Helicopter main-rotor/tail-rotor interaction
Helicopter main-rotor/tail-rotor interaction
- New search for: Yin, J.P.
- New search for: Ahmed, S.R.
- New search for: Yin, J.P.
- New search for: Ahmed, S.R.
Preliminary results from a study to model the interaction aerodynamics and aeroacoustics of the main- and tail rotor of a helicopter in subsonic flow are presented. The configurations studied are: 1) two-bladed main- and tail rotors in hover, and 2) a four-bladed main rotor and two-bladed tail rotor in climbing flight. The unsteady pressure on the main- and tail rotor surfaces is computed with an unsteady 3-D panel method with full-span free wake simulation of the simultaneously rotating rotors. The computed pressures serve as input to a Ffowcs Williams Hawkings-equation based acoustic code to evaluate the noise characteristics. For the hover configuration, the parameters varied were the distance between the rotor axes and the sense of rotation of the tail rotor. Presence of the main rotor has a significant effect on the noise directivity and noise level of the tail rotor. Noise contribution of the tail rotor dominates during the climb.
Document information
Helicopter main-rotor/tail-rotor interaction
Wechselwirkung zwischen dem Haupt- und Heckrotor eines Hubschraubers
Journal of the American Helicopter Society ; 45 , 4 ; 293-302
2000
10 Seiten, 18 Bilder, 22 Quellen
Article (Journal)
English
Abstrahlcharakteristik , Aerodynamik , Akustik , Auftriebsbeiwert , Drehrichtung , dreidimensionale Strömung , Fluktuation (Physik) , Hubschrauber , Last (mechanisch) , numerische Strömungssimulation , numerisches Verfahren , Panel-Verfahren , Rotor (Drehflügel) , Schallabstrahlung , Schweben , Strömungsfeld , Wechselwirkung , Wirbelströmung , Nachlaufströmung
Similar titles
Technical Note - Helicopter Main- Rotor-Tail- Rotor Interaction
| Online Contents | 2000
Modelling the interaction of helicopter main rotor and tail rotor wakes
| Online Contents | 2007
Main Rotor--Tail Rotor Interaction and Its Implications for Helicopter Directional Control
| Online Contents | 2008