Patent ID: 8544255

Claim:
A device for reducing infrared emissions at an outlet of a turboprop mounted to an aircraft, said outlet having, within said turboprop, a tubular duct which extends downwardly from a nozzle of said turboprop and through which hot gases flow off said nozzle, wherein said device has a tubular sleeve which is able to slide into said tubular duct while said hot gases flow therethrough and which can switch: from an inner position, in which said tubular sleeve is entirely accommodated inside said tubular duct, to a projecting position, in which said tubular sleeve projects outwardly from said tubular duct and is able to collect a flow of outside fresh air and to mix said flow of outside fresh air thus collected with said gases flow coming from a turbine, in order to lower the temperature of the latter flow before the latter flow is discharged outside by said tubular sleeve.