EXHAUST DIFFUSER HUB, EXHAUST DIFFUSER AND GAS TURBINE

An exhaust diffuser hub (210) disposed at a longitudinal center of an exhaust diffuser (106) is provided. The exhaust diffuser hub (210) includes a hub extension (400) extending from a downstream end thereof in a longitudinal direction of the exhaust diffuser (106). A transverse cross-sectional area of the hub extension (400) is smaller than a transverse cross-sectional area of the hub (210).