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STRUCTURAL DESIGN AND EXPERIMENTAL INVESTIGATIONS OF A SHAPE-ADAPTIVE SLAT FOR WIND ENERGY ROTOR BLADES

Huxdorf, Oliver and Riemenschneider, Johannes and Lorsch, Paul and Radestock, Martin (2017) STRUCTURAL DESIGN AND EXPERIMENTAL INVESTIGATIONS OF A SHAPE-ADAPTIVE SLAT FOR WIND ENERGY ROTOR BLADES. In: SMART2017 - 8th ECCOMAS Thematic Conference on Smart Structures and Materials. SMART 2017, 05.-08. Jun. 2017, Madrid, Spanien.

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Abstract

The trend towards larger rotor blades is still continuing, since the generated electrical power is proportional to the square of the blade length. However increasing rotor blade length will also increase the blades weight by the radius cube. Consequently mass induced loads such as centrifugal loads also increase. In addition larger blades lead to increased dynamic blade loads induced by vertical wind gradients and turbulent inflow conditions. A morphing slat that allows a dynamic gap variation between the slat’s railing edge and the main profile offers a great opportunity to reduce such fatigue loads. In order to show the proof of concept of such a shape-adaptive slat, a wind tunnel experiment was designed and executed. This paper presents the development of the shape-adaptive slat in wind tunnel scale. In order to ensure the fatigue behaviour a parameter study for the slat’s design is done. The bjective is to avoid a concentrated local strain maximum in the case of the deformed slat. As a next step, six slat segments are manufactured to investigate the deformation behaviour and to validate the simulations in a static experiment. The same segments are used to perform long-term fatigue investigations with dynamic slat deformations. Based on the experimental results a heat treated steel is selected to manufacture the final wind tunnel slat.

Item URL in elib:https://elib.dlr.de/118925/
Document Type:Conference or Workshop Item (Speech)
Title:STRUCTURAL DESIGN AND EXPERIMENTAL INVESTIGATIONS OF A SHAPE-ADAPTIVE SLAT FOR WIND ENERGY ROTOR BLADES
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Huxdorf, OliverInstitut für Faserverbundleichtbau und Adaptronik - Adaptronikhttps://orcid.org/0000-0002-4247-8278
Riemenschneider, JohannesInstitut für Faserverbundleichtbau und Adaptronik - Adaptronikhttps://orcid.org/0000-0001-5485-8326
Lorsch, Paulpaul.lorsch (at) dlr.dehttps://orcid.org/0000-0001-8539-3816
Radestock, MartinInstitut für Faserverbundleichtbau und Adaptronik - Adaptronikhttps://orcid.org/0000-0002-9918-3315
Date:June 2017
Journal or Publication Title:SMART2017 - 8th ECCOMAS Thematic Conference on Smart Structures and Materials
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Adaptronik, Morphing, Wind Energy, Rotor Blades
Event Title:SMART 2017
Event Location:Madrid, Spanien
Event Type:international Conference
Event Dates:05.-08. Jun. 2017
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:other
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Wind Energy (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Huxdorf, Oliver
Deposited On:26 Feb 2018 07:40
Last Modified:31 Jul 2019 20:16

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