Comparisons of the soot volume fraction using gravimetric and light extinction techniques

Simultaneous optical and gravimetric measurements were performed in the postflame region of an acetylene/ air premixed flame where the temperature of the soot/gas mixture was reduced to 500 K through nitrogen dilution. By combining gravimetric measurements of the collected soot with soot density measurements using helium pyenometry, an accurate value of the soot volume fraction was obtained. The temperature and soot concentration profiles were...