First stage turbine nozzle airfoil
AssigneeGeneral Electric Company
InventorsCurtis John Jacks, Craig Allen Bielek, Robert Walter Coign, Randall Gill
Life of this patent
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Abstract
The first stage nozzles have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth Table 1. The X and Y values are in inches and the Z value is non-dimensional along the nozzle-stacking axis coincident with a turbine radius and convertible to a Z distance in inches from the turbine axis by multiplying the Z value by the height of the airfoil and adding the root radius to the result. The X and Y distances may be scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil section for the nozzle. The nominal airfoil given by the X, Y and Z distances lies within an envelope of ±0.160 inches.
Claims19
A turbine nozzle comprising an airfoil shape in an envelope within ±0.160 inches in a direction normal to any airfoil surface location wherein the airfoil comprises a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein the Z coordinate comprises a nondimensional value along a nozzle stacking line coincident with a radius from a turbine axis of rotation and convertible to a Z distance in inches by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, and wherein X and Y comprise distances in inches defining the airfoil profile at each distance Z, the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.
A turbine nozzle comprising an airfoil shape with an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein Z comprises a nondimensional value along a nozzle stacking axis coincident with a radius from a turbine axis of rotation and convertible to a Z distance in inches from said turbine axis by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, wherein X and Y comprise distances in inches defining the airfoil profile at each distance Z, the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.
A turbine comprising a nozzle arrangement comprising a plurality of nozzles, with each nozzle comprising an airfoil shape in an envelope within ±0.160 inches in a direction normal to any airfoil surface location wherein the airfoil comprises a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein the Z coordinate comprises a nondimensional value along a nozzle stacking axis coincident with a radius from a turbine axis of rotation convertible to a Z distance in inches from said turbine axis by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, and wherein the X and Y values comprise distances in inches defining the airfoil profile at each distance Z, the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.
A turbine comprising a nozzle arrangement comprising a plurality of nozzles, each of said nozzles comprising an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein the Z coordinate comprises a nondimensional value along a nozzle stacking axis coincident with a radius from a turbine axis of rotation convertible to a Z distance in inches from said turbine axis of rotation by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, wherein X and Y comprises distances in inches defining the airfoil profile at each distance Z, and the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.
Dependencies are inferred from the claim text.