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Indexed by:期刊论文

Date of Publication:2011-02-01

Journal:APPLIED MATHEMATICAL MODELLING

Included Journals:Scopus、SCIE、EI

Volume:35

Issue:2

Page Number:930-940

ISSN No.:0307-904X

Key Words:Diesel engine; Quasi-dimensional combustion model; Phase-divided spray mixing model; Performance prediction

Abstract:In order to improve the precision of quasi-dimensional combustion model for predicting diesel engine performance and promote the real time operating performance of the simulation model, a new phase-divided spray mixing model is proposed and the quasi-dimensional combustion model of diesel engine working process is developed. The software MATLAB/Simulink is utilized to build the quasi-dimensional combustion model of diesel engine working process, and the performance for diesel engine is simulated. The simulation results agree with experimental data quite well. The comparisons between them show that the relative error of power and brake specific fuel consumption is less than 2.8% and the relative error of nitric oxide and soot emissions is less than 9.1%. By utilization of this simulation model with personal computer, the average computational time for one diesel engine working process is 36 s, which presents good real time operating performance of the model. At the same time, the influence of parameters in calculation of air entrainment on prediction precision of diesel engine's simulation model is analyzed. (C) 2010 Elsevier Inc. All rights reserved.