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Third Symposium on Turbulence and Shear Flow Phenomena
June, 25-27, 2003, International Center, Sendai, Japan

DOI: 10.1615/TSFP3

COMPARATIVE STUDY OF TURBULENCE AND CHEMISTRY MODELS ON SIMULATION RESULTS FOR A METHANE/AIR JET DIFFUSION FLAME

pages 597-602
DOI: 10.1615/TSFP3.1010
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RESUMO

The importance of different submodels in numerical simulations of a turbulent non-premixed flame, is studied. To that purpose, different types of RANS turbulence models are compared: the standard k − ε model (Jones, 1994), a non-linear k − ε model with a sophisticated transport equation for the dissipation rate ε (Merci, 2002a, 2002b) and a differential second-moment Reynolds stress model (Jones, 1994). Also different chemistry models are considered, from a (constrained) equilibrium model (Bilger, 1983) to an ILDM method (Maas, 1992; Schmidt, 1996). Finally, the interaction between turbulence and chemistry is described at different levels: the classical pre-assumed β-PDF approach is compared to an extended multivariate pre-assumed PDF method (Repp, 2002; Landenfeld, 2002). It is concluded that for the test case under study (Sandia 'Flame D' (Barlow, 1998; TNF, 2003)), the turbulence model has the major effect on the main results, except when chemical species are of interest.

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