Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability
In this work, the effects of in-cylinder heat transfer on indicated thermal efficiency of a spark ignition engine showing a cylinder-to-cylinder variation are numerically analyzed. A 1D CFD model of engine is developed and integrated with a turbulent combustion sub-model and with a refined thermal s...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-07-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X22003719 |
| _version_ | 1818007749233999872 |
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| author | Luigi Teodosio Cinzia Tornatore Luca Marchitto |
| author_facet | Luigi Teodosio Cinzia Tornatore Luca Marchitto |
| author_sort | Luigi Teodosio |
| collection | DOAJ |
| description | In this work, the effects of in-cylinder heat transfer on indicated thermal efficiency of a spark ignition engine showing a cylinder-to-cylinder variation are numerically analyzed. A 1D CFD model of engine is developed and integrated with a turbulent combustion sub-model and with a refined thermal sub-model for cylinders and exhaust pipes. The model is validated against the engine measurements. Thermal sub-model includes a Finite Element (FE) approach to predict the temperatures of cylinders and of exhaust pipes. The model correctly reproduces the thermodynamic behavior of cylinders at varying the operating condition. Simulations at low load and speed indicate that in-cylinder heat transfer represents a relevant percentage on total fuel energy entering the cylinder. Therefore, heat transfer exerts an important influence on the improvement of engine indicated thermal efficiency when considering the sole combustion phasing optimization of cylinders and the suppression of cylinder-to-cylinder variation. |
| first_indexed | 2024-04-14T05:20:40Z |
| format | Article |
| id | doaj.art-a65c220bae5e43aea6d75909f3515958 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-14T05:20:40Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-a65c220bae5e43aea6d75909f35159582022-12-22T02:10:13ZengElsevierCase Studies in Thermal Engineering2214-157X2022-07-0135102125Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variabilityLuigi Teodosio0Cinzia Tornatore1Luca Marchitto2Corresponding author.; STEMS, Italian National Research Council, Napoli, ItalySTEMS, Italian National Research Council, Napoli, ItalySTEMS, Italian National Research Council, Napoli, ItalyIn this work, the effects of in-cylinder heat transfer on indicated thermal efficiency of a spark ignition engine showing a cylinder-to-cylinder variation are numerically analyzed. A 1D CFD model of engine is developed and integrated with a turbulent combustion sub-model and with a refined thermal sub-model for cylinders and exhaust pipes. The model is validated against the engine measurements. Thermal sub-model includes a Finite Element (FE) approach to predict the temperatures of cylinders and of exhaust pipes. The model correctly reproduces the thermodynamic behavior of cylinders at varying the operating condition. Simulations at low load and speed indicate that in-cylinder heat transfer represents a relevant percentage on total fuel energy entering the cylinder. Therefore, heat transfer exerts an important influence on the improvement of engine indicated thermal efficiency when considering the sole combustion phasing optimization of cylinders and the suppression of cylinder-to-cylinder variation.http://www.sciencedirect.com/science/article/pii/S2214157X22003719SI engineHeat transfer1D modellingEfficiencyCylinder variability |
| spellingShingle | Luigi Teodosio Cinzia Tornatore Luca Marchitto Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability Case Studies in Thermal Engineering SI engine Heat transfer 1D modelling Efficiency Cylinder variability |
| title | Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability |
| title_full | Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability |
| title_fullStr | Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability |
| title_full_unstemmed | Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability |
| title_short | Numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability |
| title_sort | numerical evaluation of heat transfer effects on the improvement of efficiency of a spark ignition engine characterized by cylinder variability |
| topic | SI engine Heat transfer 1D modelling Efficiency Cylinder variability |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X22003719 |
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