期刊
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING
卷 43, 期 4, 页码 550-555出版社
JAPAN SOC MECHANICAL ENGINEERS
DOI: 10.1299/jsmeb.43.550
关键词
soot; two-color pyrometry; soot temperature; laminar diffusion flame; pressure; Abel inversion
Soot temperatures were measured using a two-color pyrometry and an Abel inversion technique in co-flow diffusion flames at pressures up to 0.4 MPa. The measured soot temperatures are analyzed along with the soot volume fractions. The oxidation of soot particles ceased at the temperature close to 1400 K. The addition of small amount of air into ethylene does not change the temperature in soot formation regions. The added propane (up to chi (C3H8)=0.27) increases the soot volume fraction without changing soot temperatures in ethylene-propane mixture flames. These results support that the enhanced C3H3 recombination reaction for incipient ring formation is the major contribution for the increase of soot volume fraction and the synergistic effect. The radial profiles of soot temperature are calculated from the line-of-sight soot emission data through an Abel inversion procedure. The effective soot particle brightness temperature is not simply weighted toward the regions of highest soot loading.
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