Patent ID: 6241189
Filing Date: 2001-06-05
Classification: B64D,F02C,Y02T

Abstract:
An air inlet cowl (9) for a jet engine (1) especially for an aircraft, said air inlet cowl (9) having an external wall (9E) with an internal face (9Ei) and being equipped with means for deicing its leading edge, and comprising:a hollow leading edge (16) delimiting an internal peripheral chamber (21) closed by a first internal partition (20) and equipped with at least one orifice (18) placing said internal chamber (21) in communication with the outside;a pipe (10) which can be connected, at its rear end away from said leading edge (16) and passing through a second internal partition (24), to a pressurized hot air circuit (14) and, at its front end toward said leading edge (16), to an injector (12) injecting said hot air into said internal chamber (21), said injected hot air being evacuated from said internal chamber (21) through said orifice (18) in said internal chamber (21); andheat sensitive structures (26) disposed between said first and second internal partitions (20 and 24),said air inlet cowl (9) further comprising:an internal casing (27) disposed between said first and second internal partitions (20 and 24) and delimiting with said internal partitions and with said internal face (9Ei) a volume (28) enclosing said pipe (10), said internal casing (27) protecting said heat sensitive structures (26) against the heat radiated by said pipe (10), against the leaks of pressurized hot air from said pipe (10) and against said pipe exploding; andat least one inlet orifice (34 or 35) for letting air into said volume (28) and at least one outlet orifice (35 or 34) for extracting air from said volume (28), said volume (28) being in communication with the outside via at least one of said orifices, so that said volume (28) is permanently ventilated by ventilation air (36) taking away the heat radiated by said pipe (10).