Experimental Study and Analysis of Turbulent Natural Convection at Isothermal Vertical Plate

IF 1.3 4区 工程技术 Q3 ENGINEERING, MECHANICAL
A. G. Kirdyashkin, A. A. Kirdyashkin
{"title":"Experimental Study and Analysis of Turbulent Natural Convection at Isothermal Vertical Plate","authors":"A. G. Kirdyashkin,&nbsp;A. A. Kirdyashkin","doi":"10.1134/S1810232823040082","DOIUrl":null,"url":null,"abstract":"<p>Turbulent natural convection at isothermal vertical plate is studied experimentally for Prandtl number Pr = 13.5–15. The results of an experimental investigation of time-averaged temperature and velocity fields as well as of shear stress and heat transfer rate in turbulent boundary layer are presented. The thickness of viscous and conduction sublayers is determined. The dependence of these thicknesses on the process parameters for Pr = 13.5–15 is found. The statistical characteristics of the turbulent boundary layer <span>\\(\\left( {\\left( {\\overline {{u}'^2} } \\right)^{1/2},\\left( {\\overline {{T}'^2} } \\right)^{1/2}} \\right)\\)</span> are obtained. According to the experimental data, the law of variation of the viscous sublayer thickness is found. The laws of variation of the thickness of dynamic and thermal boundary layers are established. The wall shear stress and the shear stress variation across the boundary layer are determined. It has been found experimentally that the flow in the outer part of the boundary layer has a jet character.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"32 4","pages":"736 - 757"},"PeriodicalIF":1.3000,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Engineering Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S1810232823040082","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0

Abstract

Turbulent natural convection at isothermal vertical plate is studied experimentally for Prandtl number Pr = 13.5–15. The results of an experimental investigation of time-averaged temperature and velocity fields as well as of shear stress and heat transfer rate in turbulent boundary layer are presented. The thickness of viscous and conduction sublayers is determined. The dependence of these thicknesses on the process parameters for Pr = 13.5–15 is found. The statistical characteristics of the turbulent boundary layer \(\left( {\left( {\overline {{u}'^2} } \right)^{1/2},\left( {\overline {{T}'^2} } \right)^{1/2}} \right)\) are obtained. According to the experimental data, the law of variation of the viscous sublayer thickness is found. The laws of variation of the thickness of dynamic and thermal boundary layers are established. The wall shear stress and the shear stress variation across the boundary layer are determined. It has been found experimentally that the flow in the outer part of the boundary layer has a jet character.

Abstract Image

Abstract Image

等温垂直板湍流自然对流的实验研究与分析
实验研究了等温垂直板在普朗特数 Pr = 13.5-15 时的湍流自然对流。实验研究了时间平均温度场和速度场,以及湍流边界层中的剪应力和传热率。确定了粘滞层和传导层的厚度。在 Pr = 13.5-15 的条件下,这些厚度与工艺参数的关系被确定下来。湍流边界层的统计特征((\left( {\overline {{u}'^2} } \right)^{1/2},\left( {\overline {{T}'^2} } \right)^{1/2}}\right)\) 得到。根据实验数据,找到了粘性子层厚度的变化规律。建立了动边界层和热边界层厚度的变化规律。确定了整个边界层的壁面剪应力和剪应力变化。实验发现,边界层外侧的流动具有喷流特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Journal of Engineering Thermophysics
Journal of Engineering Thermophysics THERMODYNAMICS-ENGINEERING, MECHANICAL
CiteScore
2.30
自引率
12.50%
发文量
0
审稿时长
3 months
期刊介绍: Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信