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Aeroacoustics research in Europe: The CEAS-ASC report on 2005 highlights (edited by Spyros G. Voutsinas): 7.2. Acoustic and aerodynamic test results from HeliNOVI main rotor/tail rotor/fuselage test in DNW

Yin, Jianping (2007) Aeroacoustics research in Europe: The CEAS-ASC report on 2005 highlights (edited by Spyros G. Voutsinas): 7.2. Acoustic and aerodynamic test results from HeliNOVI main rotor/tail rotor/fuselage test in DNW. Journal of Sound and Vibration, Volume 299,Issue 3, pp. 419-459. ISSN 0022-460x

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Abstract

In the framework of the European HeliNOVI project, an acoustic DNW wind tunnel study was conducted into helicopter tail rotor noise. The goal of the tests was to investigate (1) the importance of tail rotor noise for different flight conditions (2) main rotor/tail rotor interaction noise, and (3) tail rotor noise reduction concepts. Besides the conventional measurement techniques, such as an inflow microphone traverse, blade pressure transducers and PIV, an out-of-flow phased microphone array was applied to locate and quantify the different helicopter noise sources. The test results indicate that tail rotor noise is most important for climb and high-speed level flight. Furthermore, it is found that main rotor/tail rotor interactions only have a small effect on the overall noise levels. After a reduction of rotor tip speed, the most efficient tail rotor noise reduction concept involves changing the tail rotor sense of rotation from 'advancing side down' to 'advancing side up'

Item URL in elib:https://elib.dlr.de/46535/
Document Type:Article
Title:Aeroacoustics research in Europe: The CEAS-ASC report on 2005 highlights (edited by Spyros G. Voutsinas): 7.2. Acoustic and aerodynamic test results from HeliNOVI main rotor/tail rotor/fuselage test in DNW
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Yin, JianpingUNSPECIFIEDUNSPECIFIED
Date:23 January 2007
Journal or Publication Title:Journal of Sound and Vibration
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:Volume 299,Issue 3
Page Range:pp. 419-459
ISSN:0022-460x
Status:Published
Keywords:HeliNOVI , Helicopter Noise and vibration reduction, AEROACOUSTIC MAIN ROTOR/TAIL ROTOR/FUSELAGE ,Tail Rotor NOISE reduction, PIV, Acoustic, Blade pressure
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Yin, Dr.-Ing. Jianping
Deposited On:23 Jul 2007
Last Modified:27 Apr 2009 13:22

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