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Main Title: Pressure-based lift estimation and its application to feedforward load control employing trailing-edge flaps
Author(s): Bartholomay, Sirko
Wester, Tom T. B.
Perez-Becker, Sebastian
Konze, Simon
Menzel, Christian
Hölling, Michael
Spickenheuer, Axel
Peinke, Joachim
Nayeri, Christian N.
Paschereit, Christian Oliver
Oberleithner, Kilian
Type: Article
Abstract: This experimental load control study presents results of an active trailing-edge flap feedforward controller for wind turbine applications. The controller input is derived from pressure-based lift estimation methods that rely either on a quasi-steady method, based on a three-hole probe, or on an unsteady method that is based on three selected surface pressure ports. Furthermore, a standard feedback controller, based on force balance measurements, is compared to the feedforward control. A Clark-Y airfoil is employed for the wing that is equipped with a trailing-edge flap of x/c=30% chordwise extension. Inflow disturbances are created by a two-dimensional active grid. The Reynolds number is Re=290 000, and reduced frequencies of k=0.07 up to k=0.32 are analyzed. Within the first part of the paper, the lift estimation methods are compared. The surface-pressure-based method shows generally more accurate results, whereas the three-hole probe estimate overpredicts the lift amplitudes with increasing frequencies. Nonetheless, employing the latter as input to the feedforward controller is more promising as a beneficial phase lead is introduced by this method. A successful load alleviation was achieved up to reduced frequencies of k=0.192.
Subject(s): wind energy
aeroelastic simulation
wind turbine control
load reduction control
active trailing edge flap
aeroelastische Simulation
aktive Hinterkantenklappe
Issue Date: 5-Feb-2021
Date Available: 17-Dec-2021
Language Code: en
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Sponsor/Funder: DFG, 218736457, Experimentelle Untersuchung von Strömungskontrollmethoden zur Lastkontrolle an Windkraftanlagen mittels einer Forschungswindkraftanlage im Windkanal
DFG, 414044773, Open Access Publizieren 2021 - 2022 / Technische Universität Berlin
Journal Title: Wind Energy Science Discussions
Publisher: Copernicus
Volume: 6
Issue: 1
Publisher DOI: 10.5194/wes-6-221-2021
Page Start: 221
Page End: 245
EISSN: 2366-7621
TU Affiliation(s): Fak. 5 Verkehrs- und Maschinensysteme » Inst. Strömungsmechanik und Technische Akustik (ISTA) » FG Experimentelle Strömungsmechanik
Appears in Collections:Technische Universität Berlin » Publications

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