Numerical analysis of natural gas combustion in an industrial furnace

U ovom radu numerički putem je simulirano izgaranje prirodnog plina u industrijskoj peći učina 300kW. Za simulaciju je korišten komercijalan softverski program FLUENT tvrtke ANSYS. Prikazan je matematički model koji opisuje izgaranje. Turbulencije su modelirane RANS (Reynolds Averaged Navier-Stokes) pristupom temeljen na Boussinesqovoj hipotezi turbulentne viskoznosti. Izgaranje je modelirano pomoću modela izgaranja bez prethodnog miješanja unutar programa FLUENT. Zračenje je modelirano pomoću DO modela zračenja. Prvi dio rada opisuje teoretska znanja vezana za teoriju izgaranja, dok se drugi dio odnosi na postavljanje simulacije gdje je opisan tijek provođenja numeričke simulacije. Na kraju su prikazani podaci dobiveni numeričkim i analitičkim putem.At this study the combustion of an industrial furnace has been numerically simulated. For the simulation a commercial software FLUENT by the company ANSYS has been used. A mathematical model that describes the combustion can be examined at this paper. Turbulences were modeled by RANS (Reynolds Averaged Navier-Stokes) approach based on Boussinesq hypothesis of turbulent viscosity. Combustion has been modeled with a non premixed combustion model within the FLUENT software. Radiation was modeled by DO radiation model. First part of the study describes the theoretical knowledge of combustion theory, while the second part describs simulation set up and the entire simulation process. Numerical and analytical results are show at the end of the study