Pyanykh K. NUMERICAL SIMULATION OF LOW-EMISSION NATURAL GAS COMBUSTION AND IMPROVEMENT OF THE BURNER DEVICES BASING UPON THE PROPER SOFTWARE

The combined modeling has been developed of the low-emission natural gas combustion process basing upon combination of the two-stage burning and combustion products recirculation. The model under consideration includes the description of the transport processes as the physical constituents: fluid dynamics, mass- and heat transfer along with the components of chemical kinetics by combustion and by nitrogen oxides formation processes. Flow within the burner facility is presented by means of mechanism of turbulent non-isotermal jets propagation within the coaxial and cross flows in frame of modified Prandtl's theory an of Bussinesque's concept; the mixing process is schematized by means of alternated cells: of perfectly stirred ones (PSR) and of plug flow reactors (PFR). "Reduced" mechanism being proposed by B.Soroka is used in specific form by account of combustion process. The thermal (accordingly Zeldovich-Bowman) and prompt (correspondingly de Soete's mechanism) components of NOx are taken into account by computation of the nitrogen oxides formation. Some recommendations on being proposed grounded upon utilization of mentioned computer code improvement of the low-emission burners, in particular of the FIRB (Forced Internal Recirculation Burners), have been accepted by famous Gas Technology Institute (GTI, USA).