装有barchan沙丘涡发生器的圆柱大涡模拟

IF 2.5 3区工程技术 Q2 MECHANICS

European Journal of Mechanics B-fluids Pub Date : 2025-08-16 DOI:10.1016/j.euromechflu.2025.204347

Tao Wang, Hongyu Gao, Dahai Luo, Bingxiao Lu

{"title":"装有barchan沙丘涡发生器的圆柱大涡模拟","authors":"Tao Wang, Hongyu Gao, Dahai Luo, Bingxiao Lu","doi":"10.1016/j.euromechflu.2025.204347","DOIUrl":null,"url":null,"abstract":"<div><div>This study explores the performance of barchan dune-shaped vortex generators (BDVGs) as a passive flow control device on a circular cylinder at a Reynolds number of 3900. Using large eddy simulations (LES), the flow field around the cylinder, with BDVGs mounted symmetrically on its upper and lower surfaces, is analyzed. Two geometric configurations of BDVGs—slender (type I) and stubby (type II)—are compared to assess their effects on drag and lift coefficients across varying installation heights. The results demonstrate that BDVGs effectively reduce both the drag coefficient and the amplitude of aerodynamic force fluctuations. Notably, type II BDVGs outperform type I, achieving a maximum drag reduction of 6.17 %. Furthermore, BDVGs decrease the maximum amplitude of lift coefficient oscillations to 35.37 % of that observed for a smooth cylinder. These findings underscore the potential of BDVGs as practical and efficient solutions for aerodynamic flow control.</div></div>","PeriodicalId":11985,"journal":{"name":"European Journal of Mechanics B-fluids","volume":"114 ","pages":"Article 204347"},"PeriodicalIF":2.5000,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Large eddy simulation of a circular cylinder mounted with barchan dune-shaped vortex generators\",\"authors\":\"Tao Wang, Hongyu Gao, Dahai Luo, Bingxiao Lu\",\"doi\":\"10.1016/j.euromechflu.2025.204347\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study explores the performance of barchan dune-shaped vortex generators (BDVGs) as a passive flow control device on a circular cylinder at a Reynolds number of 3900. Using large eddy simulations (LES), the flow field around the cylinder, with BDVGs mounted symmetrically on its upper and lower surfaces, is analyzed. Two geometric configurations of BDVGs—slender (type I) and stubby (type II)—are compared to assess their effects on drag and lift coefficients across varying installation heights. The results demonstrate that BDVGs effectively reduce both the drag coefficient and the amplitude of aerodynamic force fluctuations. Notably, type II BDVGs outperform type I, achieving a maximum drag reduction of 6.17 %. Furthermore, BDVGs decrease the maximum amplitude of lift coefficient oscillations to 35.37 % of that observed for a smooth cylinder. These findings underscore the potential of BDVGs as practical and efficient solutions for aerodynamic flow control.</div></div>\",\"PeriodicalId\":11985,\"journal\":{\"name\":\"European Journal of Mechanics B-fluids\",\"volume\":\"114 \",\"pages\":\"Article 204347\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-08-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"European Journal of Mechanics B-fluids\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0997754625001281\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Mechanics B-fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0997754625001281","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

摘要

本文研究了barchan沙丘涡发生器（bdvg）在雷诺数为3900的圆柱上作为被动流动控制装置的性能。采用大涡模拟（LES）方法，对上下表面对称安装bdvg后的圆柱周围流场进行了分析。bdvgs的两种几何结构——细长型（I型）和粗短型（II型）——进行了比较，以评估它们在不同安装高度下对阻力和升力系数的影响。结果表明，bdvg能有效降低阻力系数和气动力波动幅度。值得注意的是，II型bdvg的性能优于I型，最大减阻率为6.17% %。此外，bdvg将升力系数振荡的最大振幅降低到光滑圆柱体的35.37 %。这些发现强调了bdvg作为气动流动控制的实用而有效的解决方案的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Large eddy simulation of a circular cylinder mounted with barchan dune-shaped vortex generators

This study explores the performance of barchan dune-shaped vortex generators (BDVGs) as a passive flow control device on a circular cylinder at a Reynolds number of 3900. Using large eddy simulations (LES), the flow field around the cylinder, with BDVGs mounted symmetrically on its upper and lower surfaces, is analyzed. Two geometric configurations of BDVGs—slender (type I) and stubby (type II)—are compared to assess their effects on drag and lift coefficients across varying installation heights. The results demonstrate that BDVGs effectively reduce both the drag coefficient and the amplitude of aerodynamic force fluctuations. Notably, type II BDVGs outperform type I, achieving a maximum drag reduction of 6.17 %. Furthermore, BDVGs decrease the maximum amplitude of lift coefficient oscillations to 35.37 % of that observed for a smooth cylinder. These findings underscore the potential of BDVGs as practical and efficient solutions for aerodynamic flow control.

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

European Journal of Mechanics B-fluids 物理-力学

CiteScore

5.90

自引率

3.80%

发文量

127

审稿时长

58 days

期刊介绍： The European Journal of Mechanics - B/Fluids publishes papers in all fields of fluid mechanics. Although investigations in well-established areas are within the scope of the journal, recent developments and innovative ideas are particularly welcome. Theoretical, computational and experimental papers are equally welcome. Mathematical methods, be they deterministic or stochastic, analytical or numerical, will be accepted provided they serve to clarify some identifiable problems in fluid mechanics, and provided the significance of results is explained. Similarly, experimental papers must add physical insight in to the understanding of fluid mechanics.