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    Investigating Water Injection in Single-Cylinder Gasoline Spark-Ignited Engines at Fixed Speed

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    Name:
    Manuscript_V2_clean.pdf
    Size:
    4.526Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2021-11-22
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    Type
    Article
    Authors
    Singh, Eshan cc
    Hlaing, Ponnya
    Dibble, Robert W. cc
    KAUST Department
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Clean Combustion Research Center
    Date
    2020-11-17
    Embargo End Date
    2021-11-22
    Submitted Date
    2020-09-10
    Permanent link to this record
    http://hdl.handle.net/10754/666053
    
    Metadata
    Show full item record
    Abstract
    Increasingly stringent emission norms have always brought forth innovative measures to improve engine efficiency. Spark-ignited engines have been limited in efficiency, traditionally by knock, and more recently by preignition too. Water injection has recently regained interest as a knock suppressant. The current work explored water injection via port and direct injection at a fixed engine speed of 2000 rpm and varying engine loads. The data presented in this work emphasize that the gains from using water injection are best realized at a specific injection timing (neither too early nor too late), and the effectiveness of water in suppressing knock decreases rapidly with increasing water mass injected. In general, direct water injection offers a more significant knock reduction because of better utilization of the charge cooling effect than port water injection. Engine-out emission confirms a reduction in NOx and CO, while the HC emissions increased when using water injection. No preignition events were observed at the engine load up to 27 bar. Chemical kinetics simulations confirm the role of water in suppressing reactivity under the operating conditions considered in the current study.
    Citation
    Singh, E., Hlaing, P., & Dibble, R. W. (2020). Investigating Water Injection in Single-Cylinder Gasoline Spark-Ignited Engines at Fixed Speed. Energy & Fuels. doi:10.1021/acs.energyfuels.0c03057
    Sponsors
    This work was conducted with the help of several people. Adrian Ichim helped in setting up the engine and solving issues related to the engine. iAV provided a new module to run two separate pumps simultaneously that allowed direct injection of two fluids in the cylinder. The authors would like to thank Saudi Aramco for funding the project under the aegis of FuelCom II.
    Publisher
    American Chemical Society (ACS)
    Journal
    Energy & Fuels
    DOI
    10.1021/acs.energyfuels.0c03057
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.energyfuels.0c03057
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.energyfuels.0c03057
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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