FIELD: transport.
SUBSTANCE: turbine airfoil comprises aerodynamic body, heat protection system existing in coated surface zone and uncoated surface zone with no heat protective coat. Uncoated surface zone extends on airfoil outer surface lower pressure side from trailing edge to leading edge up to interface between surface coated zone and surface uncoated zone. Said interface is located at lower pressure side between leading edge and trailing edge while airfoil body comprises step in outer surface extending along said interface. Another invention of the set relates to turbine guide or working vane with abode described turbine airfoil.
EFFECT: better aerodynamics, longer life.
24 cl, 3 dwg
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