Large eddy simulation of a turbulent nonpremixed piloted methane jet flame (Sandia Flame D) |
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| Authors: | MRH Sheikhi TG Drozda P Givi FA Jaberi SB Pope |
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| Institution: | aDepartment of Mechanical Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA;bDepartment of Mechanical Engineering, Michigan State University, East Lansing, MI 48824-1226, USA;cSibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853-1301, USA |
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| Abstract: | Large eddy simulation (LES) is conducted of the Sandia Flame D Proc. Combust. Inst. 27 (1998) 1087, Sandia National Laboratories (2004)], which is a turbulent piloted nonpremixed methane jet flame. The subgrid scale (SGS) closure is based on the scalar filtered mass density function (SFMDF) methodology J. Fluid Mech. 401 (1999) 85]. The SFMDF is basically the mass weighted probability density function (PDF) of the SGS scalar quantities Turbulent Flows (2000)]. For this flame (which exhibits little local extinction), a simple flamelet model is used to relate the instantaneous composition to the mixture fraction. The modelled SFMDF transport equation is solved by a hybrid finite-difference/Monte Carlo scheme. This is the first LES of a realistic turbulent flame using the transported PDF method as the SGS closure. The results via this method capture important features of the flame as observed experimentally. |
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| Keywords: | Large eddy simulation Filter density function Turbulent combustion Nonpremixed flames |
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