Wake Geometry Effects on Rotor Blade-Vortex Interaction Noise Directivity

By: Nasa, National Aeronautics and Space Adm

Acoustic measurements from a model rotor wind tunnel test are presented which show that the directionality of rotor blade vortex interaction (BVI) noise is strongly dependent on the rotor advance ratio and disk attitude. A rotor free wake analysis is used to show that the general locus of interactions on the rotor disk is also strongly dependent on advance ratio and disk attitude. A comparison of the changing directionality of the BVI noise with changes...

• Format: Paperback
• Language: English
• ISBN: 1728917212
• ISBN13: 9781728917214
• Release Date: January 1
• Publisher: Independently Published
• Length: 28 Pages
• Weight: 0.20 lbs.
• Dimensions: 0.1" x 8.5" x 11.0"