Simulation study of a ship's engine behaviour running with a periodically immersed exhaust

This paper presents a simulation study of a marine diesel engine equipped with an exhaust system periodically immersed by sea waves. The engine is simulated with an existing, filling and emptying zero-dimensional thermodynamic model. The exhaust system is described with capacitive and inertial eleme...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part M, Journal of engineering for the maritime environment Journal of engineering for the maritime environment, 2008-11, Vol.222 (4), p.195-205
Main Authors: Tauzia, X, Chessé, P, Maiboom, A
Format: Article
Language:English
Subjects:
Diesel engines
Emissions
Engines
Exhaust emissions
Exhausts
Ship design
Ships
Simulation
Sine waves
Temperature
Thermodynamics
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Summary:This paper presents a simulation study of a marine diesel engine equipped with an exhaust system periodically immersed by sea waves. The engine is simulated with an existing, filling and emptying zero-dimensional thermodynamic model. The exhaust system is described with capacitive and inertial elements, and the modelling can take into account water penetration into the exhaust system. An extensive parametric study is conducted to check the influence of exhaust backpressure on engine performances, efficiency, and reliability. A constant water height is first studied and then sinusoidal waves of various periods are analysed, for several engine loads from idle to full load. Results show that the turbine inlet temperature, air/fuel (A/F) ratio, or scavenging process can become critical in some situations. Simulation can help to design an exhaust system that avoids these situations.
ISSN:1475-0902
2041-3084
DOI:10.1243/14750902JEME117