三个并排气缸后不等间距气缸周围的流体流量控制

IF 1.8 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Shams-ul-Islam, Bai Mbye Cham, Zia-ul-Islam, Naveed Sheikh
{"title":"三个并排气缸后不等间距气缸周围的流体流量控制","authors":"Shams-ul-Islam, Bai Mbye Cham, Zia-ul-Islam, Naveed Sheikh","doi":"10.1007/s40430-024-05186-1","DOIUrl":null,"url":null,"abstract":"<p>A numerical study was carried out to systematically investigate the effect of downstream attached splitter plates on the flow around three unequal spacing side-by-side arranged cylinders at the Reynolds number of 150. The lattice Boltzmann method and finite difference successive over-relaxation method are used simultaneously for the solution of the Navier–Stokes equations, in the formulation where the vorticity and the stream function are the field variables. Sixteen different unequal spacing combinations were chosen. The length of the downstream attached splitter plates is 1<i>D</i>, 2<i>D</i>, and 3<i>D</i>. In the case of a flip-flopping flow pattern without splitter plates, more than one peak was found in the power spectra. This study shows that downstream attached splitter plates reduce drag forces. A comparison is made between the cases with and without splitter plates in terms of the time histories of the drag and lift forces, vortex formation mechanisms, and dominant frequencies. The vortex patterns and downstream evolution are also discussed in detail using vorticity contours visualization. Power spectra analysis and fluid forces were presented upon reaching a steady state. Flow characteristics and fluid force coefficients change considerably with the addition of downstream attached splitter plates.</p>","PeriodicalId":17252,"journal":{"name":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","volume":"59 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fluid flow control around unequal cylinder spacing behind three side-by-side cylinders\",\"authors\":\"Shams-ul-Islam, Bai Mbye Cham, Zia-ul-Islam, Naveed Sheikh\",\"doi\":\"10.1007/s40430-024-05186-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>A numerical study was carried out to systematically investigate the effect of downstream attached splitter plates on the flow around three unequal spacing side-by-side arranged cylinders at the Reynolds number of 150. The lattice Boltzmann method and finite difference successive over-relaxation method are used simultaneously for the solution of the Navier–Stokes equations, in the formulation where the vorticity and the stream function are the field variables. Sixteen different unequal spacing combinations were chosen. The length of the downstream attached splitter plates is 1<i>D</i>, 2<i>D</i>, and 3<i>D</i>. In the case of a flip-flopping flow pattern without splitter plates, more than one peak was found in the power spectra. This study shows that downstream attached splitter plates reduce drag forces. A comparison is made between the cases with and without splitter plates in terms of the time histories of the drag and lift forces, vortex formation mechanisms, and dominant frequencies. The vortex patterns and downstream evolution are also discussed in detail using vorticity contours visualization. Power spectra analysis and fluid forces were presented upon reaching a steady state. Flow characteristics and fluid force coefficients change considerably with the addition of downstream attached splitter plates.</p>\",\"PeriodicalId\":17252,\"journal\":{\"name\":\"Journal of The Brazilian Society of Mechanical Sciences and Engineering\",\"volume\":\"59 1\",\"pages\":\"\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The Brazilian Society of Mechanical Sciences and Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s40430-024-05186-1\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Brazilian Society of Mechanical Sciences and Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s40430-024-05186-1","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

摘要

通过数值研究,系统地探讨了在雷诺数为 150 时,下游附着的分流板对三个不等间距并排圆柱体周围流动的影响。在以涡度和流函数为场变量的公式中,同时使用晶格玻尔兹曼法和有限差分连续过度松弛法求解纳维-斯托克斯方程。选择了 16 种不同的不等间距组合。下游附着分流板的长度为一维、二维和三维。在没有分流板的翻转流动模式中,功率谱中出现了一个以上的峰值。这项研究表明,下游附着的分流板可减少阻力。从阻力和升力的时间历程、漩涡形成机制和主要频率方面,对有分流板和无分流板的情况进行了比较。此外,还利用涡度等值线可视化技术详细讨论了涡流模式和下游演变情况。功率谱分析和流体力在达到稳定状态时的表现。随着下游分流板的增加,流动特性和流体力系数发生了很大变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Fluid flow control around unequal cylinder spacing behind three side-by-side cylinders

Fluid flow control around unequal cylinder spacing behind three side-by-side cylinders

A numerical study was carried out to systematically investigate the effect of downstream attached splitter plates on the flow around three unequal spacing side-by-side arranged cylinders at the Reynolds number of 150. The lattice Boltzmann method and finite difference successive over-relaxation method are used simultaneously for the solution of the Navier–Stokes equations, in the formulation where the vorticity and the stream function are the field variables. Sixteen different unequal spacing combinations were chosen. The length of the downstream attached splitter plates is 1D, 2D, and 3D. In the case of a flip-flopping flow pattern without splitter plates, more than one peak was found in the power spectra. This study shows that downstream attached splitter plates reduce drag forces. A comparison is made between the cases with and without splitter plates in terms of the time histories of the drag and lift forces, vortex formation mechanisms, and dominant frequencies. The vortex patterns and downstream evolution are also discussed in detail using vorticity contours visualization. Power spectra analysis and fluid forces were presented upon reaching a steady state. Flow characteristics and fluid force coefficients change considerably with the addition of downstream attached splitter plates.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
3.60
自引率
13.60%
发文量
536
审稿时长
4.8 months
期刊介绍: The Journal of the Brazilian Society of Mechanical Sciences and Engineering publishes manuscripts on research, development and design related to science and technology in Mechanical Engineering. It is an interdisciplinary journal with interfaces to other branches of Engineering, as well as with Physics and Applied Mathematics. The Journal accepts manuscripts in four different formats: Full Length Articles, Review Articles, Book Reviews and Letters to the Editor. Interfaces with other branches of engineering, along with physics, applied mathematics and more Presents manuscripts on research, development and design related to science and technology in mechanical engineering.
×
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