Conference programme

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Tuesday, 17 November 2015
17:00 - 18:30 Rotors & blades
Turbine technology  
Onshore      Offshore    

Room: Montmartre

State of art regarding new control devices and materials to reduce loads and extend life of blades with a direct impact on risks and costs for the application on new technology.

Learning objectives

  • Flow control devices to reduce load on turbine blades
  • Impact on risks and cost for the application on flap technology
  • Flap technology performance in real turbulence flow
  • Loads on blade root connections and pitch bearing
  • To know the application of different modeling alternatives
Lead Session Chair:
Gerard J.W. Van Bussel, TU Delft, The Netherlands
Ferran Roura GE Renewable Energy, Spain
Maria Francesca Lecca (1) F Ferran Roura Port (1) Marcos José Freitas Rodrigues (2)
(1) Alstom Renovables España, Barcelona, Spain (2) TECSIS, Sorocaba, São Paulo, Brazil

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Presenter's biography

Biographies are supplied directly by presenters at EWEA 2015 and are published here unedited

Mr. Ferran Roura is currently Design Engineer in the Structural Nacelle department at GE Renewable Energy in Barcelona. He studied Mechanical Engineering at the Polytechnic University of Catalonia, Spain. He focused his career on the FEM since his Thesis (Friction Stir Welding Process simulation). In 2011 he began his collaboration with Alstom’s Structural department (GE from 02/11/2015), joining the company in 2012. He has been working in structural components design and calculation, specially casting components and bolted connections. He has also collaborated in the development of new calculation methodologies for structural bolted connections and its experimental validation.


Validation and Correlation of Numerical models of blade root-pitch connection based on experimental databases


This work is of interest for engineers involved in structural design and validation of wind turbines. Reliable design of the bolted joints of wind turbines is essential for the overall structural integrity. Validation is therefore significant, especially for new designs. On the other side, design optimization can bring important cost and material savings. The availability of experimental databases is beneficial for both validation and optimization.


In the work presented, an experimental database for the bolted joints of the blade root-pitch connection of a wind turbine has been generated for design validation.

Main body of abstract

The bolted joints of the blade root-pitch connection of a wind turbine have been instrumented in a full scale test bench where blade, bearing and test plate representing the hub were present. Measurements have been recorded during static tests with different pitch angles. Experimental data have been compared with expected values from design calculations, based on advanced numerical models. The comparison between design values and experimental data validates the models used for design.


Experimental validation, which is the main result of the work, is important for reliable design. The experimental database generated also represents the reference for a next step not presented here, the optimization, where different modeling alternatives can be investigated.

Learning objectives
Generation of experimental databases can be useful for validation and correlation. Experiments should be done on test benches as much as possible representative of reality and measurements should be oriented to obtain results directly comparable to design data.