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Validation of unsteady flamelet / progress variable methodology for non-premixed turbulent partially premixed flames

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conference contribution
posted on 19.01.2010, 09:38 by S.K. Sadasivuni, Weeratunge Malalasekera, Salah Ibrahim
This paper highlights the modeling capabilities of UFPV approach for the modeling of turbulent partially premixed lifted flames to capture the extinction and re-ignition phenomena. Large eddy simulation (LES) with the probability density function (PDF) approach provides the turbulence-chemistry interaction. All scalars are represented as a function of mean mixture fraction, mixture fraction variance, mean progress variable and scalar dissipation rate. Mixture fraction is assumed to follow a β-PDF distribution. Progress variable and scalar dissipation rate distributions are assumed to be a δ-PDF. Results are compared with experimental data of a vitiated co-flow burner with fuels like CH4/Air and H2/N2. Results of radial plots for temperature, mixture fraction and scattered data of temperature with mixture fraction at various axial locations are compared. Lift-off height for a CH4/Air flame appears to be over-predicted while the predicted lift-off height for a H2/N2 flame shows an under-prediction.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

SADASIVUNI, S.K., MALALASEKERA, W. and IBRAHIM, S.S., 2009. Validation of unsteady flamelet / progress variable methodology for non-premixed turbulent partially premixed flames. Proceedings of the ECM 2009 Fourth European Combustion Meeting, 14-17 April 2009,Vienna University of Technology, Vienna, Austria, pp.1-8.

Publisher

The Combustion Institute

Version

VoR (Version of Record)

Publication date

2009

Notes

This conference paper was presented at ECM2009. Papers from this conference are freely available at: http://www.combustion.org.uk/ECM_2009/ECM2009Contents.html

Language

en

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