Blade-vortex interaction is the source mechanism for a prominent impulsive noise created by rotorcraft. An experimental study of two-dimensional blade-vortex interaction was performed to determine controlling parameters governing the strength of the blade-vortex interaction process. The interaction process is shown to involve a combination of effects on the vortex, including changes in trajectory and distortion of the vortex core shape while the blade undergoes significant transient loading. Calculation of the acoustic field produced by the interaction using measured unsteady blade surface pressure data are presented. The effects of the interaction process on the blade and the vortex are shown to be increased by both reduction of blade-to-vortex spacing and increase in blade loading.
Experimental observations of two-dimensional blade-vortex interaction
Experimentelle Beobachtung von zweidimensionaler Schaufelblatt-Wirbel-Wechselwirkung
AIAA Journal ; 28 , 8 ; 1353-1359
1990
7 Seiten, 6 Bilder, 22 Quellen
Article (Journal)
English
NTRS | 1989
|AIAA | 1987
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