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AERODYNAMIC INTERFERENCE IN FULL HELICOPTER CONFIGURATIONS: VALIDATION USING THE HELINOVI DATABASE

Visingardi, Antonio und Dummel, Andreas und Falchero, Daniele und Pidd, Mike und Prospathopoulos, John und Voutsinas, Spyros G und Yin, Jianping (2006) AERODYNAMIC INTERFERENCE IN FULL HELICOPTER CONFIGURATIONS: VALIDATION USING THE HELINOVI DATABASE. In: European Rotorcraft Forum. 32st ERF 2006, AE19, 2006-12-09 - 2006-14-09, Maastricht (NL).

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Kurzfassung

The present paper summarizes the results obtained during the validation phase of the aerodynamic computational tools performed in the framework of the European research project HeliNOVI and relative to the interactional phenomena arising on a full helicopter configuration. The activity was carried out by exploiting the experimental database produced during the wind tunnel test campaign of the project for a 40% Mach and dynamically scaled BO105 helicopter model. Seven test cases were performed. A climb, a descent and a level flight were chosen as baseline test cases aiming at highlighting the phenomenological differ-ences among three main helicopter flight conditions. The remaining four were dedicated to the analysis of possible tail rotor (TR) modifications in order to alleviate those interactional aspects responsible for high TR noise emissions. The experimental results indicate a low influence of the main rotor (MR) as source noise in 12° climb and 60m/s level flight whereas a predominance during the descent flight because of MR blade vortex interactions. Conversely, the TR noise represents the main source of noise especially in climb flight whereas is irrelevant during the descent flight. The modification of the TR operational characteristics is effective in reducing the interactional aspects and thus the noise emission. The numerical-experimental comparisons highlight the extreme complexity of the aerodynamic phenomena arising on a helicopter during flight. The numerical computations sometimes provide different predictions. It is a common opinion that they are motivated by the summation of the differences in the methodologies as well as trim procedures applied rather than by a specific reason only.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel: AERODYNAMIC INTERFERENCE IN FULL HELICOPTER CONFIGURATIONS: VALIDATION USING THE HELINOVI DATABASE
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Visingardi, AntonioCentro Italiano di Richerche Aerospaziali (CIRA), Italy
Dummel, AndreasEurocopter Deutschland (ECD), Germany
Falchero, DanieleEurocopter SAS (EC), France
Pidd, MikeQinetiQ Ltd, United Kingdom
Prospathopoulos, JohnNational Technical University of Athens (NTUA), Greece
Voutsinas, Spyros GNational Technical University of Athens (NTUA), Greece
Yin, JianpingNICHT SPEZIFIZIERT
Datum:September 2006
Erschienen in:European Rotorcraft Forum
Status:veröffentlicht
Stichwörter:Aerodynamic interference, helicopter, HeliNOVI, numerical simulation, tail rotor noise re-duction
Veranstaltungstitel:32st ERF 2006, AE19
Veranstaltungsort:Maastricht (NL)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-12-09 - 2006-14-09
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:02 Jan 2007
Letzte Änderung:27 Apr 2009 13:22

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