This paper investigates the influence of the torque ratio, at constant total thrust, on the interaction noise of a generic counter-rotating open rotor in pusher configuration. It is shown that torque ratio has a small influence on the open-rotor aerodynamic performance but a strong impact on interaction noise at takeoff condition. The noise source mechanisms are investigated in detail and linked with the characteristics of the front rotor blade-tip vortices. Tip vortex characteristics are detailed and compared with analytical vortex models. It is verified that torque ratio variation has no strong impact on the open-rotor aerodynamic performance at cruise condition.
Influence of Torque Ratio on Counter-Rotating Open-Rotor Interaction Noise
AIAA Journal ; 53 , 9 ; 2726-2738
2015-04-08
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Influence of Torque Ratio on Counter-Rotating Open-Rotor Interaction Noise
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