Turbine blade tip shroud surface profiles

A turbine blade tip shroud, comprising:

• a pair of opposed, axially extending wings configured to couple to an airfoil at a radially outer end of the airfoil, the airfoil having a suction side and a pressure side opposing the suction side, a leading edge spanning between the pressure side and the suction side, and a trailing edge opposing the leading edge and spanning between the pressure side and the suction side;
• a tip rail extending radially from the pair of opposed, axially extending wings, the tip rail having a downstream side and an upstream side opposing the downstream side and a forward-most and radially outermost origin;
• and
• a leading Z-notch surface having a shape having a nominal profile substantially in accordance with at least part of Cartesian coordinate values of X, Y, Z and thickness values set forth in TABLE III and originating at the forward-most and radially outermost origin, wherein the Cartesian coordinate values are non-dimensional values of from 0% to 100% convertible to distances by multiplying the values by a tip rail axial length, and wherein X and Y values are joined smoothly with one another to form a leading Z-notch surface profile,
• wherein the thickness of the leading Z-notch surface profile at each X and Y coordinate value extends radially inwardly from a corresponding Z value.

A turbine blade tip shroud, comprising:

• a pair of opposed, axially extending wings configured to couple to an airfoil at a radially outer end of the airfoil, the airfoil having a suction side and a pressure side opposing the suction side, a leading edge spanning between the pressure side and the suction side, and a trailing edge opposing the leading edge and spanning between the pressure side and the suction side;
• a tip rail extending radially from the pair of opposed, axially extending wings, the tip rail having a downstream side and an upstream side opposing the downstream side and a forward-most and radially outermost origin;
• and
• a trailing Z-notch surface having a shape having a nominal profile substantially in accordance with at least part of Cartesian coordinate values of X, Y, Z and thickness values set forth in TABLE IV and originating at the forward-most and radially outermost origin, wherein the Cartesian coordinate values are non-dimensional values of from 0% to 100% convertible to distances by multiplying the values by a tip rail axial length, and wherein X and Y values are joined smoothly with one another to form a trailing Z-notch surface profile,
• wherein the thickness of the trailing Z-notch surface profile at each X and Y coordinate value extends radially inwardly from a corresponding Z value.

A turbine blade tip shroud, comprising:

• a pair of opposed, axially extending wings configured to couple to an airfoil at a radially outer end of the airfoil, the airfoil having a suction side and a pressure side opposing the suction side, a leading edge spanning between the pressure side and the suction side, and a trailing edge opposing the leading edge and spanning between the pressure side and the suction side;
• a tip rail extending radially from the pair of opposed, axially extending wings, the tip rail having a downstream side and an upstream side opposing the downstream side, the tip rail having a forward-most and radially outermost origin;
• and
• a radially outer surface of the wing on the downstream side of the tip rail having a shape having a nominal profile substantially in accordance with at least part of Cartesian coordinate values of X, Y, Z set forth in TABLE V and originating at the forward-most and radially outermost origin, wherein the Cartesian coordinate values are non-dimensional values of from 0% to 100% convertible to distances by multiplying the values by a tip rail axial length, and wherein X, Y and Z values are joined smoothly with one another to form a downstream side radial outer surface profile.

A turbine blade tip shroud, comprising:

• a pair of opposed, axially extending wings configured to couple to an airfoil at a radially outer end of the airfoil, the airfoil having a suction side and a pressure side opposing the suction side, a leading edge spanning between the pressure side and the suction side, and a trailing edge opposing the leading edge and spanning between the pressure side and the suction side;
• a tip rail extending radially from the pair of opposed, axially extending wings, the tip rail having a downstream side and an upstream side opposing the downstream side, the tip rail having a rearward-most and radially outermost origin;
• and
• a radially outer surface of the wing on the upstream side of the tip rail having a shape having a nominal profile substantially in accordance with at least part of Cartesian coordinate values of X, Y, Z set forth in TABLE VI and originating at the rearward-most and radially outermost origin, wherein the Cartesian coordinate values are non-dimensional values of from 0% to 100% convertible to distances by multiplying the values by a tip rail axial length, and wherein X, Y and Z values are joined smoothly with one another to form an upstream side radial outer surface profile.