Air inlet for aircraft propulsion unit having a structure resistant to excess pressure and a process for repairing an air inlet of an aircraft propulsion unit

摘要

An air inlet for nacelle of an aircraft propulsion unit comprising an inner envelope provided with a plurality of orifices for passage of fluid passing through the envelope, and a lip connected to the upstream edge of the inner envelope, and having a portion devoid of orifices for passage of fluid with an axial span of between 20% and 90% of the span of the inner envelope, and a circumferential span a of between 60° and 150° about a longitudinal axis of the air inlet. A process for repairing an air inlet comprising cutting out a recess in an upstream edge of an inner envelope of the air inlet, then arranging and fixing an impermeable panel in the recess so as to create an air inlet of the type described above.

主权项

1. An air inlet for the nacelle of an aircraft propulsion unit comprising a substantially annular outer cowling, a substantially annular inner envelope intended to delimit a channel feeding air to a turbojet engine and comprising a plurality of fluid passage orifices passing through said envelope, and a substantially annular lip connected to respective upstream edges of said outer cowling and of said inner envelope so as to form a leading edge of said air inlet, wherein the inner envelope has a portion devoid of fluid passage orifices extending axially from an upstream edge of said inner envelope over a distance L of between 20% and 90% of the mean axial span of said inner envelope and having a circumferential span a of between 60° and 150° about a longitudinal axis of said air inlet.