Numerical Study on Flame Stabilization and NO Formation in a Novel Burner System for Sulfur Combustion.

Numerical simulations have been conducted for a novel double-concentric swirl burner, which is specifically designed for combustion of sulfur with a high power density. The burner serves as a major component of an enclosed conversion cycle, which uses elemental sulfur as a carbon-free chemical energy carrier for storing solar energy. The focus of the work is to assess operability of the burner and NO formation at fuel-lean conditions with an equivalence ratio of ϕ = 0.