Thesis defence C.A. Arce León: trailing edge serrations

14 September 2017 15:00 - Location: Aula, TU Delft - By: Webredactie

A Study on the Near-Surface Flow and Acoustic Emissions of Trailing Edge Serrations. Promotor: Prof.dr. F. Scarano (LR).

Wind turbine noise emissions, as for any other industrial facilities, are strictly regulated in most of the commercially critical markets.

Research leading to the better understanding of technology that can help reduce these emissions could then have a greatly beneficial impact on the insertion of renewable energy, and has a very real potential to help lower the of the cost of energy.

One such technology is investigated in this research. Trailing edge serrations are already known and applied at industrial scale, but the fundamentals of why they help reduce noise in blades are not quite clear yet.

This work presents cutting edge measurements with particle image velocimetry (PIV) that helped uncover many previously unresolved details of the flow field around serrations. The study is further complimented with acoustic beamforming measurements, used to quantify the noise emissions of different serration and airfoil configurations.


The results compliment the state-of-the-art knowledge on the working mechanism of trailing edge serrations. They are further used to suggest how to improve industry-level serration designs, and discuss the potential to achieve additional noise reduction.

More information?
For access to theses by the PhD students you can have a look in TU Delft Repository, the digital storage of publications of TU Delft. Theses will be available within a few weeks after the actual thesis defence.