Assessing and improving trailing-edge noise reduction technologies for industrial wind-turbine applications

Assessing and improving trailing-edge noise reduction technologies for industrial wind-turbine applications

Luesutthiviboon, S. (TU Delft Aircraft Noise and Climate Effects)

Snellen, M. (promotor)
Ragni, D. (promotor)
Simons, D.G. (copromotor)

Delft University of Technology

2022-10-14

Nowadays, large wind turbines are installed and operated close to densely populated areas due to the growing need for renewable energy. Noise constraints are hampering this development. The most relevant wind turbine noise source is the so-called Turbulent Boundary Layer Trailing-Edge (TBL–TE) noise. Many passive TBL–TE noise reduction technologies have been developed and tested in laboratories, yet only TE serrations are being implemented on real wind turbines. Some technologies, such as permeable TEs, have shown potential, according to wind-tunnel tests, to achieve higher TBL–TE noise reduction than the TE serrations. This thesis aims to advance the technological readiness level and industrial acceptance of the permeable TEs by maximizing their noise reduction capabilities while keeping their aerodynamic penalties limited. Design guidelines are derived based on both wind-tunnel aero-acoustic measurements and measurements of a real wind turbine featuring airfoil/blades equipped with a variety of TE noise reduction device prototypes.

Wind turbine
Trailing-edge noise
Trailing-edge serrations
Permeable materials
Microphone-array beamforming
Aero-acoustic wind-tunnel tests

https://doi.org/10.4233/uuid:23e2f72e-2502-4f4a-9504-ba607bae0364

2022-09-27

Institutional Repository

doctoral thesis

© 2022 S. Luesutthiviboon