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Effect of gas−phase carbon depletion by sooting on the structure of methane/air flamelets

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1770
pages 1732-1741

F. Bonifazi
Dipartimento di Ingegneria Meccanica e Aerospaziale, Sapienza Universit`a di Roma, Via Eudossiana 18, I–00184 Roma, Italy

Diego Lentini
Dipartimento di Ingegneria Meccanica e Aerospaziale, Sapienza Universita di Roma, Via Eudossiana 18, 00184 Roma, Italy

Sinopsis

The paper describes an approach to soot formation/oxidation in turbulent flames which accounts for the effect of gas−phase carbon depletion due to sooting. A scaled gas−phase elemental carbon mass fraction is introduced and, in the framework of a laminar flamelet approach, a library is developed for use in turbulent models, for nonpremixed methane/air flames at 1 atm and 3 atm pressure. Results indicate a significant effect on soot precursors in particular.

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