FIELD: engines and pumps.
SUBSTANCE: aircraft nacelle comprises gas flow channel confined by, at least, concentric inner and outer walls covered, by at least, partially, by sound power absorption coating. At least, one spacer is arranged between inner and outer wall on section of channel length. Profile of spacer two walls comprises, at least, one concave section for increase in the number of acoustic beam reflection to sound power absorption coating. In compliance with another version, gas flow channel represents an engine secondary channel. Another invention of proposed set relates to aircraft equipped with above described nacelle.
EFFECT: higher efficiency of sound killing.
9 cl, 7 dwg
