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Method for Making Measurements of the Post-Combustion Residence Time in a Gas Turbine EngineA method of measuring a residence time in a gas-turbine engine is disclosed that includes measuring a combustor pressure signal at a combustor entrance and a turbine exit pressure signal at a turbine exit. The method further includes computing a cross-spectrum function between the combustor pressure signal and the turbine exit pressure signal, calculating a slope of the cross-spectrum function, shifting the turbine exit pressure signal an amount corresponding to a time delay between the measurement of the combustor pressure signal and the turbine exit pressure signal, and recalculating the slope of the cross-spectrum function until the slope reaches zero.
Document ID
20170008511
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Miles, Jeffrey H.
Date Acquired
September 6, 2017
Publication Date
August 15, 2017
Subject Category
Mechanical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-9,733,141
Patent Application
US-Patent-Appl-SN-14/694,235

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