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    Laminar Burning Velocities of Fuels for Advanced Combustion Engines (FACE) Gasoline and Gasoline Surrogates with and without Ethanol Blending Associated with Octane Rating

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    Type
    Article
    Authors
    Mannaa, Ossama cc
    Mansour, Morkous S. cc
    Roberts, William L. cc
    Chung, Suk Ho cc
    KAUST Department
    Clean Combustion Research Center
    Combustion and Laser Diagnostics Laboratory
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    high-pressure combustion (HPC) Research Group
    Date
    2016-05-04
    Online Publication Date
    2016-05-04
    Print Publication Date
    2016-05-03
    Permanent link to this record
    http://hdl.handle.net/10754/621744
    
    Metadata
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    Abstract
    Laminar burning velocities of fuels for advanced combustion engines (FACE) C gasoline and of several blends of surrogate toluene reference fuels (TRFs) (n-heptane, iso-octane, and toluene mixtures) of the same research octane number are presented. Effects of ethanol addition on laminar flame speed of FACE-C and its surrogate are addressed. Measurements were conducted using a constant volume spherical combustion vessel in the constant pressure, stable flame regime at an initial temperature of 358 K and initial pressures up to 0.6 MPa with the equivalence ratios ranging from 0.8 to 1.6. Comparable values in the laminar burning velocities were measured for the FACE-C gasoline and the proposed surrogate fuel (17.60% n-heptane + 77.40% iso-octane + 5% toluene) over the range of experimental conditions. Sensitivity of flame propagation to total stretch rate effects and thermo-diffusive instability was quantified by determining Markstein length. Two percentages of an oxygenated fuel of ethanol as an additive, namely, 60 vol% and 85 vol% were investigated. The addition of ethanol to FACE-C and its surrogate TRF-1 (17.60% n-heptane + 77.40% iso-octane + 5% toluene) resulted in a relatively similar increase in the laminar burning velocities. The high-pressure measured values of Markstein length for the studied fuels blended with ethanol showed minimal influence of ethanol addition on the flame’s response to stretch rate and thermo-diffusive instability. © 2016 Taylor & Francis.
    Citation
    Mannaa OA, Mansour MS, Roberts WL, Chung SH (2016) Laminar Burning Velocities of Fuels for Advanced Combustion Engines (FACE) Gasoline and Gasoline Surrogates with and without Ethanol Blending Associated with Octane Rating. Combustion Science and Technology 188: 692–706. Available: http://dx.doi.org/10.1080/00102202.2016.1138812.
    Publisher
    Informa UK Limited
    Journal
    Combustion Science and Technology
    DOI
    10.1080/00102202.2016.1138812
    ae974a485f413a2113503eed53cd6c53
    10.1080/00102202.2016.1138812
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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