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Title:
Lattice Boltzmann simulations of a pitch-up and pitch-down maneuver of a chord-wise flexible wing in a free stream flow
Author: Qi, Dewei1; He, Guowei2; Liu, Yingming3
Source: PHYSICS OF FLUIDS
Issued Date: 2014-02-01
Volume: 26, Issue:2, Pages:21902
Abstract: A rapid pitch-up and pitch-down maneuver of a chord-wise flexible wing in a steady free stream is studied by using a lattice Boltzmann flexible particle method in a three-dimensional space at a chord based Reynolds number of 100. The pitching rates, flexibility, and wing density are systematically varied, and their effects on aerodynamic forces are investigated. It is demonstrated that the flexibility can be utilized to significantly improve lift forces. The flexible wing has a larger angular momentum due to elasticity and inertia and generates a larger leading edge vortex as compared with a rigid wing. Such lift enhancement occurs mainly during the pitch-down motion while a large stall angle is produced during the pitch-up motion. At a low pitch rate, the flexibility cannot improve lift. (C) 2014 AIP Publishing LLC.
English Abstract: A rapid pitch-up and pitch-down maneuver of a chord-wise flexible wing in a steady free stream is studied by using a lattice Boltzmann flexible particle method in a three-dimensional space at a chord based Reynolds number of 100. The pitching rates, flexibility, and wing density are systematically varied, and their effects on aerodynamic forces are investigated. It is demonstrated that the flexibility can be utilized to significantly improve lift forces. The flexible wing has a larger angular momentum due to elasticity and inertia and generates a larger leading edge vortex as compared with a rigid wing. Such lift enhancement occurs mainly during the pitch-down motion while a large stall angle is produced during the pitch-up motion. At a low pitch rate, the flexibility cannot improve lift. (C) 2014 AIP Publishing LLC.
Keyword: Three-point velocity correlation ; Turbulence ; Large Eddy Simulation ; Velocity increment ; Multiscale analysis
Language: 英语
Indexed Type: SCI
Corresponding Author: Qi, DW (reprint author), Western Michigan Univ, Dept Chem & Paper Engn, Kalamazoo, MI 49008 USA.
Correspondent Email: dewei.qi@wmich.edu
DOI: 10.1063/1.4866182
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Mechanics ; Physics, Fluids & Plasmas
WOS Subject Extended: Mechanics ; Physics
WOS Keyword Plus: INSECT FLIGHT
WOS ID: WOS:000332322000004
ISSN: 1070-6631
Funder: National Science Foundation (NSF)(1126438) ; National Natural Science Foundation of China (NNSFC)(11232011) ; National Basic Research Program of China (973 Program)(2013CB834100)
Rank: [Qi, Dewei] Western Michigan Univ, Dept Chem & Paper Engn, Kalamazoo, MI 49008 USA; [He, Guowei] Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China; [Liu, Yingming] Sichuan Univ, Yangtze Ctr Math, Chengdu 610064, Peoples R China
Subject: Mechanics; Physics
Department: LNM湍流
Classification: 一类/力学重要期刊
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/48781
Appears in Collections:非线性力学国家重点实验室_期刊论文

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description.institution: 1.Western Michigan Univ, Dept Chem & Paper Engn, Kalamazoo, MI 49008 USA
2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China
3.Sichuan Univ, Yangtze Ctr Math, Chengdu 610064, Peoples R China

Recommended Citation:
Qi, Dewei,He, Guowei,Liu, Yingming. Lattice Boltzmann simulations of a pitch-up and pitch-down maneuver of a chord-wise flexible wing in a free stream flow[J]. PHYSICS OF FLUIDS,2014-02-01,26(2):21902.
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