elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Development of an interface to introduce stationary LES data to the URANS solver THETA for HAWT performance prediction

Länger-Möller, Annika (2020) Development of an interface to introduce stationary LES data to the URANS solver THETA for HAWT performance prediction. Wind Energy, 23 (2), pp. 161-176. Wiley. DOI: 10.1002/we.2421 ISSN 1095-4244

[img] PDF - Registered users only - Published version
17MB

Abstract

The impact of different sheared velocity profiles on the performance prediction of a horizontal axis wind turbine in the atmospheric boundary layer is investigated. Firstly, the wall roughness in the analytical logarithmic description of the atmospheric boundary layer is varied to obtain different velocity profiles. Subsequently, it is proposed to replace the analytical logarithmic description of the atmospheric boundary layer by the time‐averaged velocity data of a precursor large eddy simulation (LES) and to reconstruct the turbulence of the velocity fluctuations. The LES data are introduced as inflow condition through a LES‐RANS interface in a one‐way coupling approach. Three different methods to reconstruct URANS turbulence values out of the velocity fluctuations are investigated. It is shown that the reconstruction method has an impact on the development of the velocity profile, turbulent kinetic energy, and the turbulent dissipation during the transport through the URANS domain. The different inflow data, which the horizontal axis wind turbine experiences, are responsible for changes in the overall rotor thrust (up to 2.7%) and rotor torque (up to 2.4%). Conversely, the induction factors and effective angles of attack hardly change and can well be compared with a blade element momentum method. Finally, the results of both approaches to prescribe the atmospheric boundary layer are compared. The thrust and power coefficients, and wake recovery are close to each other. Simulations are carried out on an industrial 900 kW wind turbine with the incompressible URANS solver THETA.

Item URL in elib:https://elib.dlr.de/133722/
Document Type:Article
Title:Development of an interface to introduce stationary LES data to the URANS solver THETA for HAWT performance prediction
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Länger-Möller, AnnikaUNSPECIFIEDhttps://orcid.org/0000-0003-1599-3239
Date:February 2020
Journal or Publication Title:Wind Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:23
DOI :10.1002/we.2421
Page Range:pp. 161-176
Editors:
EditorsEmail
Wiley, JohnUNSPECIFIED
Publisher:Wiley
ISSN:1095-4244
Status:Published
Keywords:atmospheric boundary layer, wind turbine, CFD, LES-RANS-Interface, logarithmic velocity profile, turbulence model boundary condition, turbulence reconstruction
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
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Deposited By: Schwarz, Dr.-Ing. Thorsten
Deposited On:21 Jan 2020 11:32
Last Modified:21 Jan 2020 11:32

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.