| 摘要 |
The invention relates to a process for de-icing an air intake cowling of a reaction motor, comprising a lip (6a), a de-icing system (10) for the lip and acoustic attenuation means (11) characterized in that it consists in constituting said acoustic attenuation means by separate islands (12) each formed of a sandwich comprising an acoustically resistive porous layer forming a portion (13) of the external envelope of the fan channel limited by said lip, a cellular core and a deflector (15), in constituting or covering the reflector of each island with the help of a common element (15) extending over all the islands (12), emplacing in communication the space or spaces between islands, on the one hand, with the interior of the lip (6a) and, on the other hand, with the exterior of the cowling so as to create a forced circulation of de-icing fluid from the interior of the lip to the outside of said cowling.
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