Izvorni znanstveni članak
THE INFLUENCE OF FIRING ORDER ON THE PERFORMANCE OF A HIGH SPEED MARINE DIESEL ENGINE
O.K. Sag
; Maritime Faculty Turkey
H. Yildiz
; Maritime Faculty Turkey
Sažetak
The paper describes a parametric study of the influence of firing order on the performance of a high speed marine diesel engine. A 16 cylinder, 4 valve per cylinder, direct injection, supercharged high speed marine diesel engine was considered for the study. Having inspected the firing order and the phase angles of the cylinders for the base engine case, theoretically possible firing orders were determined as parameters. The computer simulation program employed in the study utilises the Method of Characteristics for the unsteady gas flow in the exhaust and intake manifolds of the engine. In-cylinder calculations are coupled to the unsteady gas flow calculations and they include the gas exchange process and a combustion simulation routine by a heat release scheme. The turbocharger simulation is carried out by a subroutine and it appears as a boundary to the unsteady gas flow calculations. The results were
presented in the form of time-resolved graphs for the in-cylinder and intake pipe pressures for each parameter change. The calculated values of specific fuel consumption and power produced per cylinder for the test cases were compared.
Ključne riječi
Hrčak ID:
209580
URI
Datum izdavanja:
26.6.1997.
Posjeta: 400 *