Filip Jurić (Author), Zvonimir Petranović (Author), Milan Vujanović (Author), Tomaž Katrašnik (Author), Rok Vihar (Author), Xuebin Wang (Author), Neven Duić (Author)

Abstract

To explore the influence of fuel injection strategy on the combustion process, the Computational Fluid Dynamics (CFD) simulations were performed, and simulation results were validated against the experimental data measured at different rail pressures and injection timings. The experiments were conducted on a diesel engine equipped with an advanced injection system that allows full control over the injection parameters. To model the combustion process of EN590 diesel fuel, two different approaches were used: the General Gas Phase Reactions (GGPR) approach and the 3-zones Extended Coherent Flame Model (ECFM-3Z+). The calculated results, such as mean pressure and rate of heat release, were validated against experimental data in operating points with different injection parameters in order to prove the validity of spray and combustion sub-models. At the higher injected pressure, GGPR model showed better prediction capability in the premixed phase of combustion process, compared to the ECFM-3Z+ model. Nevertheless, in the rate-controlled phase of combustion process, ECFM-3Z+ model shows stronger diffusion of temperature field, due to the more detailed consideration of combustion diffusion phenomena in the ECFM-3Z+ governing equations. Furthermore, the results show that the rail pressure has a lower impact on the combustion process for injection timing after the Top Dead Centre (TDC). Both, single and multi-injection cases are found to be in a good agreement with the experimental data, while the GGPR approach was found to be suitable only for combustion delay determination and ECFM-3Z+ also for the entire combustion process.

Keywords

diesel engines;combustion modelling;fuel injection;computational fluid dynamics;general gas phase reactions;coherent flame model;sprays;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 621.43(045)
COBISS: 16595739 Link will open in a new window
ISSN: 0196-8904
Views: 969
Downloads: 376
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: motorji s kompresijskim vžigom;modeli zgorevanja;vbrizg goriva;računalniška dinamika tekočin;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2021-02-26
Pages: str. 730-739
Issue: ǂVol. ǂ185
Chronology: Apr. 2019
DOI: 10.1016/j.enconman.2019.02.039
ID: 11125965