Transport Algorithms for Methane Flames
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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The effects of three different methods of approximating multispecies transport phenomena in models of premixed, laminar, steady-state flames have been studied. The most precise, the most simple and a compromise transport algorithm were used to model methane-oxygen flames at one atmosphere with diluents of nitrogen, argon or helium. The thermodynamic and Lennard-Jones Stockmayer coefficients for individual species were held fixed together with the kinetic network and rate coefficients. ONly the computational algorithms were changed. Within factors of 10-20 we found that the computed flame speeds and species and temperature profiles were independent of the algorithm employed. Since we have previously reported a similar independence for hydrogen-oxygen- nitrogen flames, we infer that this result is a general one.
- Theoretical Mathematics
- Combustion and Ignition