Boundary layer development and flow-induced noise of airfoils: The effect of high inflow turbulence on trailing-edge noise generation

Laura Botero Bolivar

Research output: ThesisPhD Thesis - Research UT, graduation UT

86 Downloads (Pure)

Abstract

Human factors regarding wind turbines have come into play in recent years, primarily due to the aerodynamic noise. The primary noise source of a wind turbine is trailing-edge noise. However, when the inflow is turbulent, which is a predominant condition for wind turbines, leading-edge noise becomes an additional source of noise. The effect of the inflow turbulence on trailing-edge noise generation has yet to be studied. Therefore, this thesis first studies trailing-edge noise generation for uniform inflow conditions by analyzing the boundary layer development. Later, the analyses are extended for the turbulent inflow condition. The results show the strong influence of the inflow turbulence on the boundary layer development and trailing-edge noise. Finally, this thesis presents a methodology to predict wind turbine noise. The results found in this thesis contribute to a better understanding and evaluation of noise generation with and without inflow turbulence for airfoils, which is relevant for wind turbines and other applications. Accounting for the influence of inflow turbulence on trailing-edge noise is pivotal for accurately assessing aerodynamic noise and for designing effective noise mitigation strategies for a particular frequency range.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • Venner, Cornelis H., Supervisor
  • de Santana, Leandro D., Co-Supervisor
Award date1 Mar 2024
Place of PublicationEnschede
Publisher
Print ISBNs978-90-365-5989-8
Electronic ISBNs978-90-365-5990-4
DOIs
Publication statusPublished - 1 Mar 2024

Keywords

  • Wind turbine noise
  • Trailing-edge noise
  • Leading-edge noise
  • Boundary layer
  • Inflow turbulence
  • Wind tunnel experiments
  • Amiet's theory

Fingerprint

Dive into the research topics of 'Boundary layer development and flow-induced noise of airfoils: The effect of high inflow turbulence on trailing-edge noise generation'. Together they form a unique fingerprint.

Cite this