DYNAMIC TUNING OF A GAS TURBINE ENGINE TO DETECT AND PREVENT LEAN BLOWOUT

摘要

A method for tuning a combustor of a gas turbine engine based on one or more monitored operating conditions is provided. One or more operating conditions of the gas turbine engine are monitored. The monitored operating conditions may include, for example, a low frequency tone, a high frequency tone, and a ratio of the low frequency tone to the high frequency tone. It is determined whether the ratio of the low frequency tone to the high frequency tone is within a first predefined normal range. If the ratio of the low frequency tone to the high frequency tone is within the first predefined normal range, a determination is made not to tune the gas turbine engine. But, if the ratio of the low frequency tone to the high frequency tone is not within the first predefined normal range, a determination is made to tune the gas turbine engine.

主权项

1. One or more computer-readable media that, when invoked by computer-executable instructions, perform a method for tuning a combustor of a gas turbine engine based on one or more monitored operating conditions, the method comprising:
monitoring the one or more operating conditions of the gas turbine engine, wherein the one or more operating conditions include, at least, a low frequency tone, a high frequency tone, and a ratio of the low frequency tone to the high frequency tone; determining whether the ratio of the low frequency tone to the high frequency tone is within a first predefined normal range; if the ratio of the low frequency tone to the high frequency tone is within the first predefined normal range, determining not to tune the combustor of the gas turbine engine; and if the ratio of the low frequency tone to the high frequency tone is not within the first predefined normal range, tuning the combustor of the gas turbine engine in order to avoid a lean blowout.