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Phased Array Aeroacoustic Measurements of an Unmanned Aerial Vehicle

Di Marco, Alessandro and Burghignoli, Lorenzo and Centracchio, Francesco and Camussi, Roberto and Ahlefeldt, Thomas and Henning, Arne and Müller, Jürg (2016) Phased Array Aeroacoustic Measurements of an Unmanned Aerial Vehicle. Internoise 2016, Hamburg, Deutschland.

Full text not available from this repository.

Official URL: http://www.internoise2016.org/

Abstract

This paper reports the results of the aeroacoustics study of an Unmanned Aerial Vehicle (UAV) experimentally investigated on a scaled prototype model. The measurement campaign were performed at the RUAG Large Subsonic Wind Tunnel in Emmen. The model was mounted on a ceiling strut in the 7by5 meters test section. The aeroacoustic noise generated by the UAV was evaluated analysing the pressure fluctuations acquired through a phased array of 144 microphones installed on a flatplate on the ground of the test section floor. Pressure fluctuations were acquired in different configurations. The main parameters varied during the tests were: the velocity of the airflow, the incidence angle of the UAV and the presence of the landing gears. Flaps were always deployed. The directivity source contribution to the overall noise at various emission angles is determined as well, for each configuration, moving the array along the flow direction. Data were processed and then analysed in the frequency domain and using a conventional beamforming algorithm to retrieve the sound source map over the areas of interest. Source maps were deconvolved with a CLEANSC routine and single source contributions determined through integration of autopowers. The resulting spectra were finally scaled to flight conditions.

Item URL in elib:https://elib.dlr.de/105913/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper Nr. 263; http://pub.dega-akustik.de/IN2016/data/articles/000263.pdf
Title:Phased Array Aeroacoustic Measurements of an Unmanned Aerial Vehicle
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Di Marco, AlessandroUniversity Roma TRE, ItalyUNSPECIFIED
Burghignoli, LorenzoUniversity Roma TRE, ItalyUNSPECIFIED
Centracchio, FrancescoUniversity Roma TRE, ItalyUNSPECIFIED
Camussi, RobertoUniversity Roma TRE, ItalyUNSPECIFIED
Ahlefeldt, Thomasthomas.ahlefeldt (at) dlr.deUNSPECIFIED
Henning, Arnearne.henning (at) dlr.deUNSPECIFIED
Müller, JürgRUAG Aviation, SwitzerlandUNSPECIFIED
Date:2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aeroacoustics, Beamforming, UAV: 21.6
Event Title:Internoise 2016
Event Location:Hamburg, Deutschland
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Bachmann, Barbara
Deposited On:16 Dec 2016 12:27
Last Modified:16 Dec 2016 12:27

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