Pre-swirler adjustability in gas turbine engine

A gas turbine engine with pre-swirler (400) adjustability is presented. The pre-swirler includes a pre-swirler insert (420) mounted in a component enclosed by a cover (12, 16). The component includes an inner compressor outlet diffuser (222) enclosed by an outer casing (12) or a shaft cap (16) enclosed by the inner compressor outlet diffuser. The pre-swirler may be adjusted by replacing a pre-swirler insert (420). An access port (430) including an access window (431) is disposed on the cover. The inlet port (430) permits access to the pre-swirler insert (420) for replacement through the inlet window (431). The access window (431) includes a manhole or combustor assembly mounting hole on the outer casing, or a cutout on the inner compressor outlet diffuser. The inlet port allows adjustment of the pre-swirler (400) by replacing a pre-swirler insert (431) mounted in the component without lifting a cover (12, 16) enclosing the component (222). 呈现了一种具有预旋流器（400）可调节性的燃气涡轮发动机。预旋流器包括安装在由盖（12、16）围封的部件中的预旋流器插入件（420）。该部件