Method of estimating oxidation progression in coated turbine components
First Claim
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1. A method for determining the extent of an oxidation reaction of a coated metal turbine component within a turbine, comprising:
- providing an aluminum comprising coating on a metal substrate;
providing a family of reference oxidation rate curves for the aluminum comprising coating as a function of time and temperature;
calculating an actual oxidation rate for the aluminum comprising coating during operation of the turbine as a function of time or temperature;
creating a path dependent oxidation rate curve based upon the calculated actual oxidation reaction rate;
comparing the path dependent oxidation rate curve with the family of oxidation reaction rate curves;
selecting from the family of reference oxidation reaction rate curves, a curve that generally corresponds with the path dependent oxidation rate curve; and
using the selected curve and a summation of incremental amounts of the calculated actual oxidation reaction rate to approximate and makes available to a user the extent of oxidation of the coated turbine component.
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Abstract
The claimed invention relates to a method for determining the extent of an oxidation reaction of a coated metallic turbine component within a turbine, comprising determining a plurality of reference oxidation rates for a plurality of locations on the turbine component for a plurality of different turbine operating conditions. The invention also relates to selecting an appropriate oxidation rate from a family of reference oxidation rate data and estimating the oxidation of the coated turbine blade or vane.
17 Citations
24 Claims
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1. A method for determining the extent of an oxidation reaction of a coated metal turbine component within a turbine, comprising:
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providing an aluminum comprising coating on a metal substrate; providing a family of reference oxidation rate curves for the aluminum comprising coating as a function of time and temperature; calculating an actual oxidation rate for the aluminum comprising coating during operation of the turbine as a function of time or temperature; creating a path dependent oxidation rate curve based upon the calculated actual oxidation reaction rate; comparing the path dependent oxidation rate curve with the family of oxidation reaction rate curves; selecting from the family of reference oxidation reaction rate curves, a curve that generally corresponds with the path dependent oxidation rate curve; and using the selected curve and a summation of incremental amounts of the calculated actual oxidation reaction rate to approximate and makes available to a user the extent of oxidation of the coated turbine component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for determining the extent of an oxidation reaction of a coated metallic turbine component within a turbine, comprising:
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determining a plurality of reference oxidation rates for a plurality of locations on the turbine component for a plurality of different turbine operating conditions; obtaining a set of actual turbine operating conditions based on time or temperature; obtaining a plurality of turbine component operating temperatures from the set of actual turbine operating conditions; selecting an appropriate reference oxidation rate curve from the plurality of reference oxidation rate curves based on the actual turbine operating conditions; using the selected reference oxidation rate curve as the actual oxidation rate curve; calculating an amount of oxidation present in the turbine component using the actual oxidation rate curve; and making available to a user the remaining life of the component based on calculated amount of oxidation, wherein the predicted amount of oxidation present is determined from the summation of an incremental calculated amount of oxidation from the set of actual operating conditions, and wherein the oxidation rate curve is a path dependent oxidation rate curve. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A method of determining the extent of an oxidation reaction of a component, comprising:
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determining a plurality of oxidation rates; having or being provided one actual rate; selecting from a plurality of oxidation rate curves a curve that most closely matches to a curve representative of actual operating conditions; and using the curve to calculate the extent of oxidation of the component by incrementally summing the plurality of oxidation rates and wherein the oxidation rate curve is a path dependent oxidation rate curve; and
making available to a user the calculated extend of oxidation of the component. - View Dependent Claims (24)
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Specification