Experimental analysis of the wake dynamics of a modelled wind turbine during yaw manoeuvres

Macrì, S.; Coupiac, Olivier; Girard, Nicolas; Leroy, A.; Aubrun, Sandrine

doi:10.1088/1742-6596/1037/7/072035

Cited by 6 publications

(10 citation statements)

References 12 publications

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“…To this end, this study deals with a typical scenario of wake interaction between two wind turbines which is reproduced to investigate the effects of the yaw control strategy, paying particular attention to the WT wake and load dynamics. This work continues and completes the investigations already performed in a previous study (Macrì et al (2018)) and aimed to characterise the wake and load response to the yaw variation. It is based on an experimental approach conducted in low-speed wind tunnels.…”

Section: Introductionsupporting

confidence: 74%

“…More details about the measurement systems will be given in the following sections. Regarding the flow characteristics, in HIT conditions, turbulence grids were installed at the entrance of the main test section of the two wind tunnels in order to generate the desired turbulence characteristics as in Macrì et al (2018). The reference wind speeds U ref , as well as the turbulence intensities in the empty field (no disc) at the disc location (I U up ) and at the Stereo PIV measurement plane (I U down ) are summarized in Table 2.…”

Section: Wind Tunnels and Flow Conditionsmentioning

confidence: 99%

“…-In Macrì et al (2018), present authors made some comparisons between similar experimental results and wake deviation empirical models. The trends were similar but the models systematically overestimated the wake deviation compared to experimental values.…”

Section: Several General Comments Can Be Madementioning

confidence: 99%

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Experimental investigation of wind turbine wake and load dynamics during yaw manoeuvres

Macrí¹,

Aubrun²,

Leroy³

et al. 2020

Preprint

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Abstract. This paper investigates the effect of yawing a wind turbine on its wake deviation dynamics and on the global load variation of a downstream wind turbine during a positive and negative yaw manoeuvre, representing a misalignment/realignment scenario. Yaw manoeuvres could be used to voluntarily misalign wind turbines when wake steering control is targeted. The aim of this wind farm control strategy, which is increasingly studied, is to optimize the overall production of the wind farm and possibly its lifetime, by mitigating wake interactions. Whereas wake flow and wind turbine load dynamics during yaw manoeuvres are usually approached by quasi-static models, the present study aims at quantifying dynamical properties of these phenomena. Wind tunnel experiments were conducted in three different configurations, varying both scaling and flow conditions, in which the yaw manoeuvre was reproduced in a homogeneous turbulent flow at two different scales, and in a more realistic flow such as a modelled atmospheric boundary layer. The effects of yaw control on the wake deviation were investigated by the use of stereo Particle Imaging Velocimetry while the load variation on a downstream wind turbine was measured through an unsteady aerodynamic load balance. While overall results show a non dependence of the wake and load dynamics on the flow conditions and Reynolds scales, they highlight an influence of the yaw manoeuvre direction on their temporal dynamics.

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Section: Introductionsupporting

confidence: 74%

Section: Wind Tunnels and Flow Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation of wind turbine wake and load dynamics during yaw manoeuvres

Macrí¹,

Aubrun²,

Leroy³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…To this end, this study deals with a typical scenario of wake interaction between two wind turbines which is reproduced to investigate the effects of the yaw control strategy, paying particular attention to the WT wake and load dynamics. This work continues and completes the investigations already performed in a previous study (Macrì et al, 2018) and aims to characterize the wake and load response to the yaw variation. It is based on an experimental approach conducted in low-speed wind tunnels.…”

Section: Introductionsupporting

confidence: 69%

“…Regarding the flow characteristics, in HIT conditions, turbulence grids were installed at the entrance of the main test section of the two wind tunnels in order to generate the desired turbulence characteristics as in Macrì et al (2018). The reference wind speeds U ref , as well as the turbulence intensities in the empty field (no disc) at the disc location (I U up ) and at the stereo-PIV measurement plane (I U down ), are summarized in Table 2.…”

Section: Wind Tunnels and Flow Conditionsmentioning

confidence: 99%

Experimental investigation of wind turbine wake and load dynamics during yaw maneuvers

et al. 2021

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Abstract. This article investigates the far wake response of a yawing upstream wind turbine and its impact on the global load variation in a downstream wind turbine. In order to represent misalignment and realignment scenarios, the upstream wind turbine was subjected to positive and negative yaw maneuvers. Yaw maneuvers could be used to voluntarily misalign wind turbines when wake steering control is targeted. The aim of this wind farm control strategy is to optimize the overall production of the wind farm and possibly its lifetime, by mitigating wake interactions. While wake flow and wind turbine load modifications during yaw maneuvers are usually described by quasi-static approaches, the present study aims at quantifying the main transient characteristics of these phenomena. Wind tunnel experiments were conducted in three different configurations, varying both scaling and flow conditions, in which the yaw maneuver was reproduced in a homogeneous turbulent flow at two different scales and in a more realistic flow such as a modeled atmospheric boundary layer. The effects of yaw control on the wake deviation were investigated by the use of stereo particle imaging velocimetry while the load variation on a downstream wind turbine was measured through an unsteady aerodynamic load balance. While overall results show a nondependence of the wake and load dynamics on the flow conditions and Reynolds scales, they highlight an influence of the yaw maneuver direction on their temporal dynamics.

show abstract

Experimental investigation of wind turbine wake dynamics during yaw variation

Macrì

Aubrun

Leroy

et al. 2020

J. Phys.: Conf. Ser.

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This work focuses on the analysis of the wake dynamics during yaw manoeuvres. Farm control is becoming always more crucial and voluntary misalignment is one valuable strategy employed to optimize the overall production. Indeed, the appropriate misalignment of a wind turbine can improve the rate of production and the lifetime of the downstream one, and if properly applied, could also improve the overall farm production. The main objective of this work is to analyze the wake deviation dynamics consequent to an imposed yaw manoeuvre strategy. The analysis is performed through wind tunnel experiments and the wake deviation is captured and measured using Particle Imaging Velocimetry. First, the yaw manoeuvre is reproduced in a homogeneous and isotropic turbulent flow and second, in a more realistic atmospheric boundary layer condition. Results show a different behaviour of the wake according to the imposed yaw manoeuvre.

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Experimental analysis of the wake dynamics of a modelled wind turbine during yaw manoeuvres

Cited by 6 publications

References 12 publications

Experimental investigation of wind turbine wake and load dynamics during yaw manoeuvres

Experimental investigation of wind turbine wake and load dynamics during yaw manoeuvres

Experimental investigation of wind turbine wake and load dynamics during yaw maneuvers

Experimental investigation of wind turbine wake dynamics during yaw variation

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