Device for attaching a flame-holder arm to an afterburner housing

摘要

A flame-holder device for an afterburner of a turbofan, the turbofan including a first inner annular casing and a second inner annular casing, these defining a passage for a primary flow, and an outer annular casing defining with the first inner annular casing a passage for a secondary flow, including at least one arm-support made of metallic material configured to be fixed to the outer casing by an upper plate and at least one flame-holder arm of a one-piece structure of composite material including two mutually attached walls arranged to define a groove whose profile is approximately a V. The walls support, on their upper part situated in the secondary flow, a fixing mechanism for fixing to the arm-support. The upper parts are approximately planar and are positioned facing each other.

主权项

1. A flame-holder device for an afterburner of a bypass turbojet, the turbojet including a first inner annular housing and a second inner annular housing, defining a passageway for a main flow, and an outer annular housing defining with the first inner annular housing a passageway for a bypass flow, the device comprising:
at least one arm support made of metal and configured to be attached to the outer housing by an upper plate; and at least one flame-holder arm of a one-piece structure made of composite material including two joined-together walls arranged to define a throat having a substantially V-shaped profile, the walls supporting on their top portions situated in the bypass flow an attachment device which attaches the flame-holder arm to the arm support, wherein the top portions are flat and positioned facing one another, wherein the arm support includes two lateral struts of which on an inside each includes a hollow cavity which leads, in a direction of the outer housing, into a top cavity hollowed out of the upper plate, and wherein the flame-holder device further comprises at least one pressure-tapping hole pierced in a bottom portion of each of the struts to feed air to the hollow and the top cavities, an orifice for letting the air out being arranged in the top portion of the device at the outer housing.