Staff

The combustion of solid fuel particles is investigated under various flow configurations, therefore, allowing for a detailed understanding of the influence of turbulence, particle number density, and oxidizer compositions on the ignition and combustion of coal and biomass. For this purpose, two test rig environments equipped with optical diagnostics systems are used in project B7 of SFB/TRR 129. Experimental studies conducted in a laminar flow reactor enable a deeper insight into the different stages of single particle combustion as well as particle cloud flames for low flow rates. A microwave plasma heater (Fig. 1) is utilized for studying the interaction between auto-igniting particles and the turbulence properties of the surrounding oxidizer flow. Optical diagnostics such as laser-induced fluorescence (LIF), diffuse back-illumination (DBI), and particle image velocimetry (PIV) are applied to gather extensive experimental data sets. The combination of the findings from both test bench environments enable a better comprehension of the combustion in oxy-fuel conditions as well as the improvement of associated numerical models.