波动前缘对机翼失速延迟效应的研究

A. Skillen, A. Revell, J. Favier, A. Pinelli, U. Piomelli
{"title":"波动前缘对机翼失速延迟效应的研究","authors":"A. Skillen, A. Revell, J. Favier, A. Pinelli, U. Piomelli","doi":"10.1615/tsfp8.1960","DOIUrl":null,"url":null,"abstract":"We present LES simulations of the flow over a wing with sinusoidal leading edge undulations. The undulations act as a passive flow control device, offering superior poststall aerodynamic performance relative to the unmodified wing with the same mean chord. The baseline case of a regular wing is also presented for comparison. In all cases the Reynolds number based on bulk velocity and mean chord is equal to 120,000, and the angle of attack is set to 20◦. The study explores the details of the flow physics and the mechanisms by which the post-stall aerodynamic benefit is gained. For the particular set of geometrical and aerodynamic parameters considered, a hitherto unreported physical mechanism by which the undulation offers their benefit is observed. This increased understanding of the flow physics for the current configuration is an important step towards a more general understanding and the incorporation of the technology into practical designs. Potential applications include vertical axis wind turbines, unmanned air vehicles, helicopter blades, and canard surfaces; the present Reynolds number is of particular relevance to the first two of these applications. Introduction Inspired by the high maneuverability of the humpback whale, there has been a surge in interest in the mammal’s hydrodynamic performance, with a view towards capitalising on findings in the field of biomimetics. A key contributing factor to this high maneuverability is the form of the pectoral flippers; specifically the presence of protuberances A","PeriodicalId":206337,"journal":{"name":"Proceeding of Eighth International Symposium on Turbulence and Shear Flow Phenomena","volume":"217 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2013-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":"{\"title\":\"INVESTIGATION OF WING STALL DELAY EFFECT DUE TO AN UNDULATING LEADING EDGE: AN LES STUDY\",\"authors\":\"A. Skillen, A. Revell, J. Favier, A. Pinelli, U. Piomelli\",\"doi\":\"10.1615/tsfp8.1960\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We present LES simulations of the flow over a wing with sinusoidal leading edge undulations. The undulations act as a passive flow control device, offering superior poststall aerodynamic performance relative to the unmodified wing with the same mean chord. The baseline case of a regular wing is also presented for comparison. In all cases the Reynolds number based on bulk velocity and mean chord is equal to 120,000, and the angle of attack is set to 20◦. The study explores the details of the flow physics and the mechanisms by which the post-stall aerodynamic benefit is gained. For the particular set of geometrical and aerodynamic parameters considered, a hitherto unreported physical mechanism by which the undulation offers their benefit is observed. This increased understanding of the flow physics for the current configuration is an important step towards a more general understanding and the incorporation of the technology into practical designs. Potential applications include vertical axis wind turbines, unmanned air vehicles, helicopter blades, and canard surfaces; the present Reynolds number is of particular relevance to the first two of these applications. Introduction Inspired by the high maneuverability of the humpback whale, there has been a surge in interest in the mammal’s hydrodynamic performance, with a view towards capitalising on findings in the field of biomimetics. A key contributing factor to this high maneuverability is the form of the pectoral flippers; specifically the presence of protuberances A\",\"PeriodicalId\":206337,\"journal\":{\"name\":\"Proceeding of Eighth International Symposium on Turbulence and Shear Flow Phenomena\",\"volume\":\"217 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2013-08-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceeding of Eighth International Symposium on Turbulence and Shear Flow Phenomena\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1615/tsfp8.1960\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceeding of Eighth International Symposium on Turbulence and Shear Flow Phenomena","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1615/tsfp8.1960","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11

摘要

我们提出了具有正弦前缘波动的机翼流动的LES模拟。波动作为一种被动的流动控制装置,提供了优越的失速后气动性能相对于未修改的机翼与相同的平均弦。常规机翼的基线情况也提出了比较。在所有情况下,基于体速度和平均弦的雷诺数都等于120,000,攻角设置为20◦。该研究探讨了流动物理的细节和失速后气动效益获得的机制。对于所考虑的一组特殊的几何和空气动力学参数,观察到迄今未报道的波动提供其好处的物理机制。对当前配置的流动物理特性的进一步了解是朝着更全面的理解和将该技术纳入实际设计的重要一步。潜在的应用包括垂直轴风力涡轮机、无人飞行器、直升机叶片和鸭翼表面;目前的雷诺数与前两种应用特别相关。受座头鲸高机动性的启发,人们对哺乳动物的水动力性能产生了浓厚的兴趣,并希望利用仿生学领域的发现。这种高机动性的一个关键因素是胸鳍的形状;具体地说,突出物的存在
本文章由计算机程序翻译,如有差异,请以英文原文为准。
INVESTIGATION OF WING STALL DELAY EFFECT DUE TO AN UNDULATING LEADING EDGE: AN LES STUDY
We present LES simulations of the flow over a wing with sinusoidal leading edge undulations. The undulations act as a passive flow control device, offering superior poststall aerodynamic performance relative to the unmodified wing with the same mean chord. The baseline case of a regular wing is also presented for comparison. In all cases the Reynolds number based on bulk velocity and mean chord is equal to 120,000, and the angle of attack is set to 20◦. The study explores the details of the flow physics and the mechanisms by which the post-stall aerodynamic benefit is gained. For the particular set of geometrical and aerodynamic parameters considered, a hitherto unreported physical mechanism by which the undulation offers their benefit is observed. This increased understanding of the flow physics for the current configuration is an important step towards a more general understanding and the incorporation of the technology into practical designs. Potential applications include vertical axis wind turbines, unmanned air vehicles, helicopter blades, and canard surfaces; the present Reynolds number is of particular relevance to the first two of these applications. Introduction Inspired by the high maneuverability of the humpback whale, there has been a surge in interest in the mammal’s hydrodynamic performance, with a view towards capitalising on findings in the field of biomimetics. A key contributing factor to this high maneuverability is the form of the pectoral flippers; specifically the presence of protuberances A
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
自引率
0.00%
发文量
0
×
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