中文版 | English
Title

基于模态分解的风力机尾迹特征研究

Alternative Title
Spatial-Temporal Evolution Characteristics of Wind Turbine Wake Based on Mode Decomposition Method
Author
Publication Years
2022
DOI
Source Title
ISSN
0254-0053
Volume43Issue:4Pages:896-907
Abstract
水平轴风力机的尾迹对风电性能和下游风力机疲劳载荷有重要影响.本文采用致动线模型(Actuator line method,ALM)的大涡模拟方法(Large-eddy simulation,LES)研究了 NREL-5MW风力机尾迹的时空演化特征.从获得的瞬时场可以看出叶尖涡向下游发展后变成涡环,涡环失稳产生大量涡丝,涡丝重连生成小尺度涡环,小尺度涡环进一步破碎成更小的湍流结构.从平均场可以看出来流经过风力机后,速度发生台阶式降低,速度亏损剖面形状为W形.随着尾迹向下游发展,尾迹速度逐渐恢复且湍流强度逐渐增大,直至风力机后5个转子直径处速度亏损剖面的形状变为U形,但湍流强度的峰值开始降低.通过本征正交分解方法(Proper orthogonal decomposition,POD)和动力学模态分解方法(Dynamic mode decomposition,DMD)分析发现,风力机尾迹演化过程中叶片旋转的相关模态、涡环模态都可以被很好地捕捉到.
Keywords
URL[Source Record]
Language
Chinese
SUSTech Authorship
Others
Funding Project
11972220:国家自然科学基金 ; 2019B121203001:广东省重点实验室基金
Data Source
WanFang
WanFangID
lxjk202204016
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/525046
DepartmentSouthern University of Science and Technology
Affiliation
1.上海大学力学与工程科学学院,上海200444
2.上海市应用数学和力学研究所,上海200444
3.南方科技大学广东省湍流基础研究与应用重点实验室,广东深圳518055
Recommended Citation
GB/T 7714
刘明,王伯福. 基于模态分解的风力机尾迹特征研究[J]. 力学季刊,2022,43(4):896-907.
APA
刘明,&王伯福.(2022).基于模态分解的风力机尾迹特征研究.力学季刊,43(4),896-907.
MLA
刘明,et al."基于模态分解的风力机尾迹特征研究".力学季刊 43.4(2022):896-907.
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