A new method for simulating multiple wind turbine wakes under yawed conditions
Wei, Dezhi and Zhao, Weiwen and Wan, Decheng and Xiao, Qing (2021) A new method for simulating multiple wind turbine wakes under yawed conditions. Ocean Engineering, 239. 109832. ISSN 0029-8018 (https://doi.org/10.1016/j.oceaneng.2021.109832)
Preview |
Text.
Filename: Wei_etal_OE_2022_A_new_method_for_simulating_multiple_wind_turbine_wakes_under_yawed_conditions.pdf
Accepted Author Manuscript License: Download (3MB)| Preview |
Abstract
Counter-rotating vortices generated in wake steering not only deform the turbine wake, but also can make the wake trajectory of a non-yawed downwind turbine deviate from its rotor centerline, referred to as "secondary wake steering" phenomenon. Recent studies have also shown that the vortex interactions become clearer when the wind farm includes multiple turbines. However, in the common analytical models for active yaw control, the effects of these vortices are not considered. Evidently, this omission can lead to a decrease in model prediction accuracy. To compensate for it, a new analytical wind farm model is proposed. It adopts a physical-based momentum conserving wake superposition method to deal with the interaction of multiple wakes, in which, not only combining the streamwise velocity deficit of each individual yawed wind turbine, but also the transverse velocity from different wakes. Additionally, an "added yaw angle" is defined for a downwind turbine operating in upstream yawed turbine wakes, to reflect the change in local wind direction it perceives. For validation purposes, the LES wind field obtained from the SOWFA tool is used as a reference, and the newly proposed model is found to agree well with LES results and outperforms the representative conventional analytical model in almost all test cases. The new model can successfully reproduce the "secondary wake steering" phenomenon in the overlapped wake, and provides significant improvements in predicting power production of wind turbines.
ORCID iDs
Wei, Dezhi, Zhao, Weiwen, Wan, Decheng and Xiao, Qing ORCID: https://orcid.org/0000-0001-8512-5299;-
-
Item type: Article ID code: 80264 Dates: DateEvent1 November 2021Published20 September 2021Published Online10 September 2021AcceptedSubjects: Technology > Hydraulic engineering. Ocean engineering Department: Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering Depositing user: Pure Administrator Date deposited: 21 Apr 2022 15:32 Last modified: 11 Nov 2024 13:27 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/80264