Diffuser for gas turbine engine

摘要

In a gas turbine engine having an annular combustor and an axial flow compressor discharging compressed air through a discharge annulus upstream of said combustor, the diffuser being supported on the engine independently of the combustor between the discharge annulus and a dome on the combustor and including inner and outer walls operative to direct first and second portions of compressor discharge to radially inner and outer air plenums at the combustor and a remaining third portion of compressor discharge flow to a combustor dome feed chamber ahead of the dome, an improvement in the form of radially oriented pins on the diffuser and guides on the combustor dome slidably received on the pins, the pins and guides cooperating in maintaining a predetermined positional relationship between the diffuser and the combustor during relative thermal growth of the latter whereby at normal operating temperature the diffuser outer wall seals against the combustor while a flow balancing slot is developed between the diffuser inner wall and the combustor.