A CFD code comparison of wind turbine wakes

Paul Maarten Laan, van der; R. C. Storey; Niels N. Sørensen; S.E. Norris; J. E. Cater

doi:10.1088/1742-6596/524/1/012140

A CFD code comparison of wind turbine wakes

Paul Maarten Laan, van der, R. C. Storey, Niels N. Sørensen, S.E. Norris, J. E. Cater

The University of Auckland

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Abstract

A comparison is made between the EllipSys3D and SnS CFD codes. Both codes are used to perform Large-Eddy Simulations (LES) of single wind turbine wakes, using the actuator disk method. The comparison shows that both LES models predict similar velocity deficits and stream-wise Reynolds-stresses for four test cases. A grid resolution study, performed in EllipSys3D and SnS, shows that a minimal uniform cell spacing of 1/30 of the rotor diameter is necessary to resolve the wind turbine wake. In addition, the LES-predicted velocity deficits are also compared with Reynolds-Averaged Navier Stokes simulations using EllipSys3D for a test case that is based on field measurements. In these simulations, two eddy viscosity turbulence models are employed: the k- (ε) model and the k- (ε)-fp model. Where the k- (ε) model fails to predict the velocity deficit, the results of the k- (ε)-fP model show good agreement with both LES models and measurements.

Original language	English
Article number	012140
Book series	Journal of Physics: Conference Series (Online)
Volume	524
Issue number	1
Number of pages	10
ISSN	1742-6596
DOIs	https://doi.org/10.1088/1742-6596/524/1/012140
Publication status	Published - 2014
Event	5th International Conference on The Science of Making Torque from Wind 2014 - Technical University of Denmark, Copenhagen, Denmark Duration: 10 Jun 2014 → 20 Jun 2014 Conference number: 5 http://indico.conferences.dtu.dk/conferenceDisplay.py?confId=138

Conference

Conference	5th International Conference on The Science of Making Torque from Wind 2014
Number	5
Location	Technical University of Denmark
Country/Territory	Denmark
City	Copenhagen
Period	10/06/2014 → 20/06/2014
Internet address	http://indico.conferences.dtu.dk/conferenceDisplay.py?confId=138

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Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of 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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title = "A CFD code comparison of wind turbine wakes",

abstract = "A comparison is made between the EllipSys3D and SnS CFD codes. Both codes are used to perform Large-Eddy Simulations (LES) of single wind turbine wakes, using the actuator disk method. The comparison shows that both LES models predict similar velocity deficits and stream-wise Reynolds-stresses for four test cases. A grid resolution study, performed in EllipSys3D and SnS, shows that a minimal uniform cell spacing of 1/30 of the rotor diameter is necessary to resolve the wind turbine wake. In addition, the LES-predicted velocity deficits are also compared with Reynolds-Averaged Navier Stokes simulations using EllipSys3D for a test case that is based on field measurements. In these simulations, two eddy viscosity turbulence models are employed: the k- (ε) model and the k- (ε)-fp model. Where the k- (ε) model fails to predict the velocity deficit, the results of the k- (ε)-fP model show good agreement with both LES models and measurements.",

author = "{Laan, van der}, {Paul Maarten} and Storey, {R. C.} and S{\o}rensen, {Niels N.} and S.E. Norris and Cater, {J. E.}",

note = "Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of 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; 5th International Conference on The Science of Making Torque from Wind 2014, TORQUE 2014 ; Conference date: 10-06-2014 Through 20-06-2014",

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AU - Laan, van der, Paul Maarten

AU - Storey, R. C.

AU - Sørensen, Niels N.

AU - Norris, S.E.

AU - Cater, J. E.

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N2 - A comparison is made between the EllipSys3D and SnS CFD codes. Both codes are used to perform Large-Eddy Simulations (LES) of single wind turbine wakes, using the actuator disk method. The comparison shows that both LES models predict similar velocity deficits and stream-wise Reynolds-stresses for four test cases. A grid resolution study, performed in EllipSys3D and SnS, shows that a minimal uniform cell spacing of 1/30 of the rotor diameter is necessary to resolve the wind turbine wake. In addition, the LES-predicted velocity deficits are also compared with Reynolds-Averaged Navier Stokes simulations using EllipSys3D for a test case that is based on field measurements. In these simulations, two eddy viscosity turbulence models are employed: the k- (ε) model and the k- (ε)-fp model. Where the k- (ε) model fails to predict the velocity deficit, the results of the k- (ε)-fP model show good agreement with both LES models and measurements.

AB - A comparison is made between the EllipSys3D and SnS CFD codes. Both codes are used to perform Large-Eddy Simulations (LES) of single wind turbine wakes, using the actuator disk method. The comparison shows that both LES models predict similar velocity deficits and stream-wise Reynolds-stresses for four test cases. A grid resolution study, performed in EllipSys3D and SnS, shows that a minimal uniform cell spacing of 1/30 of the rotor diameter is necessary to resolve the wind turbine wake. In addition, the LES-predicted velocity deficits are also compared with Reynolds-Averaged Navier Stokes simulations using EllipSys3D for a test case that is based on field measurements. In these simulations, two eddy viscosity turbulence models are employed: the k- (ε) model and the k- (ε)-fp model. Where the k- (ε) model fails to predict the velocity deficit, the results of the k- (ε)-fP model show good agreement with both LES models and measurements.

U2 - 10.1088/1742-6596/524/1/012140

DO - 10.1088/1742-6596/524/1/012140

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JO - Journal of Physics: Conference Series (Online)

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T2 - 5th International Conference on The Science of Making Torque from Wind 2014

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ER -

A CFD code comparison of wind turbine wakes

Abstract

Conference

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