ARTICLE:

• COMBUSTION/RADIATION/TURBULENCE INTERACTION MODELLING IN NONPREMIXED FLAMES  download article

P. Giordano
Dipartimento di Meccanica e Aeronautica, Università degli Studi di Roma "La Sapienza", Via Eudossiana 18, 1-00184 Roma, Italy

D. Lentini
Dipartimento di Meccanica e Aeronautica, Università degli Studi di Roma "La Sapienza", Via Eudossiana 18, 1-00184 Roma, Italy

ABSTRACT

A model is presented to account for the interaction among combustion, radiation and turbulence in nonpremixed turbulent flames with gas-phase radiation, based on the stretched laminar flamelet (slf) approach. In particular, the effect of heat transfer on combustion is accounted for by introducing the enthalpy defect as an additional fundamental state quantity. The radiative transfer equation (RTE) is solved via the discrete-transfer method, and the effect of fluctuations is accounted for by a suitable averaging procedure, which envisages probability density functions evaluated both at the local level, and along the rays used for integrating the RTE. A test case is discussed, and the effect of fluctuations along a typical ray is quantified. The turbulent combustion regime is also ascertained, by an appropriate extension of Peters' phase-diagram.

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357-364 pages

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