A study of the turbulent jet flow field in a methane fueled turbulent jet ignition (TJI) system

Masumeh Gholamisheeri, Indrek S. Wichman, Elisa Toulson

    Research output: Research - peer-reviewArticle

    • 1 Citations

    Abstract

    This paper analytically and computationally examines the transient jet used to ignite combustible mixtures during Turbulent Jet Ignition (TJI). In TJI the ignition source, which originates in the prechamber, enters through a connecting nozzle into the main chamber as a transient high temperature jet of reacted mixture, reacting mixture and active radicals. A Computational Fluid Dynamics (CFD) model is developed for the flow field, density gradients, turbulence intensity, and temperature fields in both the prechamber and the main chamber. None of these quantities are currently measurable. The pressure traces computed using four (4) comprehensive chemical kinetic mechanisms (San Diego, Aramco, GRI, and, NUI) and one (1) reduced chemical kinetic mechanism are compared with the experimental pressure data. Results indicate that none of the mechanisms are in complete agreement, however they are in good agreement with the experimental burn rate, peak pressure and ignition delay predictions. Comparison is made of the simulations with high speed chemiluminescence images of combustion and measured pressure traces in a Rapid Compression Machine (RCM). The influences of nozzle size and mixture stoichiometry on jet penetration speed and combustion performance are investigated. Normalized transient results are presented that produce good agreement between the various classes of model predictions. A discussion is provided of a new correlation model for the transient TJI process.

    LanguageEnglish (US)
    Pages194-206
    Number of pages13
    JournalCombustion and Flame
    Volume183
    DOIs
    StatePublished - Sep 1 2017

    Profile

    ignition systems
    turbulent jets
    jet flow
    ignition
    flow distribution
    methane
    Ignition systems
    Methane
    Flow fields
    Ignition
    nozzles
    reaction kinetics
    chambers
    predictions
    Reaction kinetics
    Nozzles
    chemiluminescence
    computational fluid dynamics
    dynamic models
    stoichiometry

    Keywords

    • Combustion visualization
    • Turbulent jet ignition

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Fuel Technology
    • Energy Engineering and Power Technology
    • Physics and Astronomy(all)

    Cite this

    A study of the turbulent jet flow field in a methane fueled turbulent jet ignition (TJI) system. / Gholamisheeri, Masumeh; Wichman, Indrek S.; Toulson, Elisa.

    In: Combustion and Flame, Vol. 183, 01.09.2017, p. 194-206.

    Research output: Research - peer-reviewArticle

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