Fundamental CFD Analysis on Main-Rotor/Tail-Rotor Interaction Noise of Helicopters

A fundamental analysis of a simple interaction between a rotor and a vortex externally generated from a vortex generator is numerically performed to clearly understand the phenomenon of main-rotor/tail-rotor (MR/TR) interaction noise of helicopters. A combined method of a 3D unsteady Euler CFD code...

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Bibliographic Details
Published in:Theoretical and Applied Mechanics Japan 2004, Vol.53, pp.215-220
Main Authors: AOYAMA, Takashi, YANG, Choongmo, KONDO, Natsuki, SAITO, Shigeru
Format: Article
Language:English
Online Access:Get full text
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Summary:A fundamental analysis of a simple interaction between a rotor and a vortex externally generated from a vortex generator is numerically performed to clearly understand the phenomenon of main-rotor/tail-rotor (MR/TR) interaction noise of helicopters. A combined method of a 3D unsteady Euler CFD code and an acoustic code based on the FW-H formulation is used. As a result, the effect of intersection angle and interaction position on the noise intensity was understood. The directivity of MR/TR interaction noise was also understood.
ISSN:1348-0693
1349-4244
DOI:10.11345/nctam.53.215