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Experimental Analysis of a Wind-Turbine Rotor Blade Airfoil by means of Temperature-Sensitive Paint

Costantini, Marco and Fuchs, Carsten and Henne, Ulrich and Klein, Christian and Ondrus, Vladimir and Bruse, Martin and Löhr, Markus and Jacobs, Markus (2019) Experimental Analysis of a Wind-Turbine Rotor Blade Airfoil by means of Temperature-Sensitive Paint. In: AIAA Scitech Forum, 2019 (0800), pp. 1-33. AIAA. AIAA Science and Technology Forum and Exposition 2019, 07.-11. Jan. 2019, San Diego, USA. DOI: 10.2514/6.2019-0800 ISBN 978-162410578-4

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Official URL: https://arc.aiaa.org/doi/abs/10.2514/6.2019-0800

Abstract

Knowledge on the boundary-layer transition location at large chord Reynolds numbers (Re ≥ 3 million) is essential to evaluate the performance of airfoils designed for modern wind-turbine rotor blades, which rotor diameters can be of the order of hundred meters. In the present work, a temperature-sensitive paint (TSP) was used to systematically study boundary-layer transition on the suction side of a DU 91-W2-250 airfoil. The experiments were performed in the High-Pressure Wind Tunnel Göttingen at chord Reynolds numbers up to Re = 12 million and angles-of-attack from -14° to 20°. The coefficients of airfoil lift, drag, and pitching moment were also obtained after integration of the pressure distributions measured on the wind-tunnel model surface and in the model wake. The surface data obtained by means of TSP enabled not only to analyze the evolution of the transition location with varying angle-of-attack and chord Reynolds number, but also to provide an explanation for the evolution of the aerodynamic coefficients measured at stall and post-stall conditions. The stability of the laminar boundary layers investigated in the experiments was analyzed according to linear stability theory. The results of the stability computations supported the experimentally observed variations in the transition location. The amplification factors of boundary-layer disturbances at transition were also determined by correlating the experimental and numerical results.

Item URL in elib:https://elib.dlr.de/126685/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper No.: AIAA-2019-0800
Title:Experimental Analysis of a Wind-Turbine Rotor Blade Airfoil by means of Temperature-Sensitive Paint
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Costantini, Marcomarco.costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Fuchs, Carstencarsten.fuchs (at) dlr.deUNSPECIFIED
Henne, Ulrichulrich.henne (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.dehttps://orcid.org/0000-0001-7592-6922
Ondrus, Vladimirvondrus (at) yahoo.comUNSPECIFIED
Bruse, MartinMartin.Bruse (at) dnw.aeroUNSPECIFIED
Löhr, MarkusMarkus.Loehr (at) dnw.aeroUNSPECIFIED
Jacobs, Markusmarkus.jacobs (at) dnw.aeroUNSPECIFIED
Date:January 2019
Journal or Publication Title:AIAA Scitech Forum, 2019
Refereed publication:Yes
Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.2514/6.2019-0800
Page Range:pp. 1-33
Publisher:AIAA
Series Name:Conference Proceedings (Online)
ISBN:978-162410578-4
Status:Published
Keywords:Temperature-sensitive paint, Wind Turbine, Transition, Rotor Blade, TSP, separation
Event Title:AIAA Science and Technology Forum and Exposition 2019
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:07.-11. Jan. 2019
Organizer:AIAA
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:AS-EXV
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
German-Dutch Windtunnels > Business Unit Göttingen und Köln (GUK)
Deposited By: Micknaus, Ilka
Deposited On:03 Mar 2019 13:37
Last Modified:02 Aug 2019 13:21

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