A morphing trailing edge flap system for wind turbine blades

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The development of a morphing trailing edge system for wind turbines, also called a flap system, is presented. The functionality is simple as the flap deflection is controlled by pressurized air or a fluid in a number of voids in the flap made of an elastic material. It is thus a robust system as no mechanical or metal parts are used. The prototypes tested in the laboratory and on a blade section in a wind tunnel in the period from 2007-2010 demonstrated the functionality and the aerodynamic performance of the flap concept. In a recent research and development project INDUFLAP from 2011-2014 the flap system has been further developed in corporation with the industrial partners Hydratech Industries (DK) and Rehau (DE). A new trailing edge flap design with spanwise voids (channels) and with a chord of 15cm suitable for a 1m chord blade section was developed. It was then manufactured by extrusion and glued together with a load carrying part with a connector part that allows an easy attachment on the blade section. After tests in the laboratory the flap was mounted on a 2m long blade section mounted on a newly developed test rig. A 10m long boom with the blade section was installed on a 100kW turbine hub where the original blades were taken down. It means that the flap system was tested under realistic rotating conditions with real atmospheric turbulent inflow and with a g loading up to 10g which represents the conditions on the outer part of a MW turbine blade. The measured performance of the flap system shows that 3 deg. flap deflection gives the same lift change as 1 deg. pitch of the whole blade section.
Original languageEnglish
Title of host publicationProceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015)
EditorsA.L. Araújo, C.A. Mota Soares
Number of pages10
PublisherIDMEC
Publication date2015
Publication statusPublished - 2015
Event7th ECCOMAS Thematic Conference on Smart Structures and Materials - Ponta Delgada, Portugal
Duration: 3 Jun 20156 Jun 2015
Conference number: 7
http://www.dem.ist.utl.pt/smart2015/

Conference

Conference7th ECCOMAS Thematic Conference on Smart Structures and Materials
Number7
CountryPortugal
CityPonta Delgada
Period03/06/201506/06/2015
Internet address

Keywords

  • Morphing trailing edge
  • Smart structure
  • Wind turbine blade
  • Load alleviation
  • Experimental validation

Cite this

Aagaard Madsen , H., Barlas, A., & Løgstrup Andersen, T. (2015). A morphing trailing edge flap system for wind turbine blades. In A. L. Araújo, & C. A. Mota Soares (Eds.), Proceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015) IDMEC.
Aagaard Madsen , Helge ; Barlas, Athanasios ; Løgstrup Andersen, Tom. / A morphing trailing edge flap system for wind turbine blades. Proceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015). editor / A.L. Araújo ; C.A. Mota Soares. IDMEC, 2015.
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abstract = "The development of a morphing trailing edge system for wind turbines, also called a flap system, is presented. The functionality is simple as the flap deflection is controlled by pressurized air or a fluid in a number of voids in the flap made of an elastic material. It is thus a robust system as no mechanical or metal parts are used. The prototypes tested in the laboratory and on a blade section in a wind tunnel in the period from 2007-2010 demonstrated the functionality and the aerodynamic performance of the flap concept. In a recent research and development project INDUFLAP from 2011-2014 the flap system has been further developed in corporation with the industrial partners Hydratech Industries (DK) and Rehau (DE). A new trailing edge flap design with spanwise voids (channels) and with a chord of 15cm suitable for a 1m chord blade section was developed. It was then manufactured by extrusion and glued together with a load carrying part with a connector part that allows an easy attachment on the blade section. After tests in the laboratory the flap was mounted on a 2m long blade section mounted on a newly developed test rig. A 10m long boom with the blade section was installed on a 100kW turbine hub where the original blades were taken down. It means that the flap system was tested under realistic rotating conditions with real atmospheric turbulent inflow and with a g loading up to 10g which represents the conditions on the outer part of a MW turbine blade. The measured performance of the flap system shows that 3 deg. flap deflection gives the same lift change as 1 deg. pitch of the whole blade section.",
keywords = "Morphing trailing edge, Smart structure, Wind turbine blade, Load alleviation, Experimental validation",
author = "{Aagaard Madsen}, Helge and Athanasios Barlas and {L{\o}gstrup Andersen}, Tom",
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Aagaard Madsen , H, Barlas, A & Løgstrup Andersen, T 2015, A morphing trailing edge flap system for wind turbine blades. in AL Araújo & CA Mota Soares (eds), Proceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015). IDMEC, 7th ECCOMAS Thematic Conference on Smart Structures and Materials, Ponta Delgada, Portugal, 03/06/2015.

A morphing trailing edge flap system for wind turbine blades. / Aagaard Madsen , Helge; Barlas, Athanasios; Løgstrup Andersen, Tom.

Proceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015). ed. / A.L. Araújo; C.A. Mota Soares. IDMEC, 2015.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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T1 - A morphing trailing edge flap system for wind turbine blades

AU - Aagaard Madsen , Helge

AU - Barlas, Athanasios

AU - Løgstrup Andersen, Tom

PY - 2015

Y1 - 2015

N2 - The development of a morphing trailing edge system for wind turbines, also called a flap system, is presented. The functionality is simple as the flap deflection is controlled by pressurized air or a fluid in a number of voids in the flap made of an elastic material. It is thus a robust system as no mechanical or metal parts are used. The prototypes tested in the laboratory and on a blade section in a wind tunnel in the period from 2007-2010 demonstrated the functionality and the aerodynamic performance of the flap concept. In a recent research and development project INDUFLAP from 2011-2014 the flap system has been further developed in corporation with the industrial partners Hydratech Industries (DK) and Rehau (DE). A new trailing edge flap design with spanwise voids (channels) and with a chord of 15cm suitable for a 1m chord blade section was developed. It was then manufactured by extrusion and glued together with a load carrying part with a connector part that allows an easy attachment on the blade section. After tests in the laboratory the flap was mounted on a 2m long blade section mounted on a newly developed test rig. A 10m long boom with the blade section was installed on a 100kW turbine hub where the original blades were taken down. It means that the flap system was tested under realistic rotating conditions with real atmospheric turbulent inflow and with a g loading up to 10g which represents the conditions on the outer part of a MW turbine blade. The measured performance of the flap system shows that 3 deg. flap deflection gives the same lift change as 1 deg. pitch of the whole blade section.

AB - The development of a morphing trailing edge system for wind turbines, also called a flap system, is presented. The functionality is simple as the flap deflection is controlled by pressurized air or a fluid in a number of voids in the flap made of an elastic material. It is thus a robust system as no mechanical or metal parts are used. The prototypes tested in the laboratory and on a blade section in a wind tunnel in the period from 2007-2010 demonstrated the functionality and the aerodynamic performance of the flap concept. In a recent research and development project INDUFLAP from 2011-2014 the flap system has been further developed in corporation with the industrial partners Hydratech Industries (DK) and Rehau (DE). A new trailing edge flap design with spanwise voids (channels) and with a chord of 15cm suitable for a 1m chord blade section was developed. It was then manufactured by extrusion and glued together with a load carrying part with a connector part that allows an easy attachment on the blade section. After tests in the laboratory the flap was mounted on a 2m long blade section mounted on a newly developed test rig. A 10m long boom with the blade section was installed on a 100kW turbine hub where the original blades were taken down. It means that the flap system was tested under realistic rotating conditions with real atmospheric turbulent inflow and with a g loading up to 10g which represents the conditions on the outer part of a MW turbine blade. The measured performance of the flap system shows that 3 deg. flap deflection gives the same lift change as 1 deg. pitch of the whole blade section.

KW - Morphing trailing edge

KW - Smart structure

KW - Wind turbine blade

KW - Load alleviation

KW - Experimental validation

M3 - Article in proceedings

BT - Proceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015)

A2 - Araújo, A.L.

A2 - Mota Soares, C.A.

PB - IDMEC

ER -

Aagaard Madsen H, Barlas A, Løgstrup Andersen T. A morphing trailing edge flap system for wind turbine blades. In Araújo AL, Mota Soares CA, editors, Proceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015). IDMEC. 2015