Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical Engines
Nowadays reducing green-house gas emissions and pushing the fossil fuel savings in the field of light-duty vehicles is compulsory to slow down climate change. To this aim, the use of new combustion modes and dilution strategies to increase the stability of operations rich in diluent is an effective...
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MDPI AG
2021-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/24/8566 |
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| author | Edoardo De Renzis Valerio Mariani Gian Marco Bianchi Giulio Cazzoli Stefania Falfari Christian Antetomaso Adrian Irimescu |
| author_facet | Edoardo De Renzis Valerio Mariani Gian Marco Bianchi Giulio Cazzoli Stefania Falfari Christian Antetomaso Adrian Irimescu |
| author_sort | Edoardo De Renzis |
| collection | DOAJ |
| description | Nowadays reducing green-house gas emissions and pushing the fossil fuel savings in the field of light-duty vehicles is compulsory to slow down climate change. To this aim, the use of new combustion modes and dilution strategies to increase the stability of operations rich in diluent is an effective technique to reduce combustion temperatures and heat losses in throttled operations. Since the combustion behavior in those solutions highly differs from that of typical market systems, fundamental analyses in optical engines are mandatory in order to gain a deep understanding of those and to tune new models for improving the mutual support between experiments and simulations. However, it is known that optical accessible engines suffer from significant blow-by collateral flow due to the installation of the optical measure line. Thus, a reliable custom blow-by model capable of being integrated with both mono-dimensional and three-dimensional simulations was developed and validated against experimental data. The model can work for two different configurations: (a) stand-alone, aiming at providing macroscopic data on the ignitable mixture mass loss/recover through the piston rings; (b) combined, in which it is integrated in CFD engine simulations for the local analysis of likely collateral heat release induced by blow-by. Furthermore, once the model was validated, the effect of the engine speed and charge dilution on the blow-by phenomenon in the optical engine were simulated and discussed in the stand-alone mode. |
| first_indexed | 2024-03-10T04:12:33Z |
| format | Article |
| id | doaj.art-d44134d0395245ff8c3eb25bdaeeae40 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T04:12:33Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-d44134d0395245ff8c3eb25bdaeeae402023-11-23T08:09:05ZengMDPI AGEnergies1996-10732021-12-011424856610.3390/en14248566Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical EnginesEdoardo De Renzis0Valerio Mariani1Gian Marco Bianchi2Giulio Cazzoli3Stefania Falfari4Christian Antetomaso5Adrian Irimescu6Department of Industrial Engineering DIN, Alma Mater Studiorum—University of Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Alma Mater Studiorum—University of Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Alma Mater Studiorum—University of Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Alma Mater Studiorum—University of Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Alma Mater Studiorum—University of Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyCNR Science and Technology Institute for Sustainable Energy Mobility, Via Marconi 4, 80125 Napoli, ItalyCNR Science and Technology Institute for Sustainable Energy Mobility, Via Marconi 4, 80125 Napoli, ItalyNowadays reducing green-house gas emissions and pushing the fossil fuel savings in the field of light-duty vehicles is compulsory to slow down climate change. To this aim, the use of new combustion modes and dilution strategies to increase the stability of operations rich in diluent is an effective technique to reduce combustion temperatures and heat losses in throttled operations. Since the combustion behavior in those solutions highly differs from that of typical market systems, fundamental analyses in optical engines are mandatory in order to gain a deep understanding of those and to tune new models for improving the mutual support between experiments and simulations. However, it is known that optical accessible engines suffer from significant blow-by collateral flow due to the installation of the optical measure line. Thus, a reliable custom blow-by model capable of being integrated with both mono-dimensional and three-dimensional simulations was developed and validated against experimental data. The model can work for two different configurations: (a) stand-alone, aiming at providing macroscopic data on the ignitable mixture mass loss/recover through the piston rings; (b) combined, in which it is integrated in CFD engine simulations for the local analysis of likely collateral heat release induced by blow-by. Furthermore, once the model was validated, the effect of the engine speed and charge dilution on the blow-by phenomenon in the optical engine were simulated and discussed in the stand-alone mode.https://www.mdpi.com/1996-1073/14/24/8566blow-by modelblow-by CFD simulationoptical engine simulationoptical engine characterization |
| spellingShingle | Edoardo De Renzis Valerio Mariani Gian Marco Bianchi Giulio Cazzoli Stefania Falfari Christian Antetomaso Adrian Irimescu Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical Engines Energies blow-by model blow-by CFD simulation optical engine simulation optical engine characterization |
| title | Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical Engines |
| title_full | Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical Engines |
| title_fullStr | Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical Engines |
| title_full_unstemmed | Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical Engines |
| title_short | Implementation of a Multi-Zone Numerical Blow-by Model and Its Integration with CFD Simulations for Estimating Collateral Mass and Heat Fluxes in Optical Engines |
| title_sort | implementation of a multi zone numerical blow by model and its integration with cfd simulations for estimating collateral mass and heat fluxes in optical engines |
| topic | blow-by model blow-by CFD simulation optical engine simulation optical engine characterization |
| url | https://www.mdpi.com/1996-1073/14/24/8566 |
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