Numerical model to study the valve overlap period in the Wärtsilä 6L 46 four-stroke marine engine 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.
Numerical model to study the valve overlap period in the Wärtsilä 6L 46 four-stroke marine engine
Polish Maritime Research ; 19 , 1
2012
Aufsatz (Zeitschrift)
Unbekannt
Features - MARINE PROPULSION - Wärtsilä NSD's New RTA60C Two-Stroke Engine
Online Contents | 1999
Latest developments in Wartsila 4-stroke engine portfolio
British Library Conference Proceedings | 2007
|Wärtsilä 64 the biggest and the most powerful four-stroke diesel engine
Tema Archiv | 2002
|Wärtsilä NSD-Wartsila-Cummins: High-speed diesel engine Wärtsilä 170
Online Contents | 1997