A numerical study on the flow upstream of a wind turbine on complex terrain

Alexander Raul Meyer Forsting; Andreas Bechmann; Niels Troldborg

doi:10.1088/1742-6596/753/3/032041

A numerical study on the flow upstream of a wind turbine on complex terrain

Alexander Raul Meyer Forsting, Andreas Bechmann, Niels Troldborg

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Abstract

The interaction of a wind turbine with the upstream flow-field in complex and flat terrain is studied using Reynolds-averaged Navier-Stokes (RANS) simulations with a two equation turbulence closure. The complex site modelled is Perdigao (Portugal), where a turbine is located on one of two parallel running ridges. Simulating various wind directions with and without rotor, the impact of the rotor on the flow-field upstream is determined. This is compared and related to simulations with sheared and uniform inflow. The induction zones forming for these two inflows agree to such an extent, that shear could be interpreted as linear perturbation to the uniform inflow solution. However, for complex terrain this is not the case, as it is highly dependant on flow features caused by the topography and their interaction with the rotor. Separation in the lee of the ridge plays a crucial role, as it dictates the wind turbine wake trajectory which in turn governs the orientation of the induction zone

Original language	English
Article number	032041
Book series	Journal of Physics: Conference Series (Online)
Volume	753
Number of pages	10
ISSN	1742-6596
DOIs	https://doi.org/10.1088/1742-6596/753/3/032041
Publication status	Published - 2016
Event	The Science of Making Torque from Wind 2016 - Technische Universität München (TUM), Munich, Germany Duration: 5 Oct 2016 → 7 Oct 2016 Conference number: 6 https://www.events.tum.de/?sub=29

Conference

Conference	The Science of Making Torque from Wind 2016
Number	6
Location	Technische Universität München (TUM)
Country/Territory	Germany
City	Munich
Period	05/10/2016 → 07/10/2016
Internet address	https://www.events.tum.de/?sub=29

Bibliographical note

Content from this work may be used under the terms of theCreative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

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JPCS 753 3 032041Final published version, 6.73 MB

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UniTTe: Unified testing procedures for wind turbines through inflow characterisation using nacelle lidars
Wagner, R. (Project Manager), Pedersen, T. F. (Project Participant), Troldborg, N. L. (Project Participant), Meyer Forsting, A. R. (Project Participant), Bechmann, A. (Project Participant), Courtney, M. S. (Project Participant), Borraccino, A. (Project Participant), Vignaroli, A. (Project Participant), Natarajan, A. (Project Participant), Sathe, A. (Project Participant) & Dimitrov, N. K. (Project Participant)
01/01/2014 → 31/12/2017
Project: Research

Cite this

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title = "A numerical study on the flow upstream of a wind turbine on complex terrain",

abstract = "The interaction of a wind turbine with the upstream flow-field in complex and flat terrain is studied using Reynolds-averaged Navier-Stokes (RANS) simulations with a two equation turbulence closure. The complex site modelled is Perdigao (Portugal), where a turbine is located on one of two parallel running ridges. Simulating various wind directions with and without rotor, the impact of the rotor on the flow-field upstream is determined. This is compared and related to simulations with sheared and uniform inflow. The induction zones forming for these two inflows agree to such an extent, that shear could be interpreted as linear perturbation to the uniform inflow solution. However, for complex terrain this is not the case, as it is highly dependant on flow features caused by the topography and their interaction with the rotor. Separation in the lee of the ridge plays a crucial role, as it dictates the wind turbine wake trajectory which in turn governs the orientation of the induction zone",

author = "{Meyer Forsting}, {Alexander Raul} and Andreas Bechmann and Niels Troldborg",

note = "Content from this work may be used under the terms of theCreative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd; The Science of Making Torque from Wind 2016, TORQUE 2016 ; Conference date: 05-10-2016 Through 07-10-2016",

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AB - The interaction of a wind turbine with the upstream flow-field in complex and flat terrain is studied using Reynolds-averaged Navier-Stokes (RANS) simulations with a two equation turbulence closure. The complex site modelled is Perdigao (Portugal), where a turbine is located on one of two parallel running ridges. Simulating various wind directions with and without rotor, the impact of the rotor on the flow-field upstream is determined. This is compared and related to simulations with sheared and uniform inflow. The induction zones forming for these two inflows agree to such an extent, that shear could be interpreted as linear perturbation to the uniform inflow solution. However, for complex terrain this is not the case, as it is highly dependant on flow features caused by the topography and their interaction with the rotor. Separation in the lee of the ridge plays a crucial role, as it dictates the wind turbine wake trajectory which in turn governs the orientation of the induction zone

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T2 - The Science of Making Torque from Wind 2016

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A numerical study on the flow upstream of a wind turbine on complex terrain

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UniTTe: Unified testing procedures for wind turbines through inflow characterisation using nacelle lidars

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