Defrosting procedure forced-fluid, the air inlet cover of a jet engine and device for its practice.

摘要

Defrost procedure housing air inlet (5) of a jet engine, comprising a lip air inlet (6), a system (10, 1) deicing the feed lip with a hot fluid under pressure and means (11) acoustic attenuation forming an integral part of a given area of ​​said lip, characterized in that consists of forming the said acoustic attenuation means by separate islands (12, 24, 28) each constituted by a sandwich comprising an acoustically resistive porous layer forming a part (13, 13¿) of the outer envelope of the blowing channel delimited by the said air inlet lip, a honeycomb core mono or pluricapa and a reflector (15, 15¿) in forming or coating the reflector of each of the islets by a common element (15, 15¿) extending over all the islands (12, 24, 28), in effecting communication between the spaces defined or tre islets, on the one hand with the inside of the lip (5) and, on the other hand, with the outside of the cover (5) so that a forced circulation of de-icing fluid is engendered from inside the lip outward of said cover or through the spaces defined between the islets.