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06 October 2024 |
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Article overview
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High-Order Large-Eddy Simulations of a Wind Turbine in Ducted and Open-Rotor Configurations | | Chi Ding
; Bin Zhang
; Chunlei Liang
; Kenneth D. Visser
; Guangming Yao
; | | Date: |
1 Jun 2022 | | Abstract: | High-order large-eddy simulations are performed to study the performance and
flow field of a ducted wind turbine operating at different tip speed ratios. To
evaluate the effects of the duct, simulations with the same tip speed ratios
are also performed on the corresponding open-rotor turbine. It is found that
the ducted turbine consistently obtains higher power outputs than the
open-rotor counterpart, and the duct itself enhances flow turbulence and blade
trailing-edge vortices but weakens tip and hub vortices. Flow bifurcation is
observed at the largest tip speed ratio and is identified to be caused by blade
blockage effects. Comparative simulations are also performed on both turbines
under different yaw angles. It is noticed that the ducted configuration is
insensitive to small yaw angles and maintains higher power outputs than the
open-rotor configuration at all yaw angles. Moreover, it is observed that the
wakes of both configurations recover more quickly as the yaw angle increases. | | Source: | arXiv, 2206.00313 | | Services: | Forum | Review | PDF | Favorites | |
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