Development of a reduced four-component (toluene/n-heptane/iso-octane/ethanol) gasoline surrogate model
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ArticleAuthors
Li, YangAlfazazi, Adamu
Mohan, Balaji

Alexandros Tingas, Efstathios
Badra, Jihad
Im, Hong G.

Sarathy, Mani

KAUST Department
Chemical Engineering ProgramClean Combustion Research Center
Combustion and Pyrolysis Chemistry (CPC) Group
Computational Reacting Flow Laboratory (CRFL)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2019-03-13Online Publication Date
2019-03-13Print Publication Date
2019-07Permanent link to this record
http://hdl.handle.net/10754/652955
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The prospect of blending gasoline fuel with ethanol is being investigated as a potential way to improve the knock residence of the base gasoline. However, one of the drawbacks is a lack of proper understanding of the reason for the non-linear response of blending ethanol and gasoline. This non-linearity could be better understood by an improved knowledge of the interactions of these fuel components at a molecular level. This study proposed a highly reduced four-component (toluene/n-heptane/iso-octane/ethanol) gasoline surrogate model containing 59 species and 270 reactions. The model was reduced using the direct relation graph with expert knowledge (DRG-X) (Lu and Law, 20015; Lu et al., 2011) and isomer lumping method. The computational singular perturbation (CSP) analysis were performed to reduce the potential stiffness issues by accordingly adjusting the Arrhenius coefficients of the proper reactions. The model has been comprehensively validated against wide range of ignition delay times (IDT) and flame speed (FS) measurement data as well as compared against two representative literature models from Liu et al. (2013) and Wang et al. (2015). Overall, good agreements were observed between model predictions and experimental data across the entire research octane number (RON), equivalence ratio, pressure and temperature range. In addition, the model has also been coupled with the computational fluid dynamic (CFD) models to simulate the experimental data of constant volume reacting spray of a low-octane gasoline (Haltermann straight-run naphtha), and in-cylinder pressures and temperatures of a high-octane gasoline (Haltermann Gasoline) combustion in a heavy duty compression ignition engine. The coupled model can qualitatively predict the experimentally obtained data with an improved performance for PRF, TPRF, and TPRF-ethanol surrogates.Citation
Li Y, Alfazazi A, Mohan B, Alexandros Tingas E, Badra J, et al. (2019) Development of a reduced four-component (toluene/n-heptane/iso-octane/ethanol) gasoline surrogate model. Fuel 247: 164–178. Available: http://dx.doi.org/10.1016/j.fuel.2019.03.052.Sponsors
The authors acknowledge the support from KAUST and Saudi Aramco under the FUELCOM project.Publisher
Elsevier BVJournal
FuelAdditional Links
https://www.sciencedirect.com/science/article/pii/S0016236119304247ae974a485f413a2113503eed53cd6c53
10.1016/j.fuel.2019.03.052