NDLI: Determination of Steady State Gas Turbine Operation

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Craig, R. Davison
Copyright Year	2012
Abstract	Repeatable measurement of engine performance requires the system to be near steady state. A technique is presented to assess how close engine operation is to steady state. It estimates the rate of change of the assessed parameter across the sample time and provides an associated confidence interval. This allows a minimum amount of test time to characterize performance and provides consistent criteria to assess steady state. The technique can either be used online to determine when to take a steady state point or to find the optimal sample from a given data set. To make the technique feasible during testing a recursive method is developed to minimize the computational time. The technique is demonstrated on known functions with random noise to benchmark its capabilities. This is followed by a demonstration on test data from a small turbo jet engine operated in an altitude facility, a turboprop on an outdoor test stand and an after-burning turbofan in an indoor test cell.
Sponsorship	International Gas Turbine Institute
Starting Page	107
Ending Page	118
Page Count	12
File Format	PDF
ISBN	9780791844670
DOI	10.1115/GT2012-68632
Volume Number	Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation
Conference Proceedings	ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2012-06-11
Publisher Place	Copenhagen, Denmark
Access Restriction	Subscribed
Subject Keyword	Random noise Gas turbines Turbofans Combustion Turbochargers Steady state Engines Jet engines Testing
Content Type	Text
Resource Type	Article

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