This paper is concerned with an analytical study of the noise from a vibrating propeller. The influence of airfoil thickness as well as steady loading are also included in order to provide a basis for comparison. The analysis was based on the concept of distributing sources and doublets on the surface of the blade, which were multiplied by their appropriate strength factors. The noise in the plane of the propeller was dominated by the thickness noise. When the observation point was rotated ahead of the propeller plane, the steady state load noise and the vibration noise were greater than the thickness noise. Moving the observer's position to the propeller axis, the thickness noise and loading noise were zero, and a pure sinusoidal noise was found, caused by the vibrations of the propeller. (Krautzig)
Noise from a vibrating propeller
Vibrationslaerm vom Propeller
AIAA-Papers ; 1-7
1980
7 Seiten, 5 Bilder, 1 Tabelle, 3 Quellen
Conference paper
English
Noise from a vibrating propeller
AIAA | 1980
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