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    Large Eddy Simulation on the Effects of Pressure on Syngas/Air Turbulent Nonpremixed Jet Flames

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    LESPressure_Manuscript[1].pdf
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    11.14Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Ciottoli, Pietro P.
    Lee, Bok Jik
    Lapenna, Pasquale E.
    Malpica Galassi, Riccardo
    Hernandez Perez, Francisco
    Martelli, Emanuele
    Valorani, Mauro
    Im, Hong G. cc
    KAUST Department
    Clean Combustion Research Center
    Computational Reacting Flow Laboratory (CRFL)
    Mechanical Engineering
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    1975-03 CCF
    Date
    2019-06-24
    Online Publication Date
    2019-06-24
    Print Publication Date
    2020-10-02
    Embargo End Date
    2020-06-24
    Permanent link to this record
    http://hdl.handle.net/10754/656145
    
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    Abstract
    The influence of increasing pressure on nonpremixed syngas/air turbulent jet flames is numerically investigated using large eddy simulations in conjunction with a steady laminar flamelet approach. The applicability of the steady flamelet approach is assessed through an extensive parametric study of laminar counterflow flames and tangential stretching rate analysis on target flame structures at different pressures. Two sets of large eddy simulations, exploring pressure values up to 10 atm, are carried out. The first one (series A) is characterized by a constant jet Reynolds number, while the second one (series B) is characterized by a constant jet inlet velocity. Both campaigns show narrower flame brushes and reduced radical concentrations with increasing pressure. While for series A the flame length is not sensitive to pressure, a longer flame brush is noticed for series B, being mainly caused by the increased mass flow rate. The sensitivity of the local flame behavior to pressure, such as the OH layer thickness and position, is compared to the available experimental results, showing similar trends with a satisfactory agreement.
    Citation
    Ciottoli, P. P., Lee, B. J., Lapenna, P. E., Malpica Galassi, R., Hernández-Pérez, F. E., Martelli, E., … Im, H. G. (2019). Large Eddy Simulation on the Effects of Pressure on Syngas/Air Turbulent Nonpremixed Jet Flames. Combustion Science and Technology, 192(10), 1963–1996. doi:10.1080/00102202.2019.1632300
    Sponsors
    This work was supported by the National Research Foundation of Korea [2013R1A5A1073861, 2017R1A2B4003327]; KAUST [1975-03 CCF Subaward Agreement].
    Publisher
    Informa UK Limited
    Journal
    Combustion Science and Technology
    DOI
    10.1080/00102202.2019.1632300
    Additional Links
    https://www.tandfonline.com/doi/full/10.1080/00102202.2019.1632300
    ae974a485f413a2113503eed53cd6c53
    10.1080/00102202.2019.1632300
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Mechanical Engineering Program; Clean Combustion Research Center; Clean Combustion Research Center

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