脉动流与波纹壁通道耦合强化换热及优化研究

丁耀东; 李平

doi:10.7652/xjtuxb202307011

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脉动流与波纹壁通道耦合强化换热及优化研究

—————————————————————— | 更新时间：2025-07-09

- 脉动流与波纹壁通道耦合强化换热及优化研究
- Research on Coupling of Pulsating Flow and Corrugated Channels for Heat Transfer Enhancement and Genetic Algorithm Optimization
- 西安交通大学学报 2023年57卷第7期页码：120-129
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室,西安,710049
- 作者简介：
  
  : 2022-12-07。作者简介: 丁耀东(1998—),男,硕士生
  李平(通信作者),男,副教授,博士生导师。基金项目: 国家自然科学基金资助项目(51976152)。
- 基金信息：
  
  : 2022-12-07。作者简介: 丁耀东(1998—),男,硕士生;李平(通信作者),男,副教授,博士生导师。基金项目: 国家自然科学基金资助项目(51976152)。
- DOI：10.7652/xjtuxb202307011
  中图分类号： TK124
- 网络首发：2023-07-10，
  
  纸质出版：2023
- 稿件说明：
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丁耀东, 李平. 脉动流与波纹壁通道耦合强化换热及优化研究[J]. 西安交通大学学报, 2023,57(7):120-129.

DING Yaodong, LI Ping. Research on Coupling of Pulsating Flow and Corrugated Channels for Heat Transfer Enhancement and Genetic Algorithm Optimization[J]. 2023, 57(7): 120-129.
丁耀东, 李平. 脉动流与波纹壁通道耦合强化换热及优化研究[J]. 西安交通大学学报, 2023,57(7):120-129. DOI： 10.7652/xjtuxb202307011.

DING Yaodong, LI Ping. Research on Coupling of Pulsating Flow and Corrugated Channels for Heat Transfer Enhancement and Genetic Algorithm Optimization[J]. 2023, 57(7): 120-129. DOI： 10.7652/xjtuxb202307011.

摘要

为获得节能效果良好的散热通道

并进一步提升壁面结构优化设计效率

提出将遗传算法应用于数值计算过程

建立壁面型线的数学模型。对比分析了正弦脉动流作用下弧型、正弦型和贝塞尔曲线型3类波纹壁通道内流动换热现象

实现应用遗传算法调控优化计算流程

完成了通道结构的精确、快速优化。结果表明

弧型通道的流阻最低

正弦型通道的传热增强效果最好

而贝塞尔型通道兼具适度的传热增强和流动阻力提升。当雷诺数为5 000和10 000时

贝塞尔型通道综合性能显著优于其余两类通道

相对提升均超过20%

而雷诺数增加到20 000时

通道综合性能也仅略小于弧型通道。壁面结构的添加在近壁面处激发出高湍动能区域

增强了近壁面流体与主流的传热、传质过程

近壁面高温工质被周期性地输运向主流方向。以贝塞尔型通道为优化对象

以综合性能评价指标为目标函数

建立了结合遗传算法的壁面型线快速精确优化方法。优化后的贝塞尔型结构整体趋向右后方布置

抑制了背流侧次级涡的分裂

涡结构强度得到保证。这一现象改善了背流侧的温度分布

缓解了局部过热问题

并最终实现了综合性能评价指标高达38.7%的提升。

Abstract

In order to obtain the channel enhanced heat transfer technology with good energy saving effect

the enhanced heat transfer performance mechanism and flow characteristics under the coupling effect of the corrugated channel wall profile and the inlet pulsating flow were studied. The flow and heat transfer phenomena in three kinds of corrugated channels under the sinusoidal pulsating flow were compared and analyzed. The results show that under the studied Reynolds number range

the arc channel has the lowest flow resistance

the sinusoidal channel has the best heat transfer enhancement effect

and the Bezier channel has both moderate heat transfer enhancement and flow resistance improvement. When the Reynolds number is 5 000 or 10 000

the comprehensive performance of the Bezier channel is significantly better than that of the other two kinds of channels

relatively improved by more than 20%. When the Reynolds number increases to 20 000

the comprehensive performance is only slightly smaller than that of the arc channel. The addition of the wall structure excites a high turbulent kinetic energy region near the wall

which enhances the heat and mass transfer between the fluid near the wall and the mainstream

and the high-temperature fluid near the wall is periodically transported to the mainstream. Furthermore

with the Bezier channel featuring excellent comprehensive performance selected and the comprehensive performance evaluation criterion chosen as the objective function

a fast and accurate optimization method of the wall profile based on the genetic algorithm is established. The optimization results show that the Bezier structure tends to be arranged to the right and rear is conducive to the improvement of comprehensive performance

and the improvement of the optimal channel reaches 38.7%. The change of the channel structure affects the distribution position and intensity of the secondary vortex

which further improves the temperature distribution on the downstream side and alleviates the problem of local overheating.

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