Sound propagation corrections in open jet wind tunnels

Julian Biesheuvel

doi:10.3990/1.9789036554541

Sound propagation corrections in open jet wind tunnels

Julian Biesheuvel

Engineering Fluid Dynamics

Research output: Thesis › PhD Thesis - Research UT, graduation UT

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Abstract

Noise produced by aircraft, wind turbines or drones is an increasing societal challenge. In order to develop more silent technology new silent designs are tested in wind tunnels. The wind tunnel environment, however, is different from the real world. Therefore, corrections are made to properly predict the acoustics of the application in the real world. Acoustic corrections, specifically aimed to be used in acoustic imaging techniques, are the topic of this thesis. The work is split into two parts. The first part concerns efficient mean flow corrections. The second part presents a method to improve the resolution of acoustic images when the acoustic waves propagate through a turbulent medium. The thesis begins with a background on sound propagation, including common correction
models used within acoustic imaging techniques. Furthermore, the fundamentals of acoustic imaging by means of the beamforming method are described.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	University of Twente
Supervisors/Advisors	Venner, Cornelis H., Supervisor De Santana, Leandro Dantas, Co-Supervisor Tuinstra, Marthijn, Co-Supervisor
Award date	5 Oct 2022
Place of Publication	Enschede
Publisher	University of Twente
Print ISBNs	978-90-365-5454-1
DOIs	https://doi.org/10.3990/1.9789036554541
Publication status	Published - 5 Oct 2022

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title = "Sound propagation corrections in open jet wind tunnels",

abstract = "Noise produced by aircraft, wind turbines or drones is an increasing societal challenge. In order to develop more silent technology new silent designs are tested in wind tunnels. The wind tunnel environment, however, is different from the real world. Therefore, corrections are made to properly predict the acoustics of the application in the real world. Acoustic corrections, specifically aimed to be used in acoustic imaging techniques, are the topic of this thesis. The work is split into two parts. The first part concerns efficient mean flow corrections. The second part presents a method to improve the resolution of acoustic images when the acoustic waves propagate through a turbulent medium. The thesis begins with a background on sound propagation, including common correctionmodels used within acoustic imaging techniques. Furthermore, the fundamentals of acoustic imaging by means of the beamforming method are described.",

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T1 - Sound propagation corrections in open jet wind tunnels

AU - Biesheuvel, Julian

PY - 2022/10/5

Y1 - 2022/10/5

N2 - Noise produced by aircraft, wind turbines or drones is an increasing societal challenge. In order to develop more silent technology new silent designs are tested in wind tunnels. The wind tunnel environment, however, is different from the real world. Therefore, corrections are made to properly predict the acoustics of the application in the real world. Acoustic corrections, specifically aimed to be used in acoustic imaging techniques, are the topic of this thesis. The work is split into two parts. The first part concerns efficient mean flow corrections. The second part presents a method to improve the resolution of acoustic images when the acoustic waves propagate through a turbulent medium. The thesis begins with a background on sound propagation, including common correctionmodels used within acoustic imaging techniques. Furthermore, the fundamentals of acoustic imaging by means of the beamforming method are described.

AB - Noise produced by aircraft, wind turbines or drones is an increasing societal challenge. In order to develop more silent technology new silent designs are tested in wind tunnels. The wind tunnel environment, however, is different from the real world. Therefore, corrections are made to properly predict the acoustics of the application in the real world. Acoustic corrections, specifically aimed to be used in acoustic imaging techniques, are the topic of this thesis. The work is split into two parts. The first part concerns efficient mean flow corrections. The second part presents a method to improve the resolution of acoustic images when the acoustic waves propagate through a turbulent medium. The thesis begins with a background on sound propagation, including common correctionmodels used within acoustic imaging techniques. Furthermore, the fundamentals of acoustic imaging by means of the beamforming method are described.

U2 - 10.3990/1.9789036554541

DO - 10.3990/1.9789036554541

M3 - PhD Thesis - Research UT, graduation UT

SN - 978-90-365-5454-1

PB - University of Twente

CY - Enschede

ER -

Sound propagation corrections in open jet wind tunnels

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