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    Low NOX - LPG staged combustion double swirl flames

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    Type
    Article
    Authors
    Elbaz, Ayman M.
    Moneib, H.A.
    Shebil, K.M.
    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
    2019-01-30
    Online Publication Date
    2019-01-30
    Print Publication Date
    2019-08
    Permanent link to this record
    http://hdl.handle.net/10754/631663
    
    Metadata
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    Abstract
    As a clean, abundant energy source with demonstrated methodologies for producing liquid petroleum gas (LPG) from renewable feedstocks, the growing availability of LPG motivates this study to investigate the utilization of LPG in a staged swirl burner. The burner has an outer and annular swirlers concentric with a central jet, where the flame stability, NO emissions, and flame structure were investigated. The burner allows controlling the degree of mixing by varying swirl angles (θan, θout), and the equivalence ratios of the annular/outer streams (Φan/Φout). The stability mapping showed that the LPG admitted via the annular mixture improves the flame stability more than the outer mixture, and the central fuel injection further improves the flame’s stability. Less segregation between Φan and Φout leads to low NO emissions. Three distinct zones have featured the flame; the recirculation zone (RZ), the reaction zone; and the outer flame zone. High NO concentration was limited to the RZ, so the RZ residence time, mixture strength and temperature at the RZ boundaries are the controlling parameters for NO emissions. The largest θan together with a small θout has a significant effect on reducing the flame temperature and residence time, and thus produces low NO emissions.
    Citation
    Elbaz AM, Moneib HA, Shebil KM, Roberts WL (2019) Low NOX - LPG staged combustion double swirl flames. Renewable Energy 138: 303–315. Available: http://dx.doi.org/10.1016/j.renene.2019.01.070.
    Publisher
    Elsevier BV
    Journal
    Renewable Energy
    DOI
    10.1016/j.renene.2019.01.070
    Additional Links
    https://www.sciencedirect.com/science/article/pii/S0960148119300849
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.renene.2019.01.070
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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