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Acoustical Methods and Experiments for Studying Rotorcraft Fuselage Scattering

Yin, Jianping and Rossignol, Karl-Stéphane and Barbarino, Mattia and Bianco, Davide and Testa, Claudio and Brouwer, Harry and Janssen, Stevie Ray and Reboul, Gabriel and Vigeva, Luigi and Bernardini, Giovanni and Gennaretti, Massimo and Serafini, Jacopo and Poggi, Caterina (2017) Acoustical Methods and Experiments for Studying Rotorcraft Fuselage Scattering. 43rd European Rotorcraft Forum (ERF) 2017, 12-15 September 2017, Milan, Italien.

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Abstract

This paper deals the activities conducted in the GARTEUR Action Group HC/AG-24 to address noise scattering of helicopter rotors in presence of the fuselage. The focus of the Action Group is on the development and validation of numerical prediction methods and establishing an experimental data base for numerical validations. The numerical methods applied by most partners solve the Helmholtz equation using a Boundary Element Method for addressing the discretized Green’s function integral formulation of the solution. The test activities are conducted in the DLR Acoustic Wind Tunnel in Braunschweig (AWB), including acoustic scattering tests by spheres and a generic helicopter model. In the current paper, the results from the numerical simulations, the wind tunnel tests as well as numerical and test comparisons are addressed. The test configurations include the spheres with sting support and a finite NACA0012 wing (thanks to share data with a NATO STO group). The acoustic predictions of the scattering by spheres will be compared with the analytic solution to address the influence of the sphere support systems at different wind speeds. The acoustic predictions of the scattering by NACA0012 wing will be analyzed and compared to available test results for different source locations and frequencies.

Item URL in elib:https://elib.dlr.de/116717/
Document Type:Conference or Workshop Item (Speech)
Title:Acoustical Methods and Experiments for Studying Rotorcraft Fuselage Scattering
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Yin, JianpingJianping.Yin (at) dlr.deUNSPECIFIED
Rossignol, Karl-StéphaneKarl-Stephane.Rossignol (at) dlr.deUNSPECIFIED
Barbarino, Mattiam.barbarino (at) cira.itUNSPECIFIED
Bianco, Davided.bianco (at) cira.itUNSPECIFIED
Testa, Claudioclaudio.testa (at) cnr.itUNSPECIFIED
Brouwer, HarryHarry.Brouwer (at) nlr.nlUNSPECIFIED
Janssen, Stevie RayStevie.Ray.Janssen (at) nlr.nlUNSPECIFIED
Reboul, Gabrielgabriel.reboul (at) onera.frUNSPECIFIED
Vigeva, Luigiluigi.vigevano (at) polimi.itUNSPECIFIED
Bernardini, Giovannig.bernardini (at) uniroma3.itUNSPECIFIED
Gennaretti, Massimom.gennaretti (at) uniroma3.itUNSPECIFIED
Serafini, Jacoposerafini (at) uniroma3.itUNSPECIFIED
Poggi, Caterinapoggicaterina (at) yahoo.itUNSPECIFIED
Date:September 2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Helicopter Acoustics, Rotorcraft Fuselage Scattering, Computational Aero-Acoustiacoustic, scattering test, shielding experiments,spheres, noise Propagation, analytical solution, DLR Laser generated Sound,DLR Acoustic Wind Tunnel, GARTEUR
Event Title:43rd European Rotorcraft Forum (ERF) 2017
Event Location:Milan, Italien
Event Type:international Conference
Event Dates:12-15 September 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Quiet und Comfortable Rotorcraft
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Yin, Dr.-Ing. Jianping
Deposited On:13 Dec 2017 09:54
Last Modified:13 Dec 2017 09:54

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