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Method and system for turbomachinery surge detection

United States Patent

6,823,254
November 23, 2004
View the Complete Patent at the US Patent & Trademark Office
A method and system for surge detection within a gas turbine engine, comprises: measuring the compressor discharge pressure (CDP) of the gas turbine over a period of time; determining a time derivative (CDP.sub.D ) of the measured (CDP) correcting the CDP.sub.D for altitude, (CDP.sub.DCOR); estimating a short-term average of CDP.sub.DCOR.sup.2 ; estimating a short-term average of CDP.sub.DCOR ; and determining a short-term variance of corrected CDP rate of change (CDP.sub.roc) based upon the short-term average of CDP.sub.DCOR and the short-term average of CDP.sub.DCOR.sup.2. The method and system then compares the short-term variance of corrected CDP rate of change with a pre-determined threshold (CDP.sub.proc) and signals an output when CDP.sub.roc >CDP.sub.proc. The method and system provides a signal of a surge within the gas turbine engine when CDP.sub.roc remains>CDP.sub.proc for pre-determined period of time.
Faymon; David K. (Phoenix, AZ), Mays; Darrell C. (Lakewood, CA), Xiong; Yufei (Phoenix, AZ)
Honeywell International, Inc. (Morristown, NJ)
10/ 402,210
20040193355
March 28, 2003
GOVERNMENT RIGHTS This invention was made with Government support under Contract No. DE-FC02-97EE50470 awarded by the Department of Energy. The U.S. Government has certain rights in this invention.