Case Description

• ·  IFRF MMF 5-2 flame for 2MW pilot furnace
• ·  Square cross section 2 m x 2 m, 6.25 m long with 7 cooling loops
• ·  Measurement location (250, 500, 850, 1250, 1950 mm)
• ·  Air-staged burner (coal + transport air, combustion air)
• ·  There are no tube banks for steam generation in the rear pass in this simulation, with interest confined to furnace region only.

Computational Mesh

• ¼ sector periodic B.C, 420,000 structured cells

Operating Condition

• ·  Total flow rate of the combustion air : 2670 kg/h
• ·  Total flow rate of the transport air : 421 kg/h
• ·  Total flow rate of the coal : 263 kg/h
• ·  Coal anaysis

Physical Models

• ·  Turbulence Model : standard k-ε model
• ·  Combustion Model : EDM (Eddy dissipation model)
• ·  Radiation Model : P-1 model with WSGGM
• ·  Devolatilization Model : Single step model
• ·  Char surface reaction Model : Kinetic / Diffusion model

Results

• ·  Comparison with FLUENT results

• ·  Comparison with experiment data and FLUENT results