The invention relates to a nacelle structure (10) surrounding a blower, including an air inlet sleeve (100) having an inner surface (100A) defining an air supply channel; and at least one ring (22) arranged in said air inlet sleeve and selectively movable between a deployed position in which said ring is radially inwardly moved from the inner surface in order to provide an obstacle to the shock waves from the blower, and a retracted position in which the ring is radially outwardly moved from the deployed position such as to become flush with the inner surface and thus reconstitute the air supply channel.
Acoustically optimized air inlet sleeve
23.09.2015
Patent
Elektronische Ressource
Englisch
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