Fuel-air mixing in motored CFR engine at research octane number (RON) relevant condition.
In: International Journal of Engine Research (Sage Publications, Ltd.), Jg. 25 (2024-04-01), Heft 4, S. 727-742
academicJournal
Zugriff:
This paper presents a three-dimensional (3-D) computational fluid dynamics (CFD) study of a motored cooperative fuel research (CFR) engine at research octane number (RON) relevant condition. The boundary conditions for 3-D simulations were generated with a one-dimensional GT-Power model. For the first time in literature, a carburetor was added to a virtual CFR engine model with 3-D CFD. Therefore, the proposed setup can simulate the fuel and thermal stratifications inside the engine cylinder with realistic detail. The transient simulations in this work were performed within the Reynolds-averaged Navier-Stokes (RANS) framework with a Realizable k-ε turbulence model. Major conclusions from the present work are: (1) The in-cylinder flow of the CFR engine is swirl-dominated due to the existence of the intake valve shroud. (2) There is a significant amount of liquid droplets entering the cylinder during the intake stroke. The maximum instantaneous amount of liquid for 50% PRF 87 (containing 87% iso-octane and 13% n-heptane (v/v)) and 50% ethanol mixture is indicated to be around 26% of total injected fuel mass. (3) The heat of vaporization (HoV) of the fuel is responsible for creating both temperature and charge stratification inside the cylinder. [ABSTRACT FROM AUTHOR]
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Titel: |
Fuel-air mixing in motored CFR engine at research octane number (RON) relevant condition.
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Autor/in / Beteiligte Person: | Bhattacharya, Atmadeep ; Keskinen, Karri ; Larmi, Martti ; Pal, Pinaki ; Kroyan, Yuri ; Sarjovaara, Teemu ; Kaario, Ossi |
Zeitschrift: | International Journal of Engine Research (Sage Publications, Ltd.), Jg. 25 (2024-04-01), Heft 4, S. 727-742 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 1468-0874 (print) |
DOI: | 10.1177/14680874231206198 |
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