脉动流下贝塞尔曲线型波纹壁通道流动传热特性研究

丁耀东; 刘真威; 李平

doi:10.7652/xjtuxb202209020

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脉动流下贝塞尔曲线型波纹壁通道流动传热特性研究

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

- 脉动流下贝塞尔曲线型波纹壁通道流动传热特性研究
- Flow and Heat Transfer Characteristics of Bezier-Curve Shaped Corrugated Channel Under Pulsating Flow
- 西安交通大学学报 2022年56卷第9期页码：185-194
- 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：
  
  : 2022-04-25。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：
  
  : 2022-04-25。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/xjtuxb202209020
  中图分类号： TK124
- 网络首发：2022-09-10，
  
  纸质出版：2022
- 稿件说明：
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丁耀东, 刘真威, 李平. 脉动流下贝塞尔曲线型波纹壁通道流动传热特性研究[J]. 西安交通大学学报, 2022,56(9):185-194.

DING Yaodong, LIU Zhenwei, LI Ping. Flow and Heat Transfer Characteristics of Bezier-Curve Shaped Corrugated Channel Under Pulsating Flow[J]. 2022, 56(9): 185-194.
丁耀东, 刘真威, 李平. 脉动流下贝塞尔曲线型波纹壁通道流动传热特性研究[J]. 西安交通大学学报, 2022,56(9):185-194. DOI： 10.7652/xjtuxb202209020.

DING Yaodong, LIU Zhenwei, LI Ping. Flow and Heat Transfer Characteristics of Bezier-Curve Shaped Corrugated Channel Under Pulsating Flow[J]. 2022, 56(9): 185-194. DOI： 10.7652/xjtuxb202209020.

摘要

为探究波纹壁结构和脉动流耦合作用下通道内流动强化换热的时空效应

基于贝塞尔曲线线型多变、灵活、易控制的优势

设计出3种壁面型线的波纹壁通道

并对比分析了3种波纹壁通道在不同流动及脉动参数下的流动换热特性以及设计因素的作用机理。研究结果表明:湍流状态下(雷诺数为5 000、10 000和20 000)

迎流面积最小的模型2通道流动阻力最小

同时具有凹陷和凸起结构的模型4通道强化换热效果最佳; 随脉动频率(2～20 Hz)的增加

3种模型通道的综合热性能先增再减

而随着脉动振幅(0.1～0.9)的增加

3种模型通道的综合热性能先增加再小幅度减小; 在脉动流和壁面结构的共同作用下

热边界层的发展在结构单元尺度范围内被进一步破坏

高温工质区域沿流向间断分布。脉动流下波纹壁通道内流体扰动的时空耦合效应显著提升了通道综合热性能

为解决狭窄通道内部过热问题提供有效的途径。

Abstract

To study the spatiotemporal effect of heat transfer enhancement in the channel under the coupling effect of corrugated structure and pulsating flow

three kinds of corrugated wall channels are designed based on the advantages of changeability

flexibility and easiness to control of Bezier curves in this study and their flow and heat transfer characteristics under different flow and pulsation parameters and the mechanism of design factors are compared and analyzed. The results show that under turbulent flow conditions(Re=5 000

10 000

and 20 000)

the model 2 channel with the smallest head-on area has the smallest flow resistance

and the model 4 channel with concave and convex structures has the best heat transfer enhancement effect. With the increase of the pulsation frequency(2-20 Hz)

the comprehensive thermal performance of the three model channels first increases and then decreases. And with the increase of the pulsation amplitude(0.1-0.9)

the comprehensive thermal performance of the three model channels first increases and then slightly decreases. Under the combined impact of the pulsating flow and the wall structure

the development of the thermal boundary layer is further destroyed within the scale of the structural unit

and the high-temperature working fluid region is discontinuously distributed along the flow direction. The spatiotemporal coupling effect of fluid disturbance in the corrugated wall channel under pulsating flow significantly improves the comprehensive thermal performance of the channel

and provides an effective way to solve the problem of overheating in the narrow channel.

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references

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