LP turbine vane airfoil profile
A single stage low pressure turbine vane includes an airfoil having a profile substantially in accordance with at least an intermediate portion of the Cartesian coordinate values of X, Y and Z set forth in Table 2. The X and Y values are distances, which when smoothly connected by an appropriate continuing curve, define airfoil profile sections at each distance Z. The profile sections at each distance Z are joined smoothly to one another to form a complete airfoil shape.
1. A turbine vane for a gas turbine engine comprising an airfoil having an intermediate portion defined by a nominal profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of Sections 3 to 8 set forth in Table 2, wherein the point of origin of the orthogonally related axes X, Y and Z is located at an intersection of a centerline of the gas turbine engine and a stacking line of the turbine vane, the Z values are radial distances measured along the stacking line, the X and Y are coordinate values defining the profile at each distance Z.
2. The turbine vane as defined in claim 1 forming part of a low pressure turbine stage of the gas turbine engine.
3. The turbine vane as defined in claim 2 , wherein the vane forms part of a single stage low pressure turbine.
4. The turbine vane as defined in claim 1 , wherein the X and Y values are scalable as a function of the same constant or number.
5. The turbine vane as defined in claim 1 , wherein the X and Y coordinate values have a manufacturing tolerance of ±0.003.
6. The turbine vane as defined in claim 5 , wherein the nominal profile defining the intermediate portion is for an uncoated airfoil.
7. The turbine vane as defined in claim 1 , wherein X and Y values define a set of points for each Z value which when connected by smooth continuing arcs define an airfoil profile section, the profile sections at the Z distances being joined smoothly with one another to form an airfoil shape of the intermediate portion.
8. A turbine vane for a gas turbine engine having an intermediate airfoil portion at least partly defined by a nominal profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of Sections 3 to 8 set forth in Table 2, wherein the point of origin of the orthogonally related axes X, Y and Z is located at an intersection of a centerline of the gas turbine engine and a stacking line of the turbine vane, the Z values are radial distances measured along the stacking line, the X and Y are coordinate values defining the profile at each distance Z, and wherein the X and Y values are scalable as a function of the same constant or number.
9. The airfoil as defined in claim 8 forming part of a vane of a low pressure turbine stage of the gas turbine engine.
10. The turbine vane as defined in claim 9 , wherein the vane is part of a single stage low pressure turbine.
11. The turbine vane as defined in claim 8 , wherein the X and Y coordinate values have a manufacturing tolerance ±0.003 inches.
12. The turbine vane as defined in claim 11 , wherein the nominal profile defining the intermediate portion is for an uncoated airfoil.
13. The turbine vane as defined in claim 8 , wherein X and Y values define a set of points for each Z value which when connected by smooth continuing arcs define an airfoil profile section, the profile sections at the Z distances being joined smoothly with one another to form an airfoil shape of the intermediate portion.
14. A turbine stator assembly for a gas turbine engine comprising a plurality of vanes, each vane including an airfoil having an intermediate portion defined by a nominal profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of Sections 3 to 8 set forth in Table 2, wherein the point of origin of the orthogonally related axes X, Y and Z is located at an intersection of a centerline of the gas turbine engine and a stacking line of the turbine vane, the Z values are radial distances measured along the stacking line, the X and Y are coordinate values defining the profile at each distance Z.
15. A low pressure turbine vane comprising at least one airfoil having a surface lying substantially on the points of Table 2, the airfoil extending between platforms defined generally by Table 1, wherein a fillet radius is applied around the airfoil between the airfoil and platforms, and wherein the values of Table 2 are subject to relevant tolerance.