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Title: Analytical investigation of the effect of thermodynamic and geometric parameters on the performance of a direct injection turbocharged diesel engine

Authors: Brahim Menacer; Mostefa Bouchetara

Addresses: Aeronautics and Systems Propelling Laboratory, Department of Mechanical Engineering, University of Sciences and the Technology of Oran, BP 1505 El-MNAOUER, USTO 31000 ORAN (Algeria), Oran 31000, Algeria ' Aeronautics and Systems Propelling Laboratory, Department of Mechanical Engineering, University of Sciences and the Technology of Oran, BP 1505 El-MNAOUER, USTO 31000 ORAN (Algeria), Oran 31000, Algeria

Abstract: The thermodynamic performance of a diesel engine with heat transfer and friction term losses is analysed. This study deals with the numerical simulation and performance prediction of a turbocharged diesel engine with six-cylinder direct injection. To predict the engine performances, we developed a computer program for simulating the operation of a turbocharged diesel engine, and used the commercial GT-Power software to validate the simulation results. The range of variation of the rotational speed of the diesel engine chosen extends from 800 rpm to 2100 rpm. In this paper, we studied the influence of several engine parameters on the brake power and effective efficiency. Moreover, it puts in evidence the existence of two optimal points in the engine, one relative to maximum power and another to maximum efficiency; it was found that if the injection time is advanced, then the maximum levels of pressure and temperature in the cylinder are high.

Keywords: single-zone models; ignition compression engines; heat transfer; friction; turbocharged diesel engines; GT-Power; performance optimisation; thermodynamics; geometric parameters; direct injection; numerical simulation; engine performance; vehicle design; rotational speed; brake power; brake efficiency; vehicle braking; cylinder pressure; cylinder temperature.

DOI: 10.1504/IJVD.2017.082583

International Journal of Vehicle Design, 2017 Vol.73 No.1/2/3, pp.96 - 115

Available online: 22 Feb 2017 *

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