An Experimental Investigation on Heat Transfer Enhancement in An Annulus with Rotating Outer Cylinder Using Nano Fluids

Q3 Environmental Science
S. M. Khalaf, A. A. Mohammed, Qasim Jabbar Mohammed
{"title":"An Experimental Investigation on Heat Transfer Enhancement in An Annulus with Rotating Outer Cylinder Using Nano Fluids","authors":"S. M. Khalaf, A. A. Mohammed, Qasim Jabbar Mohammed","doi":"10.25130/tjes.29.2.7","DOIUrl":null,"url":null,"abstract":"Heat transfer augmentation for Taylor-Couette flows between concentric cylinders have been investigated experimentally. Due to its importance and widespread in wide industrial applications such as heat exchangers, reactors, well dinning, packed beds, compressors and gas turbines, chemical industries, etc. Different variables are investigated in the present work as follow, Rayleigh number (2×106 ≤ Ra ≤ 2×107), Taylors number (0 ≤ Ta ≤ 2.4×1010), Richardson Number (0.004 ≤ Ri ≤ 0.4) and nanoparticles volume fractions(φ) of Al2O3 with water base (0 % ≤ φ ≤ 0.225 %) in which prepared in two step method.  The enhancement in heat transfer was 16.5% to 24% due to rising the concentration of Nano fluids of Al2O3-pure water from 0% to 0.225%. Also, the Nusselt number increases with increasing Rayleigh and Richardson numbers. Finally, a correlation was deduced to describe the experimental work and linked the studied parameters with difference less than 13.5 %. The comparison between experimental work and previous works found a good agreement between them.","PeriodicalId":30589,"journal":{"name":"Tikrit Journal of Engineering Sciences","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tikrit Journal of Engineering Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.25130/tjes.29.2.7","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Environmental Science","Score":null,"Total":0}
引用次数: 7

Abstract

Heat transfer augmentation for Taylor-Couette flows between concentric cylinders have been investigated experimentally. Due to its importance and widespread in wide industrial applications such as heat exchangers, reactors, well dinning, packed beds, compressors and gas turbines, chemical industries, etc. Different variables are investigated in the present work as follow, Rayleigh number (2×106 ≤ Ra ≤ 2×107), Taylors number (0 ≤ Ta ≤ 2.4×1010), Richardson Number (0.004 ≤ Ri ≤ 0.4) and nanoparticles volume fractions(φ) of Al2O3 with water base (0 % ≤ φ ≤ 0.225 %) in which prepared in two step method.  The enhancement in heat transfer was 16.5% to 24% due to rising the concentration of Nano fluids of Al2O3-pure water from 0% to 0.225%. Also, the Nusselt number increases with increasing Rayleigh and Richardson numbers. Finally, a correlation was deduced to describe the experimental work and linked the studied parameters with difference less than 13.5 %. The comparison between experimental work and previous works found a good agreement between them.
纳米流体增强旋转外筒环空传热的实验研究
实验研究了同心圆柱之间Taylor Couette流动的传热增强。由于其在换热器、反应器、井场、填充床、压缩机和燃气轮机、化学工业等广泛的工业应用中的重要性和广泛性。本工作研究了不同的变量:瑞利数(2×106≤Ra≤2×107)、泰勒数(0≤Ta≤2.4×1010),两步法制备的Al2O3的Richardson数(0.004≤Ri≤0.4)和纳米颗粒体积分数(φ)(0%≤φ≤0.225%)。由于Al2O3纯水中纳米流体的浓度从0%提高到0.225%,传热增强了16.5%-24%。此外,努塞尔数随着瑞利数和理查森数的增加而增加。最后,推导了一个描述实验工作的相关性,并将差异小于13.5%的研究参数联系起来。将实验工作与以前的工作进行比较,发现它们之间有很好的一致性。
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
CiteScore
1.50
自引率
0.00%
发文量
56
审稿时长
8 weeks
×
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:604180095
Book学术官方微信