Aeroelastic design and LPV modelling of an experimental wind turbine blade equipped with free-floating flaps

Conference paper (2016)

Authors

S.T. Navalkar Team Raf Van de Plas - Mechanical, Maritime and Materials Engineering
L.O. Bernhammer Wind Energy - Aerospace Engineering
J. Sodja Aerospace Structures & Computational Mechanics - Aerospace Engineering
C.J. Slinkman Support Delft Center for Systems and Control - Mechanical, Maritime and Materials Engineering
J.W. van Wingerden Team Raf Van de Plas - Mechanical, Maritime and Materials Engineering
G.A.M. van Kuik Wind Energy - Aerospace Engineering
Research Group
Team Raf Van de Plas (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2016 S.T. Navalkar, L.O. Bernhammer, J. Sodja, C.J. Slinkman, J.W. van Wingerden, G.A.M. van Kuik
DOI: https://doi.org/10.1088/1742-6596/753/4/042010
More Info
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Published Date

2016

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Delft Center for Systems and Control

Research Group

Team Raf Van de Plas

Abstract

Trailing edge aps located outboard on wind turbine blades have recently shown considerable potential in the alleviation of turbine lifetime dynamic loads. The concept of the free-oating ap is speci_cally interesting for wind turbines, on account of its modularity and enhanced control authority. Such a ap is free to rotate about its axis; camberline control of the free-oating ap allows for aeroelastic control of blade loads. This paper describes the design of a scaled wind turbine blade instrumented with free-oating aps, intended for use in wind tunnel experiments. The nature of the ap introduces a coupled form of utter due to the aeroelastic coupling of ap rigid-body and blade out-of-plane modes; for maximal control authority it is desired to operate close to the utter limit. Analytical and numerical methods are used to perform a utter analysis of the turbine blade. It is shown that the potential ow aeroelastic model can be recast as a continuous-time Linear-Parameter-Varying (LPV) state space model of a low order, for which formal controller design methodologies are readily available.