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A Study on the Effect of Turbulent Combustion upon Soot Formation in Premixed Constant-Volume Propane Flames  

배명환 (경상대학교 기계항공공학부)
안수환 (경상대학교 기계항공공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.27, no.7, 2003 , pp. 889-898 More about this Journal
Abstract
The soot yield is studied by a premixed propane-oxygen-inert gas combustion in a specially designed disk-type constant-volume combustion chamber to investigate the effect of turbulence on soot formation. Premixtures are simultaneously ignited by eight spark plugs located on the circumference of chamber at 45 degree intervals in order to observe the soot formation under high pressures and high temperatures. The eight flames converged compress the end gases to a high pressure. The laser schlieren and direct flame photographs for observation field with 10 mm in diameter are taken to examine into the behaviors of flame front and gas flow in laminar and turbulent combustion. The soot volume fraction in the chamber center during the final stage of combustion at the highest pressure is measured by the in situ laser extinction technique and simultaneously the corresponding burnt gas temperature by the two-color pyrometry method. It is found that the soot yield of turbulent combustion decreases in comparison with that of laminar combustion because the burnt gas temperature increases with the drop of heat loss.
Keywords
Turbulent Combustion; Soot Formation; Premixed Constant-Volume Flame; High Pressure and High Temperature; Laser Schlieren and Direct Flame Photographs; Laser Extinction Technique;
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