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PIBE project organisation

A project structured in 3 work packages

Caractériser les phénomènes de modulation d'amplitude - © LMFA

Work Package 1 : Characterizing the amplitude modulation phenomena

Amplitude modulation phenomena, particularly those associated with dynamic stall on wind turbine blades, are a source of intermittent noise that can cause noise annoyance. WP 1 aims to characterize and understand the relationship between the occurrence of dynamic stalls and the meteorological and operational conditions of the wind turbine on a given site.

3 approaches  are explored: characterization of dynamic stall noise in a controlled environment (anechoic wind tunnel measurements), measurement of stall noise in situ and correlation with atmospheric conditions, modelling of wind turbine noise amplitude modulations

Estimer la variabilité des niveaux sonores et les incertitudes associées

Work package 2 : Estimating the variability of sound levels and the associated uncertainties

The noise perceived at dwellings located in the vicinity of wind farms can exhibit some variability over time, even at stationary wind speed. The cause of this variability is very often related to the influence of local micrometeorology, which can affect both sound emission at the blade and sound propagation between the source and local residents, as well as spatial and temporal variations in ground properties.

WP 2 aims to estimate these variabilities and the uncertainties associated with them. Solving this problem would enable wind farm developers to estimate more precisely the risk of noise annoyance and to design optimally their wind farms. In order to tackle this issue, the WP2 is structured in 4 tasks: estimation of uncertainties related to sound emission, estimation of uncertainties related to sound propagation, estimation of global/coupled uncertainties on noise predictions, experimental validation of the uncertainty model.

Réduire le bruit à la source - © LMFA

Work package 3 : Reducing noise at source

WP 3 focuses on research and design of systems that minimize the generation of aerodynamic noise at the blade level. These systems are retrofit systems and are therefore independent of wind turbine manufacturers. Some manufacturers may occasionally provide noise reduction solutions, such as serrations, which focus mainly on the noise generated at the trailing edge. New solutions, not available from manufacturers, and placed on the leading edge of the blade are also explored.

WP 3 deals with the wind tunnel evaluation of these different types of devices in order to decide on the noise reduction potential of these techniques.

Project organisation

Technical organization

structure projet eng

Project Management

Management and coordination

  • David Ecotière (Cerema/UMRAE)

Steering Comitee

  • David Ecotière (Cerema/UMRAE)
  • Benoit Gauvreau (Ifsttar/UMRAE)
  • Benjamin Cotté (ENSTA ParisTech/IMSIA)
  • Michel Roger (Ecole Centrale de Lyon/LMFA)
  • Marie-Cécile Nessi (EDF Renouvelables)
  • Isabelle Schmich-Yamane (EDF DTG)

Scientific coordination

  • WP 1 : Michel Roger (Ecole Centrale de Lyon/LMFA)
  • WP 2 : Benoit Gauvreau (Ifsttar/UMRAE)
  • WP 3 : Marie-Cécile Nessi (EDF Renouvelables)

Agenda and funding

Agenda: the PIBE project covers a 4-year period from 01/01/2019 to 01/01/2023
Funding: the total cost of the project is €1,360,000. The project is half funded by the ANR and half self-financed by each of the partners.

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