Abstract: The paper reports and discusses the results obtained by the application of a theoretical simulation to a sequentially turbocharged marine diesel engine, with the aim to predict the transient variation of some in-cylinder and overall parameters as a consequence of the engine speed and load variation. The simulation model is applied to the behaviour prediction of the Wärtsilä 18V 26X engine, a highly rated, recently developed, sequentially turbocharged marine diesel engine, when the load is varying according to the propeller load. The analysis is focused in particular to the second turbocharger switching-in/out operations, in order to evaluate the thermal and mechanical stresses induced to cylinder, piston and cinematic member during these phases. A two-zone actual cycle calculation scheme is used for the in-cylinder phenomena description. The model used to simulate the engine-load dynamics, already presented and discussed in previous papers, has been modified and improved in the present application by introducing suitable engine governor and fuel pump sub-models, expressly developed and discussed in the paper.

Dynamic Behaviour Analysis of a Sequentially Turbocharged Marine Diesel Engine

BENVENUTO, GIOVANNI BATTISTA;CAMPORA, UGO
2002-01-01

Abstract

Abstract: The paper reports and discusses the results obtained by the application of a theoretical simulation to a sequentially turbocharged marine diesel engine, with the aim to predict the transient variation of some in-cylinder and overall parameters as a consequence of the engine speed and load variation. The simulation model is applied to the behaviour prediction of the Wärtsilä 18V 26X engine, a highly rated, recently developed, sequentially turbocharged marine diesel engine, when the load is varying according to the propeller load. The analysis is focused in particular to the second turbocharger switching-in/out operations, in order to evaluate the thermal and mechanical stresses induced to cylinder, piston and cinematic member during these phases. A two-zone actual cycle calculation scheme is used for the in-cylinder phenomena description. The model used to simulate the engine-load dynamics, already presented and discussed in previous papers, has been modified and improved in the present application by introducing suitable engine governor and fuel pump sub-models, expressly developed and discussed in the paper.
2002
9785900703749
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/229236
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