Abstract
The aim of the performed research was to develop of a diagnostic method of the flow section of a marine turbine combustion engine based on the level of delamination of its energy characteristics. The here adopted diagnostic model provides for a formulation of the evaluation of the technical conditions based on the measurements of the parameters of the thermodynamic medium in the characteristic control cross-sections of the flow section of the engine during a steady engine operation at nominal load. Based on the energy balancing of the individual impeller sets calculations were performed of their parameters in the form of a distribution of the stream of enthalpy along the flow section. This constituted the basis for the diagnostic conclusions on the overall technical condition of the engine at the same time enabling the identification of the spots of greatest energy losses.
Highlights
By the term flow section of the marine turbine engine we understand the system of its air and exhaust flow channels limited on one side by the deduster gills and the exhaust gas diffuser channel on the other – Fig. 1
The flow section of the engine is characterized by a throughput depending on its dimensions, flow velocity of the working medium, technical conditions of the intervane channels and the connecting channels, the temperature of the flowing working medium etc
In the process of marine engine operation a regular evaluation of the technical condition is carried out following the analysis of the trends in the changes of the energy characteristics of its flow section – Fig. 4 [7, 8]
Summary
By the term flow section of the marine turbine engine we understand the system of its air and exhaust flow channels limited on one side by the deduster gills and the exhaust gas diffuser channel (water cooled) on the other – Fig. 1. The flow section of the engine is characterized by a throughput depending on its dimensions, flow velocity of the working medium, technical conditions of the intervane channels and the connecting channels, the temperature of the flowing working medium etc. This can be described graphically in the form of grid characteristics as a relation of the compression and the mass flow of the working medium as shown in. W procesie użytkowania charakterystyka oporowa części przepływowej silnika turbinowego zmienia się w sposób ciągły, w zależności od wpływu wielu czynników eksploatacyjnych: – zanieczyszczenia lub zużycia powierzchni kanałów przepływowych, COMBUSTION ENGINES, No 3/2012 (150). – actuation of the devices controlling the wastegate system in the flow section
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