This paper reports the first set of measurements of the influence of concentrated solar radiation on the soot volume fraction in a laminar sooty flame. Broad-band radiation at fluxes of up to 0.45 MW/m2 and wavelengths that simulate those in concentrated solar receivers was produced by a metal-halide lamp configured in a series of three optical concentrators to irradiate an entire Santoro-type laminar flame of 64 mm length. The soot volume fraction in the flame was measured using planar laser induced incandescence. The results show that there is a significant influence of the simulated concentrated solar radiation on the evolution of soot on the fuel-rich side of the flame. The soot volume enveloped by the flame is found to increase by up to 55% when a flame is irradiated by a solar simulator. In addition, the soot inception was translated upstream by 4 mm with simulated solar radiation compared with that without, while the consumption rate of soot remains the same for both cases.
|Original language||English (US)|
|Title of host publication||ASPACC 2015 - 10th Asia-Pacific Conference on Combustion|
|State||Published - Jan 1 2015|