PRESSURE-BASED UNSTRUCTURED-GRID FINITE-VOLUME METHOD FOR SIMULATING LAMINAR REACTING FLOWS

Abstract

A pressure-based, unstructured, finite-volume method has been developed to resolve accurately the physically and geometrically complex reacting flows. A pressure-correction algorithm together with a conventional operator-splitting procedure was employed to handle the pressure-velocity coupling and the stiff reaction source terms. The conservative forms of the governing equations are integrated over a cell-centered control volume with collocated storage for all transport variables. Computations using detailed chemistry and variable transport properties were performed for a counterflow hydrogen-air diffusion flame and a lifted methane-air triple flame. Numerical results indicate that the present numerical and physical models are quite capable of predicting the essential features and complex structure of laminar nonpremixed and partially premixed flames in terms of flame location, temperature, mass fraction of species, triple flame structure, and lift-off height.