Numerical simulation of natural gas combustion in industrial furnace

U prvom dijelu ovog rada opisan je prirodni plin, sastav i fizikalno-kemijska svojstva. Ukratko je opisan proizvodni lanac koji se sastoji od pronalaska ležišta plina i bušenja, zatim obrade sirovog prirodnog plina, transporta i skladištenja. U drugom dijelu rada opisane su jednadžbe očuvanja potrebne za numeričko modeliranje izgaranja. Turbulencije su modelirane RANS metodom, izgaranje je modelirano modelom izgaranja bez prethodnog miješanja, a zračenje DO modelom. Numerička simulacija je izrađena u specijaliziranom programu Ansys Fluent. Na kraju su rada prikazani numerički rezultati izgaranja prirodnog plina bez prethodnog miješanja.The first part of this paper describes natural gas, composition and physicochemical properties. The production chain is briefly described, which consists of the discovery of gas deposits and drilling, then the processing of crude natural gas, transport and storage. The second part of the paper describes the conservation equations required for numerical combustion modeling. Turbulences were modeled by the RANS method, combustion was modeled by the non-premixed combustion model, radiation by the DO model. The numerical simulation was made in the specialized program Ansys Fluent. At the end of the paper, the numerical results of natural gas combustion without prior mixing are presented