Effect of End Shape on Flow and Heat Transfer Characteristics of Two Parallel Plates

  • ZHANG Guang ,
  • HONG Tianxiao ,
  • WANG Dongrui ,
  • XIN Jialin ,
  • TAO Junyu ,
  • LIN Zhe
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  • Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China

网络出版日期: 2024-04-30

基金资助

This work has been supported by the National Natural Science Foundation of China (Grant No. 52222601), the Key Research and Development Program of Zhejiang Province (Grant No. 2022C03140).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Effect of End Shape on Flow and Heat Transfer Characteristics of Two Parallel Plates

  • ZHANG Guang ,
  • HONG Tianxiao ,
  • WANG Dongrui ,
  • XIN Jialin ,
  • TAO Junyu ,
  • LIN Zhe
Expand
  • Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China

Online published: 2024-04-30

Supported by

This work has been supported by the National Natural Science Foundation of China (Grant No. 52222601), the Key Research and Development Program of Zhejiang Province (Grant No. 2022C03140).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

摘要

双平板绕流属于基础流体力学问题,本文对不同端面形状的并列双平板流动与传热特性进行了数值计算。在不同倾角条件下,分析了不同端缘尺寸的倒角结构与圆角结构对并列双平板非稳态流动和传热特性的影响,结果发现,随着端缘尺寸的增加,流动的不稳定性与非定常性减弱;圆角与倒角平板的尾流速度不均匀性逐渐降低;尾流温度的不均匀性在小倾角下先增强后减弱,波动幅度在Srou(Scha)=3时最大,而在大倾角下基本保持单调增加。此外,平板的全局传热特性受端缘改型的影响明显,尤其是倒角结构,随着倒角尺寸的增加,全局努塞尔数基本呈减小趋势。该研究为平板结构在工程领域的应用提供了理论支持。

本文引用格式

ZHANG Guang , HONG Tianxiao , WANG Dongrui , XIN Jialin , TAO Junyu , LIN Zhe . Effect of End Shape on Flow and Heat Transfer Characteristics of Two Parallel Plates[J]. 热科学学报, 2024 , 33(3) : 815 -832 . DOI: 10.1007/s11630-024-1980-6

Abstract

Flow around a pair of flat plates is a basic hydrodynamics problem. In this paper, the flow and heat transfer characteristics of two parallel plates with different edge shapes are numerically calculated. Under different inclined angles, the influence of chamfered and rounded structures with different sizes at the end-edge on unsteady flow and heat transfer characteristics of two parallel plates are analyzed. It is found that the instability and unsteadiness of flow decrease with the increase of end-edge size, and the non-uniformity of wake velocity of both rounded and chamfered plates decreases gradually. The non-uniformity of wake temperature increases firstly and then decreases at a small inclined angle, and the amplitude becomes the largest when Srou(Scha)=3, while it basically keeps monotonically increasing at a large inclined angle. Moreover, the global heat transfer performance of the flat plate is obviously affected by the end-edge modification, especially the chamfered structure. With the increase of chamfered size, the global Nusselt number basically shows the decreasing trend. This study provides a theoretical basis for the application of plate-shape structure in engineering fields.

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