Assessment of flamelet versus multi-zone combustion modeling approaches for stratified-charge compression ignition engines
The spray-interactive flamelet and extended multi-zone combustion models coupled with multi-dimensional computational fluid dynamics are applied to investigate the effects of charge stratification in a direct-injection compression ignition engine under low load conditions. A parametric study was carried out in order to compare the two approaches for early and late fuel injection timings. Comparison of numerical results with available experimental data shows that for early fuel injection, both models predict the auto-ignition and combustion characteristics with comparable fidelity. As the fuel injection timing is delayed, however, the spray-interactive flamelet model is found to capture the onset of combustion and subsequent heat release with greater accuracy. Further investigation reveals that the better performance of the spray-interactive flamelet model over a wider range of mixture-stratified conditions is mainly attributed to its ability to capture the diffusive transport resulting from small-scale mixing and turbulence–chemistry interaction, which becomes more important when significant mixture inhomogeneities exist in the engine cylinder.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/14680874
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Supplemental Notes:
- © IMechE 2015.
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Authors:
- Pal, Pinaki
- Keum, SeungHwan
- Im, Hong G
- Publication Date: 2016-3
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 280-290
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Serial:
- International Journal of Engine Research
- Volume: 17
- Issue Number: 3
- Publisher: Sage Publications, Incorporated
- ISSN: 1468-0874
- EISSN: 20413149
Subject/Index Terms
- TRT Terms: Combustion; Compression ignition engines; Flames; Fluid dynamics; Fuel injection; Ignition; Mixing; Parametric analysis
- Candidate Terms: Turbulent flow
- Uncontrolled Terms: Homogeneous charge compression ignition
- Subject Areas: Energy; Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01714964
- Record Type: Publication
- Files: TRIS
- Created Date: Aug 27 2019 3:18PM