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European helicopter rotor noise research - Highlights of recent projects

Splettstößer, W.R. (1999) European helicopter rotor noise research - Highlights of recent projects. 2nd Convention of the European Acoustics Association, Forum Acusticum, 14.-19.03.1999.

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Kurzfassung

Significant advances in understanding, modeling, and controlling helicopter rotor noise have been made in the course of several major European aeroacoustic research projects over the past years. The availability of the German-Dutch Wind Tunnel (DNW), in particular, has enabled research on relatively large main rotor models (up to typically 40% full scale). Here, the simultaneous application and use of blade-mounted absolute pressure sensors to study the very aeroacoustic source mechanisms, of advanced acoustic-data acquisition systems for the radiated noise, of non-intrusive flow visualization as well as flow and blade deflection measurement techniques to investigate the rotor wake and the blade dynamic response has provided much insight into the physics of rotor aeroacoustics, particularly into the rotor blade-vortex interaction (BVI) impulsive noise phenomenon. In efforts towards controlling BVI impulsive noise, in some research projects, active blade-root control techniques have been investigated to favorably affect the BVI geometry and thus minimize the impulsive noise radiation. Much of the experimental data acquired served as benchmark information to enhance the mathematical modeling of the rotor wake, the rotor airloads, and the noise radiation. In this lecture, several major European helicopter aeroacoustic research projects are discussed.

Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen: LIDO-Berichtsjahr=1999,
Titel:European helicopter rotor noise research - Highlights of recent projects
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Splettstößer, W.R.NICHT SPEZIFIZIERT
Datum:1999
Status:veröffentlicht
Veranstaltungstitel:2nd Convention of the European Acoustics Association, Forum Acusticum, 14.-19.03.1999
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L DT - Drehflüglertechnologien
DLR - Teilgebiet (Projekt, Vorhaben):L - Der leise und komfortable Drehflügler
Standort: Köln-Porz , Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Institut für Entwurfsaerodynamik
Hinterlegt von: Claudia Grant
Hinterlegt am:16 Sep 2005
Letzte Änderung:14 Jan 2010 20:07

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