Sjerić, Momir and Kozarac, Darko and Tatschl, Reinhard (2015) Modelling of Early Flame Kernel Growth Towards A Better Understanding of Cyclic Combustion Variability in SI Engines. = Modelling of Early Flame Kernel Growth Towards A Better Understanding of Cyclic Combustion Variability in SI Engines. Energy conversion and management, 103. pp. 895-909. ISSN 0196-8904. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2015). Točan broj autora: 3.
Full text not available from this repository.Abstract
The analysis of particular effects that influence cyclic combustion variability in spark-ignition engines is presented in this paper. The cycle-simulations are performed over 16 knock-free full load operating conditions of a single cylinder engine fuelled with gasoline. For the modelling of early flame kernel growth a newly developed quasi-dimensional ignition model is applied. The ignition model includes a detailed description of the electric circuit, the electric spark length, the spark plug geometry and the flame kernel growth. The main turbulent combustion is calculated using the extended quasi-dimensional fractal combustion model requiring the correct prediction of in- cylinder turbulence level. The cyclic combustion variability is simulated by a variation of the in-cylinder turbulence level, the flow angle at spark plug and the stratification of air equivalence ratio from cycle-to-cycle. The statistical analysis of the indicated mean effective pressure (IMEP) gives a more detailed quantitative picture of the causes of the cyclic combustion variability in SI engines over the different operating conditions. The variation of in-cylinder turbulence is found to be the dominant factor that affects the cyclic variability (up to 66 %), while the variation in the early flame kernel growth rate is responsible for up to 18 % of the overall cyclic combustion variability in the modelled SI engine at full load conditions.
| Item Type: | Article (["eprint_fieldopt_article_type_article" not defined]) |
|---|---|
| Keywords (Croatian): | engine, spark-ignition, cyclic variability, combustion, turbulence |
| Subjects: | TECHNICAL SCIENCE > Mechanical Engineering |
| Divisions: | 400 Department of IC Engines and Mechanical Handling Equipment > 410 Chair of IC Engines and Motor Vehicles |
| Indexed in Web of Science: | Yes |
| Indexed in Current Contents: | Yes |
| Citations JCR: | 1 (03.03.2017.) |
| Quartiles: | Q1 (2015) |
| Date Deposited: | 15 Apr 2016 11:11 |
| Last Modified: | 03 Mar 2017 15:46 |
| URI: | http://repozitorij.fsb.hr/id/eprint/5689 |
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