Simulation of turbulent piloted methane non-premixed flame based on combination of finite-rate/eddy-dissipation model

Two chemical kinetic mechanisms of methane combustion were tested and compared using a piloted axisymmetric turbulent non-premixed flame: 1-step and 4-step mechanism, to predict the temperature and species distributions. The numerical results are presented and compared with the experimental data. A 4-step methane mechanism was successfully implanted into CFD solver Fluent. The numerical solution is in very good agreement with previous numeral of 4-step mechanism and the experimental data.Original Abstract: Naudojant valdoma simetrine turbulentine nesumaisyta liepsna buvo testuojami ir lyginami du metano degimo cheminiai kinetiniai mechanizmai: 1-ojo zingsnio (pagal Westbrooka ir Dryeri) ir 4-ojo zingsnio (pagal Jonesa ir Lindstedta) temperaturos ir molekuliu rusies pasiskirstymas. Skaiciavimo rezultatai palyginti su eksperimentiniais. 4-ojo zingsnio metano degimo mechanizmas buvo sekmingai idiegtas i skaitmenine skyscio dinamikos programa Fluent. Skaitmeninis sprendinys gerai dera su 4-ojo zingsnio degimo mechanizmo eksperimentiniais rezultatais.