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    Characterization of a non-reacting spray from a hollow cone injector with GCI fuels using phase Doppler anemometry

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    Type
    Conference Paper
    Authors
    Du, Jianguo cc
    Cenker, Emre cc
    Sim, Jaeheon
    Roberts, William L. cc
    KAUST Department
    Clean Combustion Research Center
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    high-pressure combustion (HPC) Research Group
    Date
    2020-01-01
    Permanent link to this record
    http://hdl.handle.net/10754/665266
    
    Metadata
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    Abstract
    The transient spray from a piezo-electric outwardly opening hollow cone injector was analyzed in a constant pressure chamber via 2D phase Doppler anemometry (PDA) technique. Measurements were performed at non-reacting conditions. Injection duration was set to 1.3 ms and two nathpha fuels, namely Haltermann straight run naphtha (HSRN) and J-24 light naphtha (LN), were used. Effects of ambient gas pressure and temperature on spray development were studied. Measurements were performed for analysis of droplet velocity and size development at 25 points about the hollow cone spray edge at three heights at various time delays. Selected measurement locations reveal the different behaviors of droplets inside and outside the spray cone. PDA results show that LN has a slightly higher maximum droplet velocity than the HSRN at the near-nozzle zone due to the lower density of LN and the maximum average droplet velocity decreases significantly with increasing ambient gas density. Droplet velocity vector fields and the DBI images show that circulation zones occur at the outer edge of the spray cone. SMD of the droplets was found to be in the range of 20 microns from this injector operated at 120 bar injection pressure and it gets smaller with increasing gas temperature. This is due to vaporization of droplet on its way to the measurement location. SMD of the droplets increases with increasing gas pressure. This is due to the decreased pressure difference supplied on injector; and the higher probability of droplets' collision and coalescence under higher gas pressure.
    Sponsors
    The research reported in this publication was supported by the Fuel Technology Division at Saudi Aramco R&DC and by the King Abdullah University of Science and Technology (KAUST).
    Publisher
    ILASS � Europe, Institute for Liquid Atomization and Spray Systems
    Conference/Event name
    14th International Conference on Liquid Atomization and Spray Systems, ICLASS 2018
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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