Journal of the Electrochemical Society, Vol.141, No.8, 2024-2029, 1994
Infrared-Laser Measurements of HBr Near the Filament of a Tungsten Halogen Lamp
Infrared laser absorption spectroscopy is used to get temperature and density information on a chemically active species, HBr, with spatial resolution near the filament of an operating tungsten-halogen (W-X) lamp. The results are then compared with computer generated fluid flow and heat-transfer model predictions in combination with assumptions of local thermodynamic chemical equilibrium (LTCE) for the thermal dissociation of HBr. Initial experimental results, and comparisons with the fluid flow computer predictions, give evidence for the possible breakdown of LTCE in the high convective flow region just above the filament.