Design and laboratory tests of flexible trailing edge demonstrators for wind turbine blades

Author:

Pohl Martin1ORCID,Riemenschneider Johannes1

Affiliation:

1. German Aerospace Center (DLR), Institute of Composite Structures and Adaptive Systems, Braunschweig, Germany

Abstract

To increase the power yield, wind turbines have significantly grown in the last decades. Today, this growth is more and more limited by the weight of the structures and fatigue loads. To compensate these loads, especially flapwise root bending moments, trailing edge flaps can be used. They can change the lift of the blade with little delay to equalize the aerodynamic lift and by this reduce the fatigue amplitude. Such a trailing edge flap has been designed, developed, built and experimentally tested. It uses a flexible, morphing design to seal the entire mechanics against environmental influences, such as rain, dust, or insects. Therefore a design made from glass fiber reinforced plastics in combination with elastomer materials is used. In this paper the design process from the concept to two consecutive demonstrators is presented. Both are tested in the laboratory for their morphing characteristics.

Funder

Bundesministerium für Wirtschaft und Energie

Publisher

SAGE Publications

Subject

Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment

Reference35 articles.

1. Wind Tunnel Test on Wind Turbine Airfoil with Adaptive Trailing Edge Geometry

2. Barlas A, Aagaard Madsen H, Enevoldsen K, et al. (2014) Flap testing on the rotating test rig in the induflap project. Technical report, DTU Wind Energy.

3. Barlas T, Hulskamp A, van Wingerden J, et al. (2006) Smart rotor blades and rotor control for wind turbines: state of the art. Knowledge base report for upwind WP 1B3, Delft University Wind Energy Research Institute (DUWIND), The Netherlands.

4. Barlas TK, Aagaard Madsen H (2014) Design and simulation of the rotating test rig in the induflap project. Technical report, DTU Wind Energy.

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