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 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;
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 from the plurality of reference oxidation rates based on the actual turbine operating conditions;
using the selected reference oxidation rate as the actual oxidation rate; and
calculating an amount of oxidation present in the turbine component using the actual oxidation rate.
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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.
14 Citations
22 Claims
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1. 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 from the plurality of reference oxidation rates based on the actual turbine operating conditions;
using the selected reference oxidation rate as the actual oxidation rate; and
calculating an amount of oxidation present in the turbine component using the actual oxidation rate. - View Dependent Claims (2, 3, 4, 5)
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6. 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 to approximate the extent of oxidation. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of determining the extent of an oxidation reaction of a composition, 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.
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Specification