Abstract
This work aims at the effect of swirl number on combustion characteristics in a pulverized coal combustor. Particles are injected throw a single central burner orifice carried by a swirling secondary air. Four cases having different swirl number are simulated. The numerical approach is based on Reynolds averaged Navier-stokes (RANS) method using k-e realizable turbulence model along with QUICK discritization scheme. The turbulence-chemistry interaction is modeled using finite rate eddy dissipation model. For validation purpose, numerical results are compared against experimental data. Flow topology, velocity component, temperature and species concentrations in several locations downstream the injection nozzle are presented and analyzed.
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