Characteristics of soot formation and decomposition in turbulent diffusion flames

✍ Scribed by Osami Nishida; Seiya Mukōhara

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 588 KB
• Volume: 47
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(82)90106-7

✦ Synopsis

Profiles of soot concentration together with gas species concentrations and temperature are measured in propane/air turbulent diffusion flames of two typically different air inlet temperatures of 50 and 500°C, paying special attention to the roles of gas temperature on the behavior of soot formation and burnout in the flames. Soot is most likely to be produced in the fuel-rich region just inside the flame front, where unburnt hydrocarbons such as CH 4, C2H 4, C2H 6, and C 2 H 2 cracked from the original fuel of C 3 H 8 are observed. The soot burnout occurs mainly in the stoichiometric and fuel lean conditions near the flame front or in the downstream region. When the gas temperature is raised, both the soot formation and burnout rates increase. The final exhaustion of soot is determined by the combined effects of the formation and burnout, which are influenced by the temperature history through the flame.