Abstract
Exhaust gas temperature measurements in diagnostic examination of naval gas turbine enginesThe first part of the article is limited to the presentation of the results of diagnostic examination of a three-shaft engine with a separate power turbine, operating in steady-load states. The here presented diagnostic analyses and syntheses based on a simplified mathematical model of thermal and flow processes taking place in the combustion chamber, which was used for deriving the equation describing the average steady-state temperature of the exhaust gas flow at the outlet cross-section of the chamber.
Highlights
A basic control parameter of naval turbine engine operation is the temperature of the exhaust gas flow behind the combustion chamber, measured at engine steady-load states, during the start-up process, and during intermediate time intervals between consecutive steady states
When the measured values of the exhaust gas temperature exceeds the set operating tolerance limits, it is a signal of inadmissible disturbances in the energy conversion processes realised in the engine, which threat with engine break-down [2, 4, 8, 11]
High dynamics of the realised thermal and flow processes is the source of heavy thermal and gasodynamic loads acting on the components of its structure
Summary
The article presents a possible method of detecting failures in the flow section and supply system of a naval gas turbine engine based on the exhaust gas temperature measured behind the gas generator. This temperature is a basic diagnostic parameter use for evaluating the technical state of the turbine engine in operation, and is monitored during engine start-ups, accelerations and decelerations of rotor units, and steady-load states
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