Radiation characteristics and turbulence-radiation interactions in sooting turbulent jet flames

Ranjan S. Mehta, Michael F. Modest, Daniel C. Haworth

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The transported PDF method coupled with a detailed gas-phase chemistry, soot model and radiative transfer equation solver is applied to various turbulent jet flames with Reynolds numbers varying from ∼ 6700 to 15100. Two ethylene-air flames and four flames with a blend of methane-ethylene and enhanced oxygen concentration are simulated. A Lagrangian particle Monte Carlo method is used to solve the transported joint probability density function (PDF) equations, as it can accommodate the high dimensionality of the problem with relative ease. Detailed kinetics are used to accurately model the gas-phase chemistry coupled with a detailed soot model. Radiation is calculated using a particle-based photon Monte Carlo method, which is coupled with the PDF method and the soot model to accurately account for both emission and absorption turbulence-radiation interactions (TRI), using line-by-line databases for radiative properties of CO2 and H2O ; soot radiative properties are also modeled as nongray. Turbulence-radiation interactions can have a strong effect on the net radiative heat loss from sooting flames. For a given temperature, species and soot distribution, TRI increases emission from the flames by 30-60%. Absorption also increases, but primarily due to the increase in emission. The net heat loss from the flame increases by 45-90% when accounting for TRI. This ixs much higher than the corresponding increase due to TRI in nonsooting flames. Absorption TRI was found to be negligible in the laboratory scale sooting flames with soot levels on the order of a few ppm, but may be important in larger industrial scale flames.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Pages77-91
Number of pages15
DOIs
StatePublished - Dec 1 2009
Event2009 ASME Summer Heat Transfer Conference, HT2009 - San Francisco, CA, United States
Duration: Jul 19 2009Jul 23 2009

Publication series

NameProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Volume1

Other

Other2009 ASME Summer Heat Transfer Conference, HT2009
CountryUnited States
CitySan Francisco, CA
Period7/19/097/23/09

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

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    Mehta, R. S., Modest, M. F., & Haworth, D. C. (2009). Radiation characteristics and turbulence-radiation interactions in sooting turbulent jet flames. In Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009 (pp. 77-91). (Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009; Vol. 1). https://doi.org/10.1115/HT2009-88078