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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, Seiten 419-459. ISSN 0022-460x.

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Kurzfassung

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'

Dokumentart:Zeitschriftenbeitrag
Titel: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
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Yin, JianpingNICHT SPEZIFIZIERT
Datum:23 Januar 2007
Erschienen in:Journal of Sound and Vibration
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:Volume 299,Issue 3
Seitenbereich:Seiten 419-459
ISSN:0022-460x
Status:veröffentlicht
Stichwörter:HeliNOVI , Helicopter Noise and vibration reduction, AEROACOUSTIC MAIN ROTOR/TAIL ROTOR/FUSELAGE ,Tail Rotor NOISE reduction, PIV, Acoustic, Blade pressure
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Drehflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L RR - Drehflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Der leise und komfortable Drehflügler
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik
Hinterlegt von: Dr.-Ing. Jianping Yin
Hinterlegt am:23 Jul 2007
Letzte Änderung:27 Apr 2009 13:22

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