On the Inuence of Far-Wake Resolution on Wind Turbine Flow Simulations

Frederik Zahle, Niels Sørensen

Research output: Contribution to journalJournal articleResearchpeer-review

25 Citations (Scopus)

Abstract

 

A study was made on the influence of the wake mesh resolution on the integrated forces acting on a wind turbine rotor using an unsteady incompressible Navier-Stokes flow solver. Solutions were obtained for five wake resolutions ranging from 0.5 rotor diameters to 7.5 diameters downstream resolving up to 13 tip vortex revolutions. It was found that the resolution of the tip vortices in the far-wake beyond half a diameter downstream did not influence the induced velocities in the rotor plane significantly, with the low speed shaft torque differing less than approximately 1% for the rotor in question.

 
Original languageEnglish
Book seriesJournal of Physics - Conference Series
Volume75
Number of pages9
ISSN1742-6588
DOIs
Publication statusPublished - 2007

Fingerprint

wind turbines
wakes
rotors
simulation
vortices
Stokes flow
low speed
torque
mesh

Bibliographical note

Presented at the conference "The Science of Making Torque from Wind" 28-31 August 2007, Technical University of Denmark

Cite this

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abstract = "  A study was made on the influence of the wake mesh resolution on the integrated forces acting on a wind turbine rotor using an unsteady incompressible Navier-Stokes flow solver. Solutions were obtained for five wake resolutions ranging from 0.5 rotor diameters to 7.5 diameters downstream resolving up to 13 tip vortex revolutions. It was found that the resolution of the tip vortices in the far-wake beyond half a diameter downstream did not influence the induced velocities in the rotor plane significantly, with the low speed shaft torque differing less than approximately 1{\%} for the rotor in question. ",
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On the Inuence of Far-Wake Resolution on Wind Turbine Flow Simulations. / Zahle, Frederik; Sørensen, Niels.

In: Journal of Physics - Conference Series, Vol. 75, 2007.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - On the Inuence of Far-Wake Resolution on Wind Turbine Flow Simulations

AU - Zahle, Frederik

AU - Sørensen, Niels

N1 - Presented at the conference "The Science of Making Torque from Wind" 28-31 August 2007, Technical University of Denmark

PY - 2007

Y1 - 2007

N2 -   A study was made on the influence of the wake mesh resolution on the integrated forces acting on a wind turbine rotor using an unsteady incompressible Navier-Stokes flow solver. Solutions were obtained for five wake resolutions ranging from 0.5 rotor diameters to 7.5 diameters downstream resolving up to 13 tip vortex revolutions. It was found that the resolution of the tip vortices in the far-wake beyond half a diameter downstream did not influence the induced velocities in the rotor plane significantly, with the low speed shaft torque differing less than approximately 1% for the rotor in question. 

AB -   A study was made on the influence of the wake mesh resolution on the integrated forces acting on a wind turbine rotor using an unsteady incompressible Navier-Stokes flow solver. Solutions were obtained for five wake resolutions ranging from 0.5 rotor diameters to 7.5 diameters downstream resolving up to 13 tip vortex revolutions. It was found that the resolution of the tip vortices in the far-wake beyond half a diameter downstream did not influence the induced velocities in the rotor plane significantly, with the low speed shaft torque differing less than approximately 1% for the rotor in question. 

U2 - doi:10.1088/1742-6596/75/1/012042

DO - doi:10.1088/1742-6596/75/1/012042

M3 - Journal article

VL - 75

JO - Journal of Physics: Conference Series (Online)

JF - Journal of Physics: Conference Series (Online)

SN - 1742-6596

ER -