PSR-based microstructural modeling for turbulent combustion processes and pollutant formation in double swirler combustors

The present study numerically investigates the fuel-air mixing characterist ics. flame structure, and pollutant emission inside a double-swirler combus tor. A PSR (Perfectly Stirred Reactor) based microstructural model is emplo yed to account for the effects of finite rate chemistry on the name structu re and NO formation. The turbulent combustion model is extended to nonadiab atic name condition with radiation by introducing an enthalpy variable, and the radiative heat loss is calculated by a local, geometry-independent mod el. The effects of turbulent fluctuation are taken into account by the join t assumed PDFs. Numerical model is based on the non-orthogonal body-fitted coordinate system and the pressure/velocity coupling is handled by PISO alg orithm in context with the finite volume formulation. The present PSR-based turbulent combustion model has been applied to analyze the highly intense turbulent nonpremixed flame field in the double swirler combustor. The deta iled discussions were made for the flow structure, combustion effects on fl ow structure, flame structure, and emission characteristics in the highly i ntense turbulent swirling flame of the double swirler burner.