多変数β関数を用いた仮定確率密度関数法に基づく乱流拡散火炎のモデリング(熱工学,内燃機関,動力など)  [in Japanese] Modeling of Turbulent Nonpremixed Flames Based on an Asummed Multivariate β PDF Approach(Thermal Engineering)  [in Japanese]

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Abstract

A numerical simulation based on a moment method is conducted to investigate the feasibility of two assumed probability density function (PDF) approaches in the configuration of a turbulent jet nonpremixed flame. In this study, two multivariate β probability density functions with respect to P(T, Y) and P(h, Y) are employed to account for the turbulence-chemistry interaction. The former assumes the independency of temperature and concentration, and the latter assumes the dependency of enthalpy and concentration. The reaction mechanism is a single-step irreversible reaction including H_2, O_2 and H_2O species. Results are compared with those from measurements and a combined PDF/moment method, which a detailed reaction mechanism was applied. Velocity distributions obtained by the present approaches have shown good agreement with the results of measurements and the combined PDF/moment method. The present approaches provide good prediction in terms of mean scalar field. Variance of each scalar quantity is evaluated better by P(h, Y), but underestimated by P(T, Y). Thereby the probability density function of enthalpy and concentration is preferable for the evaluation of mean reaction rate.

Journal

  • TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 75(759), 2321-2328, 2009

    The Japan Society of Mechanical Engineers

References:  20

Cited by:  1

Codes

  • NII Article ID (NAID)
    110007482747
  • NII NACSIS-CAT ID (NCID)
    AN00187441
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0387-5016
  • NDL Article ID
    10505703
  • NDL Source Classification
    ZN11(科学技術--機械工学・工業)
  • NDL Call No.
    Z16-109
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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