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    Working fluid replacement in gaseous direct-injection internal combustion engines: A fundamental and applied experimental investigation

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    Type
    Conference Paper
    Authors
    Sierra-Aznar, Miguel
    Pineda, Daniel I.
    Cage, Bradley S.
    Shi, Xian
    Corvello, Johnathan P.
    Chen, Jyh Yuan
    Dibble, Robert W. cc
    KAUST Department
    Mechanical Engineering Program
    Clean Combustion Research Center
    Physical Science and Engineering (PSE) Division
    Date
    2017-01-01
    Permanent link to this record
    http://hdl.handle.net/10754/666812
    
    Metadata
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    Abstract
    Replacing air with argon theoretically allows for large thermal efficiency increases in internal combustion engines. Before such cycles can be realized, fundamental research on fuel injection into argon and laboratory-scale engine tests are needed. We investigated non-reacting methane jets into argon and nitrogen atmospheres in a constant volume chamber using high-speed schlieren imaging. We subsequently assessed the feasibility of methane direct-injection in a modified single cylinder research engine with an argon-oxygen mixture as the working fluid. We compared engine performance by measuring fuel flow, in-cylinder pressure, torque, and emissions. Results show that the penetration depth and spread angles of methane jets are notably different but not significantly reduced in argon compared to nitrogen. Additionally, running the modified engine with an argon-oxygen mixture in compression ignition operation leads to improvements in efficiency up to 50 percent relative to spark-ignited air cycles, and NOX emissions are nearly eliminated. The results encourage more studies in which the exhausted argon is recycled into the intake.
    Sponsors
    The research was funded in part by the California Energy Commission: Energy Innovations Small Grant No. 5804A/14-07G, and by the King Abdullah University of Science and Technology, Subaward Agreement Ref. No. OSR-2016-CPF-2909-02. The construction of the experiment was made possible by the donation of fuel injection and piping equipment by Bosch and Parker Hannifin, respectively. The authors thank Charles Scudiere for setting up and running the CONVERGE simulations. The authors would like to acknowledge Michael Neufer and Alex Jordan of the Technical and Instructional Support Group of the Department of Mechanical Engineering for their expertise in assembling and operating the Cooperative Fuel Research engine. MSA also wishes to thank Malte Schafer for his assistance in the construction of the engine, Tim Sennott for his ¨ help during the injection experiments and Florian Courbin for his help manufacturing the injector adapters. DIP thanks Jordan Yvette Nerison for the final illustration in Figure 1.
    Publisher
    Eastern States Section of the Combustion Institute
    Conference/Event name
    10th U.S. National Combustion Meeting
    Additional Links
    http://danielipineda.com/Daniel_I._Pineda_files/USnational_2017_APC_DI.pdf
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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