Open Access
ARTICLE
A Numerical Study of the Tip Wake of a Wind Turbine Impeller Using Extended Proper Orthogonal Decomposition
Weimin Wu, Chuande Zhou*
School of Mechanical and Power Engineering, Chongqing University of Science & Technology, Chongqing, 401331, China
* Corresponding Author: Chuande Zhou. Email:
(This article belongs to this Special Issue: EFD and Heat Transfer II)
Fluid Dynamics & Materials Processing 2020, 16(5), 883-901. https://doi.org/10.32604/fdmp.2020.010407
Received 03 March 2020; Accepted 23 July 2020; Issue published 09 October 2020
Abstract
The behavior of the tip wake of a wind turbine is one of the hot issues
in the wind power field. This problem can partially be tackled using Computational Fluid Dynamics (CFD). However, this approach lacks the ability to provide
insights into the spatial structure of important high-order flows. Therefore, with
the horizontal axis wind turbine as the main focus, in this work, firstly, we conduct CFD simulations of the wind turbine in order to obtain a data-driven basis
relating to multiple working conditions for further analysis. Then, these data
are studied using an extended Proper Orthogonal Decomposition (POD) algorithm. The quantitative results indicate that the tip vortex in the wake has a complicated spatio-temporal morphological configuration in the higher-order extended
POD space. The radial velocity modes obtained are effective and credible, and
such reconstructed flow of the tip vortex becomes clearer with the increase of
the reconstruction orders. Interestingly, the changes of relatively high-order correlation coefficients are essentially affected by the periodic fusion of tip and central
eddies in the wake.
Keywords
Cite This Article
Wu, W., Zhou, C. (2020). A Numerical Study of the Tip Wake of a Wind Turbine Impeller Using Extended Proper Orthogonal Decomposition.
FDMP-Fluid Dynamics & Materials Processing, 16(5), 883–901.