PROCEDURE FOR DE-ICING A JET ENGINE AIR INLET COWL AND DEVICE FOR APPLYING THE SAID PROCEDURE

摘要

- The object of the invention relates to a method of deicing an air intake hood (5) of a jet engine comprising an air intake lip (6a) and a de-icing system ( 10) and acoustic attenuation means (11) characterized in that it consists in constituting said acoustic attenuation means by separate islands (11a) each formed of a sandwich comprising an acoustically resistive porous layer forming part of the outer envelope (6i) of the fan duct delimited by said air inlet lip, a honeycomb core and a reflector (13), to be sent into the lip, preferably in the direction of said acoustic attenuation islands, pressurized hot fluid of said de-icing system and to escape said fluid outside said hood, by one or more orifices (20) of appropriate shape and dimensions, formed in said hood. - Application to jet engines of aircraft