A Fast Time-Dependent Code for Evaluation of Experimental Premixed Laminar Flames

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Abstract
A time-dependent flame code designed for the evaluation of experimental premixed laminar flames is described. Measured values of temperature profile and mass flow are used. The calculations start from a kinetic approximation on a coarse grid, which is successively refined, A local implicit chemistry and explicit transport approach, incorporating a multi-component diffusion model, is used. Compared to our simpler earlier code, based on a trace diffusion model, the execution time is reduced by at least a factor of 10. Characteristic features in this new code are use of a time-independent approximation of the transport coefficients, automatic selection of the time-step, and a fast linear equation solver. For two test flames the execution times were a factor 2-3 shorter than the corresponding execution times published using a fast implementation of the steady state method

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