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

Sachin Navalkar; Lars Bernhammer; Jurij Sodja; Kees Slinkman; Jan-Willem van Wingerden; Gijs van Kuik

doi:10.1088/1742-6596/753/4/042010

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

Sachin Navalkar, Lars Bernhammer, Jurij Sodja, Kees Slinkman, Jan-Willem van Wingerden, Gijs van Kuik

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

3 Citations (Scopus)

66 Downloads (Pure)

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.

Original language	English
Title of host publication	Journal of Physics: Conference Series
Subtitle of host publication	TORQUE 2016: The Science of Making Torque from Wind
Editors	E. Bossanyi et al
Place of Publication	Bristol, UK
Publisher	IOP Publishing
Number of pages	11
Volume	753
Edition	C. Aeroservoelasticity, loads, structures and materials
DOIs	https://doi.org/10.1088/1742-6596/753/4/042010
Publication status	Published - 2016
Event	TORQUE 2016: 6th International Conference "The Science of Making Torque from Wind" - Technische Universität München (TUM), Campus Garching, Munich, Germany Duration: 5 Oct 2016 → 7 Oct 2016 https://www.events.tum.de/?sub=29

Publication series

Name	Journal of Physics: Conference Series
Publisher	IOP Publishing
Number	C. Aeroservoelasticity, loads, structures and materials
Volume	753
ISSN (Print)	1742-6588
ISSN (Electronic)	1742-6596

Conference

Conference	TORQUE 2016: 6th International Conference "The Science of Making Torque from Wind"
Country/Territory	Germany
City	Munich
Period	5/10/16 → 7/10/16
Internet address	https://www.events.tum.de/?sub=29

Access to Document

10.1088/1742-6596/753/4/042010

LPV Modelling of Experimental ind tunnel blade with free-floating flapFinal published version, 1.74 MBLicence: CC BY

Cite this

Navalkar, S., Bernhammer, L., Sodja, J., Slinkman, K., van Wingerden, J.-W., & van Kuik, G. (2016). Aeroelastic design and LPV modelling of an experimental wind turbine blade equipped with free-floating flaps. In E. Bossanyi et al (Ed.), Journal of Physics: Conference Series: TORQUE 2016: The Science of Making Torque from Wind ( C. Aeroservoelasticity, loads, structures and materials ed., Vol. 753). Article 042010 (Journal of Physics: Conference Series; Vol. 753, No. C. Aeroservoelasticity, loads, structures and materials). IOP Publishing. https://doi.org/10.1088/1742-6596/753/4/042010

Navalkar, Sachin ; Bernhammer, Lars ; Sodja, Jurij et al. / Aeroelastic design and LPV modelling of an experimental wind turbine blade equipped with free-floating flaps. Journal of Physics: Conference Series: TORQUE 2016: The Science of Making Torque from Wind . editor / E. Bossanyi et al. Vol. 753 C. Aeroservoelasticity, loads, structures and materials. ed. Bristol, UK : IOP Publishing, 2016. (Journal of Physics: Conference Series; C. Aeroservoelasticity, loads, structures and materials).

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

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. ",

author = "Sachin Navalkar and Lars Bernhammer and Jurij Sodja and Kees Slinkman and {van Wingerden}, Jan-Willem and {van Kuik}, Gijs",

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doi = "10.1088/1742-6596/753/4/042010",

language = "English",

volume = "753",

series = "Journal of Physics: Conference Series",

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booktitle = "Journal of Physics: Conference Series",

edition = " C. Aeroservoelasticity, loads, structures and materials",

note = "TORQUE 2016: 6th International Conference {"}The Science of Making Torque from Wind{"} ; Conference date: 05-10-2016 Through 07-10-2016",

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Navalkar, S, Bernhammer, L, Sodja, J, Slinkman, K, van Wingerden, J-W & van Kuik, G 2016, Aeroelastic design and LPV modelling of an experimental wind turbine blade equipped with free-floating flaps. in E Bossanyi et al (ed.), Journal of Physics: Conference Series: TORQUE 2016: The Science of Making Torque from Wind . C. Aeroservoelasticity, loads, structures and materials edn, vol. 753, 042010, Journal of Physics: Conference Series, no. C. Aeroservoelasticity, loads, structures and materials, vol. 753, IOP Publishing, Bristol, UK, TORQUE 2016: 6th International Conference "The Science of Making Torque from Wind", Munich, Germany, 5/10/16. https://doi.org/10.1088/1742-6596/753/4/042010

Aeroelastic design and LPV modelling of an experimental wind turbine blade equipped with free-floating flaps. / Navalkar, Sachin; Bernhammer, Lars; Sodja, Jurij et al.
Journal of Physics: Conference Series: TORQUE 2016: The Science of Making Torque from Wind . ed. / E. Bossanyi et al. Vol. 753 C. Aeroservoelasticity, loads, structures and materials. ed. Bristol, UK: IOP Publishing, 2016. 042010 (Journal of Physics: Conference Series; Vol. 753, No. C. Aeroservoelasticity, loads, structures and materials).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Aeroelastic design and LPV modelling of an experimental wind turbine blade equipped with free-floating flaps

AU - Navalkar, Sachin

AU - Bernhammer, Lars

AU - Sodja, Jurij

AU - Slinkman, Kees

AU - van Wingerden, Jan-Willem

AU - van Kuik, Gijs

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

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DO - 10.1088/1742-6596/753/4/042010

M3 - Conference contribution

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T3 - Journal of Physics: Conference Series

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PB - IOP Publishing

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ER -

Navalkar S, Bernhammer L, Sodja J, Slinkman K, van Wingerden JW , van Kuik G. Aeroelastic design and LPV modelling of an experimental wind turbine blade equipped with free-floating flaps. In Bossanyi et al E, editor, Journal of Physics: Conference Series: TORQUE 2016: The Science of Making Torque from Wind . C. Aeroservoelasticity, loads, structures and materials ed. Vol. 753. Bristol, UK: IOP Publishing. 2016. 042010. (Journal of Physics: Conference Series; C. Aeroservoelasticity, loads, structures and materials). doi: 10.1088/1742-6596/753/4/042010

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

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