Original scientific paper

NUMERICAL ANALYSIS OF SEVERAL PORT CONFIGURATIONS IN THE FAIRBANKS-MORSE 38D8-1/8 OPPOSED PISTON MARINE ENGINE

M. I. Lamas ; University of A Coruña, Escuela Politécnica Superior. C/Mendizábal s/n. 15403 Ferrol. A Coruña. Spain
C. G. Rodríguez ; University of A Coruña, Escuela Politécnica Superior. C/Mendizábal s/n. 15403 Ferrol. A Coruña. Spain
J. D. Rodríguez ; University of A Coruña, Escuela Politécnica Superior. C/Mendizábal s/n. 15403 Ferrol. A Coruña. Spain
J. Telmo ; University of Santiago de Compostela

Abstract

The aim of the present paper is to analyze several port configurations in the Fairbanks-Morse 38D8-1/8 marine diesel engine. The motivation comes from the high number of intake and exhaust ports which characterizes this engine. The scavenging and trapping efficiency were studied by modifying several parameters related to the ports, such as the inclination, shape, pressure and number. To this end, a numerical model based on the commercial software ANSYS Fluent was employed. Numerical results were validated using experimental measurements performed on a Fairbanks-Morse 38D8-1/8 engine installed on a submarine. The results confirmed that the influence of the port shape is practically negligible; nevertheless, an adequate combination of the inclination, pressure and number of ports can modify the scavenging and trapping efficiency noticeably.

Keywords

diesel engine; scavenging; CFD (Computational Fluid Dynamics)

Hrčak ID:

136838

URI

https://hrcak.srce.hr/136838

Publication date:

31.3.2015.

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