Features of Mathematical Modeling in Problems of Determining the Engine Power by the Parameters of the Exhaust Gas Turbocharger 2019-01-1497
The features of modeling the working process of a turbocharged marine engine in order to reveal the relationship between the engine power and the operation modes of a gas turbocharger are discussed in the article. Based on the results of modeling, a model was obtained for the dependence of the power of the internal combustion engine on the parameters of the exhaust gas turbocharger operation. As a basic parameter of the gas turbocharger operation, the rotor speed was chosen. The scavenging air temperature is selected as an additional parameter. The article shows the results of experimental studies to determine the performance of a gas turbocharger at various modes of operation of a marine internal combustion engine. The article describes the structure of a diagnostic system that allows recording the operating modes of a gas turbocharger in a non-contact method. The use of experimental data in the verification of simulation results has made it possible to reduce the error in determining the power of an internal combustion engine by 5-10%. The described method for estimating the power of a marine internal combustion engine based on the gas turbocharger rotor speed and scavenging air temperature without using expensive piezoelectric type pressure sensors is an alternative method for estimating engine power.
Odessa National Maritime University
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