Method for detecting burner failure
AssigneeROLLS-ROYCE plc
InventorMark J E Bellis
Life of this patent
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Abstract
A method for detecting a burner failure in a gas turbine engine that has a combustor and a turbine disposed downstream of the combustor. The combustor has a plurality of burners arranged annularly. The method includes providing a plurality of temperature sensors arranged annularly at an outlet of the turbine; obtaining a plurality of temperature signals from the plurality of temperature sensors; determining a plurality of validated temperature signals from the plurality of temperature signals; determining a temperature focus at least based on the plurality of validated temperature signals; improving the temperature focus such that the temperature focus is within a tolerance range; and performing at least one hazard protection action at least when the temperature focus crosses a predetermined threshold.
Claims20
A method for detecting a burner failure in a gas turbine engine having a combustor and a turbine disposed downstream of the combustor, the combustor having a plurality of burners arranged annularly, the method comprising the steps of:
- A) providing a plurality of temperature sensors arranged annularly at an outlet of the turbine, the plurality of temperature sensors having respective temperature ranges;
- B) obtaining a plurality of temperature signals from the plurality of temperature sensors;
- C) determining a plurality of validated temperature signals from the plurality of temperature signals, wherein the plurality of validated temperature signals is within the respective temperature ranges of the respective temperature sensors;
- D) determining a temperature focus at least based on the plurality of validated temperature signals;
- E) improving the temperature focus such that the temperature focus is within a tolerance range;
- and
- F) performing at least one hazard protection action at least when the temperature focus crosses a predetermined threshold;
- wherein step C) comprises the sub-steps of:
- C1) eliminating one or more temperature signals from the plurality of temperature signals to determine the plurality of validated temperature signals, such that the plurality of validated temperature signals is within respective temperature ranges of the respective temperature sensors;
- C2) determining a location of each of the plurality of respective sensors generating the plurality of validated temperature signals;
- and
- C3) selecting one validated temperature signal from each location from which two or more of the plurality of validated temperature signals are received, wherein the selection is based on at least one of a channel based selection, a temperature value based selection, a mean based selection, and a model based selection.
A method for detecting a burner failure in a gas turbine engine having a combustor and a turbine disposed downstream of the combustor, the combustor having a plurality of burners arranged annularly, the method comprising the steps of:
- A) providing a plurality of temperature sensors arranged annularly at an outlet of the turbine, the plurality of temperature sensors having respective temperature ranges;
- B) obtaining a plurality of temperature signals from the plurality of temperature sensors;
- C) determining a plurality of validated temperature signals from the plurality of temperature signals, wherein the plurality of validated temperature signals is within the respective temperature ranges of the respective temperature sensors;
- D) determining a temperature focus at least based on the plurality of validated temperature signals;
- E) improving the temperature focus such that the temperature focus is within a tolerance range;
- and
- F) performing at least one hazard protection action at least when the temperature focus crosses a predetermined threshold;
- wherein step D) comprises the sub-steps of:
- D1) determining a whole mean of the plurality of validated temperature signals;
- D2) determining a subset of the plurality of validated temperature signals by eliminating one or more of the plurality of validated temperature signals having corresponding temperature values less than a low threshold from the whole mean;
- D3) determining a focused mean of the subset;
- and
- D4) determining the temperature focus as a difference between the focused mean and the whole mean.
A method for detecting a burner failure in a gas turbine engine having a combustor and a turbine disposed downstream of the combustor, the combustor having a plurality of burners arranged annularly, the method comprising the steps of:
- A) providing a plurality of temperature sensors arranged annularly at an outlet of the turbine, the plurality of temperature sensors having respective temperature ranges;
- B) obtaining a plurality of temperature signals from the plurality of temperature sensors;
- C) determining a plurality of validated temperature signals from the plurality of temperature signals, wherein the plurality of validated temperature signals is within the respective temperature ranges of the respective temperature sensors;
- D) determining a temperature focus at least based on the plurality of validated temperature signals;
- E) improving the temperature focus such that the temperature focus is within a tolerance range;
- and
- F) performing at least one hazard protection action at least when the temperature focus crosses a predetermined threshold;
- wherein step D) comprises the sub-steps of:
- D1) determining a whole mean of the plurality of validated temperature signals;
- D2) comparing each of the plurality of validated temperature signals to a standard distribution;
- D3) determining a subset of the plurality of validated temperature signals by eliminating one or more of the plurality of validated temperature signals having corresponding temperature values below a standard deviation threshold from the whole mean;
- D4) eliminating one or more of the plurality of validated temperature signals having corresponding temperature values above the standard deviation threshold from the whole mean from the subset;
- D5) determining a focused mean of the subset;
- and
- D6) determining the temperature focus as a difference between the focused mean and the whole mean.
Dependencies are inferred from the claim text.