Method for protecting a gas turbine engine against high dynamical process values and gas turbine engine for conducting the method
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United States of America Patent
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Jun 30, 2015
Grant Date -
Nov 8, 2012
app pub date -
May 3, 2012
filing date -
May 5, 2011
priority date (Note) -
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Abstract
A method can protect a gas turbine engine (10), which includes a compressor (11), a combustor (13), and a turbine (12), against high dynamical process values, especially in combustor/flame pulsations. Effective protection against high dynamical process values, especially in combustor/flame pulsations, can be achieved by:
- a) measuring the pulsations of the combustor (13) with a suitable sensor (18),b) dividing the frequency spectrum of the measured pulsation signal up into pre-defined band pass sections,c) computing the rms (root mean square) of the signal for each band,d) weighting the computed frequency/frequency band rms with predetermined weighting factors,e) cumulating the weighted frequency/frequency band rms values to get a Pulsation Limit Criterion (PLC) value,f) comparing the PLC value with at least one reference value (23), andg) operating the gas turbine engine (10) according to the result of the comparison.
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