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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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'
|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|
|Date:||23 January 2007|
|Journal or Publication Title:||Journal of Sound and Vibration|
|In ISI Web of Science:||Yes|
|Volume:||Volume 299,Issue 3|
|Page Range:||pp. 419-459|
|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|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L RR - Rotorcraft Research|
|DLR - Research theme (Project):||L - The Quiet and Comfortable Rotorcraft|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology|
|Deposited By:||Dr.-Ing. Jianping Yin|
|Deposited On:||23 Jul 2007|
|Last Modified:||27 Apr 2009 13:22|
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