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Conditional Source-Term Estimation as a Method for Chemical Closure in Premixed Turbulent Reacting Flow

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Abstract

A Conditional Source-term Estimation (CSE) model is used to close the mean reaction rates for a turbulent premixed flame. A product-based reaction progress variable is introduced as the conditioning variable for the CSE method. Different presumed probability density function (PDF) models are studied and a modified version of a laminar flame-based PDF model is proposed. Improved predictions of the variable distribution are obtained. The conditional means of reactive scalars are evaluated with CSE and compared to the direct numerical simulation (DNS). The mean reaction rates in a turbulent premixed flame are evaluated with the CSE model and the presumed PDFs. Comparison of the CSE closure method to DNS shows promising results.

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Author notes

  1. R. Grout

    Present address: Combustion Research Facility, Sandia National Laboratories, Livermore, CA, 94551-0969, USA

Authors and Affiliations

  1. Department of Mechanical Engineering, The University of British Columbia, 6250 Applied Science Lane, Vancouver, British Columbia, V6T 1Z4, Canada

    B. Jin & W. K. Bushe

  2. Department of Engineering, The University of Cambridge, Cambridge, CB2 1PZ, UK

    R. Grout

Authors
  1. B. Jin
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  2. R. Grout
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  3. W. K. Bushe
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Correspondence to B. Jin.

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Jin, B., Grout, R. & Bushe, W.K. Conditional Source-Term Estimation as a Method for Chemical Closure in Premixed Turbulent Reacting Flow. Flow Turbulence Combust 81, 563–582 (2008). https://doi.org/10.1007/s10494-008-9148-0

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  • DOI: https://doi.org/10.1007/s10494-008-9148-0

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