Measurement analysis of aerodynamic noise in low speed wind tunnel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00332317" target="_blank" >RIV/68407700:21220/19:00332317 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.5114770" target="_blank" >http://dx.doi.org/10.1063/1.5114770</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5114770" target="_blank" >10.1063/1.5114770</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement analysis of aerodynamic noise in low speed wind tunnel

Popis výsledku v původním jazyce

Measurement of aerodynamic noise generated by a body in the airflow or the turbulent flow itself is crucial for today’s aerodynamic development. For accurate acoustic measurement of aerodynamic noise generated by surfaces in the airflow special facility is usually required. This paper analyzes an approach for measuring base integral characteristics of aerodynamic noise (sound pressure levels) generated by a body in the airflow inside the section of the low speed wind tunnel. Initially the noise generated by the wind tunnel, its driving unit and the ambient noise were considered. The noise generated by the wind tunnel is not only of the aerodynamic nature, but for some operating conditions the magnetic noise is the most dominant part of the sound emissions. From this point of view the measurement requirement and limitations were further considered. In the second part of this analysis an anechoic chamber around the open test section of the wind tunnel was built. Inside this anechoic chamber three 1/4” microphones were mounted. The measurement of the sound pressure levels at the specific points in the anechoic chamber was performed. The results of this measurement were evaluated and discussed the further usage of this approach to the aerodynamic generated noise measurement.

Název v anglickém jazyce

Measurement analysis of aerodynamic noise in low speed wind tunnel

Popis výsledku anglicky

Measurement of aerodynamic noise generated by a body in the airflow or the turbulent flow itself is crucial for today’s aerodynamic development. For accurate acoustic measurement of aerodynamic noise generated by surfaces in the airflow special facility is usually required. This paper analyzes an approach for measuring base integral characteristics of aerodynamic noise (sound pressure levels) generated by a body in the airflow inside the section of the low speed wind tunnel. Initially the noise generated by the wind tunnel, its driving unit and the ambient noise were considered. The noise generated by the wind tunnel is not only of the aerodynamic nature, but for some operating conditions the magnetic noise is the most dominant part of the sound emissions. From this point of view the measurement requirement and limitations were further considered. In the second part of this analysis an anechoic chamber around the open test section of the wind tunnel was built. Inside this anechoic chamber three 1/4” microphones were mounted. The measurement of the sound pressure levels at the specific points in the anechoic chamber was performed. The results of this measurement were evaluated and discussed the further usage of this approach to the aerodynamic generated noise measurement.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1858-5

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

"030042-1"-"030042-4"

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Liptovský Mikuláš

Datum konání akce

19. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—