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Simulation of transient gusts on the NREL 5 MW wind turbine using the URANS solver THETA

Länger-Möller, Annika (2018) Simulation of transient gusts on the NREL 5 MW wind turbine using the URANS solver THETA. Wind Energy Science, 2018 (3), pp. 461-474. Copernicus Publications. doi: 10.5194/wes-3-461-2018. ISSN 2366-7443.

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A procedure to propagate longitudinal transient gusts through a flow field by using the resolved-gust approach is implemented in the URANS solver THETA. Both the gust strike of a 1 − <i>cos</i>() gust and an extreme operating gust following the IEC 61400-1 standard are investigated on the generic NREL 5 MW wind turbine at rated operating conditions. The impact of both gusts on pressure distributions, rotor thrust, rotor torque, and flow states on the blade are examined and quantified. The flow states on the rotor blade before the gust strike at maximum and minimum gust velocity are compared. An increased blade loading is detectable in the pressure coefficients and integrated blade loads. The friction force coefficients indicate the dynamic separation and re-attachment of the flow during the gust. Moreover, a verification of the method is performed by comparing the rotor torque during the extreme operating gust to results of FAST rotor code.

Item URL in elib:https://elib.dlr.de/120908/
Document Type:Article
Title:Simulation of transient gusts on the NREL 5 MW wind turbine using the URANS solver THETA
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Länger-Möller, Annikaannika.laenger (at) dlr.dehttps://orcid.org/0000-0003-1599-3239
Journal or Publication Title:Wind Energy Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.5194/wes-3-461-2018
Page Range:pp. 461-474
EditorsEmailEditor's ORCID iD
UNSPECIFIEDEuropean Academy of Wind Energy e.V.UNSPECIFIED
Publisher:Copernicus Publications
Keywords:Wind energy, CFD, Gusts, loads, wind turbine
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Deposited By: Seyfried, Beate
Deposited On:11 Jul 2018 13:01
Last Modified:19 Nov 2021 20:37

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