Ventilation of turbojet nacelle is obtained by means of cavities in structural arms of enclosure in turbine rear and orifices in exhaust casing external scroll and in enclosure walls

摘要

The nacelle (10) is located between a primary flow duct (11) of a hot flow (5) and a secondary flow duct (12) of a cold flow (6). Downstream is an exhaust casing (16) connected to an enclosure (17) located at the rear of the turbine by several structural arms (18) passing through the primary duct. Ventilation air is exhausted to the exterior by means of cavities (3) in the structural arms and orifices corresponding to the cavities in the external scroll of the exhaust casing and in the walls of the enclosure. The enclosure comprises an orifice (32) allowing the evacuation of ventilation air from the nacelle with the gases ejected from the turbine.