Design of high-efficiency and low-resistance channels for printed circuit heat exchangers based on boundary layer redevelopment

于婷俐

doi:10.19666/j.rlfd.202411233

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Design of high-efficiency and low-resistance channels for printed circuit heat exchangers based on boundary layer redevelopment

Thermal Power Generation Vol. 54, Issue 9, Pages: 118-124(2025)

更新时间：2026-08-11

- Design of high-efficiency and low-resistance channels for printed circuit heat exchangers based on boundary layer redevelopment
- 作者机构：
  
  国能双鸭山发电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202411233
  CLC： TN41;V233
- Published：2025
- 稿件说明：
移动端阅览
[1]于婷俐.基于边界层再发展的高效低阻印刷电路板式换热器通道设计[J],2025,54(09):118-124.
[1]于婷俐.基于边界层再发展的高效低阻印刷电路板式换热器通道设计[J],2025,54(09):118-124. DOI： 10.19666/j.rlfd.202411233.

DOI：10.19666/j.rlfd.202411233.

摘要

基于微细通道印刷电路板式换热器在热力发电、航空航天等领域的应用，以及边界层再发展理论，提出了一种高效低阻且易加工的横向开槽式通道，对通道换热进行强化。采用数值模拟方法研究平直通道及开槽通道的流动传热特性，探究横向开槽通道的传热强化及流动减阻机理。结果表明：入口效应可以在较小流阻增加的前提下大幅强化传热；横向开槽通道可以在开槽区域通过流动分离实现多次入口效应，使流动边界层周期性再发展，从而大幅强化局部对流换热；开槽区域速度梯度较小，可以有效降低局部阻力。提出的横向开槽通道可使通道换热能力提升2.24%～2.59%，阻力降低6.66%～7.91%，综合换热性能提升9.87%～11.02%。

Abstract

Based on the application of micro-channel printed circuit heat exchangers in fields such as thermoelectric power generation and aerospace

a high-efficiency

low-resistance

and easy-to-manufacture transverse slotted channel is proposed using the theory of boundary layer re-development

and the heat transfer is enhanced. Numerical simulations are employed to study the flow and heat transfer characteristics of both straight and slotted channels.The mechanisms of heat transfer enhancement and flow resistance reduction in the transverse slotted channel are investigated. The results show that the entrance effect can significantly enhance heat transfer with a minimal increase in flow resistance. The transverse slotted channel creates multiple entrance effects in the slotted regions by inducing flow separation

which leads to periodic boundary layer redevelopment

thereby greatly enhancing local convective heat transfer. Additionally

due to the relatively small velocity gradient in the slotted regions

local resistance is effectively reduced. As a result

the proposed transverse slotted channel improves the heat transfer capability of the channel by 2.24%～2.59%

reduces the resistance by 6.66%～7.91%

and increases the overall heat transfer performance by 9.87%～11.02%.

关键词

Keywords

references

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