US Patent 10330020 Turbojet with a discharge duct

A unit including an intermediate turbojet casing formed by a hub including a downstream transverse endplate having formed therein at least one first opening putting the inside of the hub into communication with a duct extending downstream from the endplate and opening out at its downstream end via a second opening formed in an outer annular shroud extending downstream from the hub for defining the inside of an annular flow space for a secondary stream, is provided. The upstream end of the duct is fastened to the downstream endplate of the hub by releasable elastic engagement.