On Prediction of Laminar Boundary Vortex Shedding Noise

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F23%3A00353139" target="_blank" >RIV/68407700:21220/23:00353139 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/5.0120026" target="_blank" >http://dx.doi.org/10.1063/5.0120026</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0120026" target="_blank" >10.1063/5.0120026</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On Prediction of Laminar Boundary Vortex Shedding Noise

Popis výsledku v původním jazyce

Prediction of aerodynamic self-noise is one of the critical topics in aeroacoustics. The prediction of airfoil self-noise is important for prediction of aerodynamic noise of low-speed rotors (such as wind turbines), wings and other wing-shape bodies. The noise signature can be also used to determine the boundary layer regime. This paper presents short analysis of the prediction method which can be used for prediction of laminar boundary vortex shedding noise. Laminar boundary vortex shedding noise exists (under some condition) when the laminar boundary layer is present up to the airfoil’s trailing edge. The vortex shedding noise is connected to the presence of Tollminen-Schlichting waves in the boundary layer. The emphasis of this analysis presented in this paper is on the fast and reliable prediction of the main aerodynamic noise parameters. This paper deals with two main key parameters of the aerodynamic noise – frequency and level of the generated noise. The prediction of the domain frequency and the prediction of the sound pressure level. The length scale for the scaling method of the laminar boundary vortex shedding noise is the boundary layer thickness. The final evaluated method was method of Brooks, Pope and Marcolini (BPM method). This method was validated against its original data. This paper also provides new validation of the BPM using experimental measured data for NACA 0012 at zero angle of attack for different Reynolds number than the original data was.

Název v anglickém jazyce

On Prediction of Laminar Boundary Vortex Shedding Noise

Popis výsledku anglicky

Prediction of aerodynamic self-noise is one of the critical topics in aeroacoustics. The prediction of airfoil self-noise is important for prediction of aerodynamic noise of low-speed rotors (such as wind turbines), wings and other wing-shape bodies. The noise signature can be also used to determine the boundary layer regime. This paper presents short analysis of the prediction method which can be used for prediction of laminar boundary vortex shedding noise. Laminar boundary vortex shedding noise exists (under some condition) when the laminar boundary layer is present up to the airfoil’s trailing edge. The vortex shedding noise is connected to the presence of Tollminen-Schlichting waves in the boundary layer. The emphasis of this analysis presented in this paper is on the fast and reliable prediction of the main aerodynamic noise parameters. This paper deals with two main key parameters of the aerodynamic noise – frequency and level of the generated noise. The prediction of the domain frequency and the prediction of the sound pressure level. The length scale for the scaling method of the laminar boundary vortex shedding noise is the boundary layer thickness. The final evaluated method was method of Brooks, Pope and Marcolini (BPM method). This method was validated against its original data. This paper also provides new validation of the BPM using experimental measured data for NACA 0012 at zero angle of attack for different Reynolds number than the original data was.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-4325-9

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

"020019-1"-"020019-6"

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Hotel Duo, Horní Bečva

Datum konání akce

13. 10. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—