| 摘要 |
PURPOSE: A nozzle stator vane and a nozzle aerofoil are provided to minimize stress generated by a material temperature mismatching between a nozzle or an external wall of an aerofoil of a stator vane and a rib for supporting. CONSTITUTION: The rib(112) is coupled with both side walls so as to impart mechanical support required between a recessed side wall and a projecting side wall of the aerofoil(110) and is not fixed in a radial direction of a nozzle assembly, that is, a longitudinal direction of the aerofoil(110). By fitting the rib(112) on aerofoil metal so as to provide play in the longitudinal direction of the aerofoil(110), radial direction thermal stress in a coupling area of the aerofoil(110) and the rib(112) generated by a temperature difference is reduced and a proper mechanical support of a nozzle side wall is maintained.
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