Patent ID: 7997083
Filing Date: 2011-08-16
Classification: F01D,F02C,F05D

Abstract:
1. A method for detecting a lean blowout in a combustion can of a gas turbine engine, the method comprising: detecting a shift in generated power output that does not result from a changing fuel demand; determining that the shift in generated power output results from a lean blowout in a combustor; transmitting a signal to a turbine controller to initiate action to increase margin to lean blowout in all combustors; and implementing a response increasing margin to lean blowout for all combustors; wherein the step of detecting a shift in generated power output that does not result from a changing fuel demand comprising calculating Fuel Normalized Power (FNP) according to: where Power is represented in Driven Megawatts at the output of the generator; Fuelref represents Total Fuel Reference demand supplied to the machine; and Fuelref