Physical and chemical effects of low octane gasoline fuels on compression ignition combustion
Type
ArticleKAUST Department
Clean Combustion Research CenterComputational Reacting Flow Laboratory (CRFL)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2016-09-30Online Publication Date
2016-09-30Print Publication Date
2016-12Permanent link to this record
http://hdl.handle.net/10754/622236
Metadata
Show full item recordAbstract
Gasoline compression ignition (GCI) engines running on low octane gasoline fuels are considered an attractive alternative to traditional spark ignition engines. In this study, three fuels with different chemical and physical characteristics have been investigated in single cylinder engine running in GCI combustion mode at part-load conditions both experimentally and numerically. The studied fuels are: Saudi Aramco light naphtha (SALN) (Research octane number (RON) = 62 and final boiling point (FBP) = 91 °C), Haltermann straight run naphtha (HSRN) (RON = 60 and FBP = 140 °C) and a primary reference fuel (PRF65) (RON = 65 and FBP = 99 °C). Injection sweeps, where the start of injection (SOI) is changed between −60 and −11 CAD aTDC, have been performed for the three fuels. Full cycle computational fluid dynamics (CFD) simulations were executed using PRFs as chemical surrogates for the naphtha fuels. Physical surrogates based on the evaporation characteristics of the naphtha streams have been developed and their properties have been implemented in the engine simulations. It was found that the three fuels have similar combustion phasings and emissions at the conditions tested in this work with minor differences at SOI earlier than −30 CAD aTDC. These trends were successfully reproduced by the CFD calculations. The chemical and physical effects were further investigated numerically. It was found that the physical characteristics of the fuel significantly affect the combustion for injections earlier than −30 CAD aTDC because of the low evaporation rates of the fuel because of the higher boiling temperature of the fuel and the colder in-cylinder air during injection. © 2016 Elsevier LtdCitation
Badra J, Viollet Y, Elwardany A, Im HG, Chang J (2016) Physical and chemical effects of low octane gasoline fuels on compression ignition combustion. Applied Energy 183: 1197–1208. Available: http://dx.doi.org/10.1016/j.apenergy.2016.09.060.Sponsors
This work was sponsored by the Fuel Technology Division at Saudi Aramco R&DC. The surrogate formulation work at King Abdullah University of Science and Technology (KAUST) was supported by KAUST and Saudi Aramco under the FUELCOM program.Publisher
Elsevier BVJournal
Applied EnergyAdditional Links
http://www.sciencedirect.com/science/article/pii/S0306261916313629ae974a485f413a2113503eed53cd6c53
10.1016/j.apenergy.2016.09.060