Original scientific paper

https://doi.org/10.17559/TV-20151116115801

Quasi-dimensional diesel engine model with direct calculation of cylinder temperature and pressure

Vedran Mrzljak orcid.org/0000-0003-0323-2600 ; Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
Vladimir Medica ; Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
Ozren Bukovac orcid.org/0000-0002-4388-0234 ; Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia

Abstract

This paper describes the quasi-dimensional numerical model, implemented in previously developed 0D model. The presented model uses direct solution of equations for cylinder pressure and zone temperatures, without numerical iterations which are customary for these models. In the model there is shown a process of averaging from a set of small fuel spray packages (volumes) into big ones, which is a necessary precondition for the numerical stability. The model uses about fifty submodels. Simulations were performed in eight operating points, on four most sensitive engine cylinder operating parameters. Direct solution of temperature and pressure changes, in conjunction with the fuel spray packages averaging, represents a contribution to quasi-dimensional diesel engine process modelling.

Keywords

combustion; diesel engine; emissions; fuel spray; quasi-dimensional (phenomenological) model

Hrčak ID:

183023

URI

https://hrcak.srce.hr/183023

Publication date:

15.6.2017.

Article data in other languages: croatian

Visits: 1.615 *