A FLAME HOLDER DEVICE IN AFTERBURNER TUBES OF TURBOJET ENGINES HAVING AN AIR FAN ROTOR OF BY-PASS TYPE

摘要

A flame holder device in afterburner tubes of turbojet engines, which have an air fan rotor of by-pass type, comprises at least one concentric annular flame holder element (34a) with V-like cross-sectional shape, the mouth of which is oriented in downstream direction, and supporting circumferentially spaced and radially extending arms (40), also having V-like cross-sectional shape. In order to avoid detrimental stresses and local overheating of the material of the device, which occur in conventional structures, the invention suggests that the radially outermost end portions (40a) of the arms (40) are located in the air duct (12) from the fan and have an inlet opening (40c) facing the air flow in said duct (12) for guiding of air therefrom into said arms (40), while the radially innermost portions (40b) of the arms are located adjacent to or within the core of the flow from the turbojet engine (10) for letting out said air thereinto.