Patent ID: 7908868

Claim:
An afterburner for a bypass turbojet engine, comprising: a dividing wall which separates a main air stream from bypass air, the wall including an upstream cylindrical portion and a downstream conical portion, the downstream conical portion being flared outward in a downstream direction; an attachment unit which attaches the upstream cylindrical portion to an external casing; and flame holder arms which extend radially with respect to a longitudinal axis of the afterburner, the flame holder arms pass through orifices or notches provided on the downstream conical portion, wherein each flame holder arm includes a flange which extends inside the downstream conical portion so as to present a surface for supporting an edge of a corresponding orifice or notch in the downstream conical portion, and a cylindrical rim substantially coaxial with the arm which is provided on the flange and extends radially outward in the orifice or the notch in the downstream conical portion and along the edge of the orifice or of the notch, and wherein small bridges attached to a downstream end of the downstream conical portion abut against a cylindrical sleeve which provides thermal protection to an afterburner jetpipe.