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Polish Maritime Research

Tytuł artykułu

Numerical model to study the valve overlap period in the Wärtsilä 6L 46 four-stroke marine engine

Autorzy Lamas, M. I.  Rodríguez, C. G.  Rebollido, J. M. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
EN In this paper, a CFD (Computational Fluid Dynamics) analysis was carried out to study the Wärtsilä 6L 46 medium-speed, four-stroke marine engine. For the purpose, the commercial software ANSYS Fluent 6.3 was employed. The aim is to analyze the scavenging of gases, especially during the valve overlap period. Particularly, the pressure, velocity and mass fraction fields were numerically obtained. In order to validate the CFD results, the in-cylinder pressure was successfully compared to experimental measurements for the exhaust, intake and compression strokes of the cylinder operation. This model can be used in future works to improve the performance of these engines because the information provided is very useful to identify regions in which the pressure, velocity or distribution of gases are inadequate. Besides, to compute the quantity of burnt gases which remain inside the cylinder, fresh charge which is expelled through the exhaust valves and study the influence of parameters such as the exhaust and intake pressures, engine speed, cam profile design, etc.
Słowa kluczowe
EN four-stroke engine   computational fluid dynamics (CFD)   marine engine  
Wydawca Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
Czasopismo Polish Maritime Research
Rocznik 2012
Tom nr 1
Strony 31--37
Opis fizyczny Bibliogr. 13 poz., rys., tab.
autor Lamas, M. I.
autor Rodríguez, C. G.
autor Rebollido, J. M.
  • Escola Universitaria Politécnica. Universidade da Coruńa. Avda. 19 de Febreiro s/n - 15405 Ferrol - A Coruńa. SPAIN,
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