화학공학소재연구정보센터
Combustion and Flame, Vol.153, No.1-2, 71-83, 2008
Analysis of the flamelet concept in the numerical simulation of laminar partially premixed flames
The aim of this work is to analyze the application of flamelet models based on the Mixture fraction variable and its dissipation rate to the numerical simulation of partially premixed flames. Although the main application of these models is the computation of turbulent. flames, this work focuses on the performance of flamelet concept in laminar flame simulations removing, in this way, turbulence closure interactions. A well-known coflow methane/air laminar flame is selected. Five levels of premixing are taken into account from an equivalence ratio Phi = infinity (nonpremixed) to Phi = 2.464. Results obtained using the flamelet approaches are compared to data obtained from the detailed solution of the complete transport equations using primitive variables. Numerical simulations of a counterflow flame are also presented to support the discussion of the results. Special emphasis is given to the analysis of the scalar dissipation rate modeling. (C) 2008 The Combustion Institute. Published by Elsevier Inc. All rights reserved.