Large-eddy simulation on the similarity between wakes of wind turbines with different yaw angles

Li, Zhaobin; Yang, Xiaolei

doi:10.1017/jfm.2021.495

Cited by 49 publications

(25 citation statements)

References 75 publications

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“…2016; Foti et al. 2018 a , b ; Mao & Sørensen 2018; Gupta & Wan 2019; Li & Yang 2021), but its generation mechanism is still not fully understood. For the wind turbine and propeller wake, some previous investigations hypothesized that global meandering is ascribed to hub vortex distortions (Felli et al.…”

Section: Wake Field Analysismentioning

confidence: 99%

“…Rotor devices (e.g. propellers, wind and tidal turbines) that are initially designed to operate under uniform and axisymmetric flow are sometimes required to work in off-design conditions for manoeuvring (Felli & Falchi 2018; Huang, Qin & Pan 2022) or optimal energy extraction (Li & Yang 2021; Borg et al. 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Analogously, in a large wind farm, to avoid the unfavourable wake interaction between two wind turbines, an active yaw control strategy has been adopted to deflect the upstream turbine wakes away from the downwind turbines and to increase the total power production of the wind turbine array (Bastankhah & Porté-Agel 2016; Zong & Porté-Agel 2020; Bossuyt et al. 2021; Li & Yang 2021). In this context, a deeper understanding of rotor wake dynamics and evolution mechanisms in an oblique flow is vital for optimizing rotor design and formulating control strategies.…”

Section: Introductionmentioning

confidence: 99%

“…2015; Bastankhah & Porté-Agel 2017; Foti et al. 2018 a ; Foti, Yang & Sotiropoulos 2018 b ; Mao & Sørensen 2018; Yang & Sotiropoulos 2019; Li & Yang 2021). The misalignment of upstream wind turbine wakes with downstream turbines has attracted considerable attention as this strategy can effectively reduce the power losses caused by wake meandering (Bastankhah & Porté-Agel 2016; Micallef & Sant 2016; Foti et al.…”

Section: Introductionmentioning

confidence: 99%

“…2019; Zong & Porté-Agel 2020; Bossuyt et al. 2021; Li & Yang 2021). Some literature has documented that wake meandering is related to the long-wave instability of the hub vortex (Felli et al.…”

Section: Introductionmentioning

confidence: 99%

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Effects of a nozzle on the propeller wake in an oblique flow using modal analysis

et al. 2023

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The effect of a nozzle on the wake dynamics of a four-bladed propeller operating in an oblique flow is investigated via modal decomposition and flow visualization of the results obtained from numerical simulations using delayed detached eddy simulations. The wake characteristics and destabilization mechanisms of a non-ducted propeller (NP) and ducted propeller (DP) in axisymmetric and oblique flow conditions are systematically analysed. The wake characteristics on the windward side are very different from those on the leeward side in an oblique flow, and the nozzle has a crucial role in mitigating the asymmetry and weakening the wake deflection. More destabilization mechanisms are present in an oblique flow than in an axisymmetric flow, including the asymmetric evolution and destabilization of the helixes on the windward and leeward sides of the NP wake, the interaction between the vortex shedding and the helixes in the DP leeward region, and the generation of a tube-shaped wake envelope around the nozzle and its rolling-up. Moreover, the effect of the nozzle on wake meandering is discussed based on modal analysis.

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Section: Wake Field Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of a nozzle on the propeller wake in an oblique flow using modal analysis

et al. 2023

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Nonuniform dependence on initial data for the 2D viscous shallow water equations

Zhu

2022

Z Angew Math Mech

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The failure of uniform dependence on the data is an interesting property of classical solution for a hyperbolic system. In this paper, we consider the solution map of the Cauchy problem to the 2D viscous shallow water equations, which is a hyperbolic-parabolic system. We give a new approach to studying the issue of nonuniform dependence on initial data for these equations. We prove that the solution map of this problem is not uniformly continuous in Sobolev spaces 𝐻 𝑠 × 𝐻 𝑠 for 𝑠 > 2.

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Well-posedness and continuity properties of the Degasperis-Procesi equation in critical Besov space

Zhu

2022

Monatsh Math

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Large-eddy simulation on the similarity between wakes of wind turbines with different yaw angles

Abstract: Abstract

Cited by 49 publications

References 75 publications

Effects of a nozzle on the propeller wake in an oblique flow using modal analysis

Effects of a nozzle on the propeller wake in an oblique flow using modal analysis

Nonuniform dependence on initial data for the 2D viscous shallow water equations

Well-posedness and continuity properties of the Degasperis-Procesi equation in critical Besov space

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