Benchmarking of the NACA 633-018 Trailing-Edge Noise in a Broad Reynolds Number Range as Part of the IEA Task 39

Conference paper (2022)

Authors

G. Vergés i Plaza Technical University of Denmark, Student
Andreas Fischer Technical University of Denmark
Oliver Lylloff Technical University of Denmark
Christian Bak Technical University of Denmark
Anders S. Olsen Technical University of Denmark
S. Luesutthiviboon Reflection & Lifestyle ,
L.T. Lima Pereira Wind Energy - Aerospace Engineering
D. Ragni Wind Energy - Aerospace Engineering
F. Avallone Wind Energy - Aerospace Engineering
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Research Group
Wind Energy (Aerospace Engineering) (TU Delft)
Copyright: © 2022 G. Vergés i Plaza, Andreas Fischer, Oliver Lylloff, Christian Bak, Anders S. Olsen, S. Luesutthiviboon, L.T. Lima Pereira, D. Ragni, F. Avallone, More Authors
DOI
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https://doi.org/10.2514/6.2022-2981
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Published Date

2022

Language

English

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Faculty

Aerospace Engineering

Department

Flow Physics and Technology

Research Group

Wind Energy

Abstract

An experimental aero-acoustic characterisation of the NACA 63
3-018 airfoil is presented in this study, featuring trailing-edge noise emissions with and without serrations. Measurements have been carried out for a chord-based Reynolds number range between 0.18 × 10
6 and 4.8 × 10
6 . Two airfoil models with different chord lengths have been tested in five different wind tunnels. The goal is to compare the measurements in different facilities, quantify the uncertainties, and establish a validation database that can serve as a benchmark for computational studies. The tests have been performed with clean and forced-transition boundary layers for a variety of angles of attack. The effect on the spectral slope and peak levels is evaluated. Scaling laws have been applied to compare different test conditions. The quality and nature of the collapse, as well as the applicability limits of the scaling, are examined. Different serration geometries have been tested at different flap angles. The noise reduction dependence on the aerodynamic loading is discussed. This work is based on an initiative of Task 39 "Quiet Wind Turbine Technology" of the Technology Collaboration Programme (TCP) of the International Energy Agency (IEA).

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