Pregled bibliografske jedinice broj: 957507
Experimental Assessment of Aerodynamic Noise on an Airfoil Surface
Experimental Assessment of Aerodynamic Noise on an Airfoil Surface // The 8th Congress of the Alps Adria Acoustics Association – Conference Proceedings / Horvat, Marko ; Krhen, Miljenko (ur.).
Zagreb: Hrvatsko akustičko društvo (HAD), 2018. str. 178-182 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 957507 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Experimental Assessment of Aerodynamic Noise on an Airfoil Surface
Autori
Fujs, David ; Bucak, Tino ; Franjković, Davor
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
The 8th Congress of the Alps Adria Acoustics Association – Conference Proceedings
/ Horvat, Marko ; Krhen, Miljenko - Zagreb : Hrvatsko akustičko društvo (HAD), 2018, 178-182
ISBN
978-953-95097-2-7
Skup
The 8th Congress of the Alps Adria Acoustics Association
Mjesto i datum
Zagreb, Hrvatska, 20.09.2018. - 21.09.2018
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
aerodynamic noise, acoustics, piezoelectric transducers, sensors, condition amplifiers, airfoil NACA 2421, experimental measurements, FFT analysis
Sažetak
This paper describes the aerodynamic noise measurement method on an airfoil surface in laboratory conditions with non-standard equipment. The experiment and the measurements were performed in closed subsonic wind tunnel at the Aerodynamic Laboratory of Faculty of Transport and Traffic Sciences, University of Zagreb. To complete the measurement set, a charge amplifier and 3D printed airfoil model with six simple piezoelectric sensors were designed. The sensors were used for the airfoil surface noise assessment at different angles of attack and air stream velocities in the tunnel. After relayed through 6-way selector switch, the signal from each sensor under various conditions was suitably conditioned by the charge amplifier and recorded on PC for post-process data analysis. The paper gives the results of FFT analysis and offers discussion about observed correlations between absolute value of angle of attack and low frequency noise levels and spectra, especially prominent while gradually approaching critical angle of attack, the point where stalling of the airfoil occurs.
Izvorni jezik
Engleski
Znanstvena područja
Tehnologija prometa i transport, Zrakoplovstvo, raketna i svemirska tehnika, Interdisciplinarne tehničke znanosti
POVEZANOST RADA
Ustanove:
Fakultet prometnih znanosti, Zagreb
