GAS TURBINE ENGINE EXHAUST MIXER

摘要

An exhaust mixer for a gas turbine engine includes an annular wall having upstream end adapted to be fastened to an engine case and a downstream end forming a plurality of inner and outer mixer lobes. A support member interconnects at least a number of the inner lobes, and includes a circumferentially extending stiffener ring located radially inwardly from the inner lobes and a series of circumferentially spaced apart mixer struts radially extending from the inner lobes to the stiffener ring. The mixer struts have a radial length at least equal to a width of a main gas path defined between the inner lobes and the exhaust cone such that the mixer struts extend entirely through the main gas path. The stiffener ring being fixed solely to the mixer struts such as to float with respect to the exhaust cone and permit relative movement therebetween.

主权项

1. A gas turbine engine having an engine casing enclosing a compressor section, a combustor and a turbine section defining a main gas path serially extending therethrough, and comprising:
an exhaust cone disposed downstream of the turbine section; and an exhaust mixer connected solely to an aft end of the engine casing such as to be cantilevered therefrom, the exhaust mixer at least partially surrounding the exhaust cone such as to define a portion of the main gas path between an outer surface of the exhaust cone and an annular wall defining a plurality of circumferentially distributed alternating inner and outer lobes of the exhaust mixer, the exhaust mixer including a support member connected to at least a number of the lobes, the support member including a circumferentially extending stiffener ring located radially inward from the lobes and a series of circumferentially spaced apart mixer struts which radially extend through the main gas path between the lobes and the stiffener ring, the mixer struts extending though at least one opening formed in the outer surface of the exhaust cone such that the stiffener ring is located radially inward of the outer surface of the exhaust cone, the stiffener ring being connected only to the support struts such as to be free to move relative to the exhaust cone.