dong

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Investigation on flow and heat transfer characteristics and optimum structural design in the rectangular microchannels

更新时间：2026-07-07

- Investigation on flow and heat transfer characteristics and optimum structural design in the rectangular microchannels
- Vol. 24, Issue 5, (2009)
- 作者机构：
  
  北京航空航天大学能源与动力工程学院航空发动机气动热力重点实验室,北京,100191
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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WANG Meng, WU Hong, XU Guo-qiang, et al. Investigation on flow and heat transfer characteristics and optimum structural design in the rectangular microchannels[J]. 2009, 24(5).
DOI：

WANG Meng, WU Hong, XU Guo-qiang, et al. Investigation on flow and heat transfer characteristics and optimum structural design in the rectangular microchannels[J]. 2009, 24(5). DOI：

摘要

就一组不同水力直径的矩形微小直通道进行了实验研究

并通过经验证的数值方法进行了大量CFD计算

得到了通道内流体努塞尔数和阻力系数随雷诺数变化的规律.结果表明

在所研究微小尺度范围内通道内流动的转捩雷诺数提前到1 200～1300之间

以大量数值模拟结果为样本点经过多元线形回归建立了所研究范围内微小通道流体换热与流动特性的准则关系式

并基于遗传算法

对矩形微小通道的几何结构进行了优化

为工程应用提供了依据.

Abstract

For obtaining the basic characteristic of flow and heat transfer in the rectangular microchannels

experiment was executed under different hydraulic diameters

and a great deal of numeration simulations were carried out and validated experimentally.The transformation laws of Nusselt number and resistant coeffcient were obtained.The critical Reynolds number was brought forward to about 1 200～1 300 in the studied scale range.Meanwhile

the correlation of Nusselt number and resistant coeffcient within the studied scale range were built by multivariate linear regression.The optimization procedure(genetic algorithms) was carried out to optimize the structure of microchannels

providing beneficial theoretical and experiment data for engineering application.

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Related Institution

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