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    Macroscopic non-reacting spray characterization of gasoline compression ignition fuels in a constant volume chamber

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    Type
    Article
    Authors
    Du, Jianguo cc
    Mohan, Balaji cc
    Sim, Jaeheon cc
    Fang, Tiegang cc
    Roberts, William L. cc
    KAUST Department
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Clean Combustion Research Center
    Date
    2019-07-25
    Embargo End Date
    2021-07-25
    Submitted Date
    2019-04-25
    Permanent link to this record
    http://hdl.handle.net/10754/668609
    
    Metadata
    Show full item record
    Abstract
    Recently, gasoline compression ignition (GCI) engines have become a topic of interest due to its benefits in high thermal efficiency and low emissions. Combustion in GCI engines is highly governed by the fuel stratification which is strongly associated with the spray characteristics like penetration length. Researchers have proposed both theoretical, and regression models for liquid penetration length of diesel and gasoline direct injection (GDI) spray at non-evaporating conditions. However, there are no models for gasoline sprays at elevated ambient gas temperatures, pressures, and injection pressures in literature. This research gap needs to be bridged, as it is crucial for GCI engine technology. In this study, penetration length was investigated using a high-pressure custom-made multi-hole gasoline injector. High reactivity low carbon fuel (RON 77), designed explicitly for GCI engines, and E10 certification fuel (RON 91) were used and compared. Diffused back illumination (DBI) and shadowgraph were implemented for liquid and vapor phase penetration measurement, respectively. It was found that the spray characteristics of high reactivity fuel were similar to E10 certification fuel under non-reacting conditions. Statistical analysis was performed for both liquid and vapor phase penetration lengths, and empirical models were developed with good agreements to the experimental data under high ambient gas pressure and temperature relevant to GCI engine operating conditions using GCI fuels at higher injection pressures. A ‘separation point’ was defined for the liquid phase after which it reaches a steady state, and it was demonstrated to be different from the ‘breakup time’ found in the literature.
    Citation
    Du, J., Mohan, B., Sim, J., Fang, T., & Roberts, W. L. (2019). Macroscopic non-reacting spray characterization of gasoline compression ignition fuels in a constant volume chamber. Fuel, 255, 115818. doi:10.1016/j.fuel.2019.115818
    Sponsors
    This work was sponsored by Saudi Aramco under the FUELCOM II program and by King Abdullah University of Science and Technology.
    Publisher
    Elsevier BV
    Journal
    Fuel
    DOI
    10.1016/j.fuel.2019.115818
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0016236119311706
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.fuel.2019.115818
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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