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In-situ Observation of Soot Deposition Behavior in a Diffusion Flame along Solid Wall by using Microgravity Environment  

Choi Jac-Hyuk (한국원자력연구소 원자력수소 사업추진반)
Fujita Osamu (일본 북해도대학 기계우주전공분야)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.29, no.8, 2005 , pp. 907-914 More about this Journal
Abstract
Experiments at the Japan Microgravity Center (JAMIC) have investigated the interaction between diffusion flames and solid surfaces Placed neat flames The fuel for the flames was $C_{2} H_{4}$ The surrounding oxygen concentration was 35$\%$ with surrounding air temperatures of $T_{a}$ : 300K. Especially, the effect of wall temperature on soot deposition from a diffusion flame Placed near the wall has been studied by utilizing microgravity environment, which can attain very stable flame along the wall. Cylindrical burner with fuel injection was adopted to obtain two dimensional soot distributions by laser extinction method. In the experiment two different wall temperatures. $T_{w}$=300, 800 K, were selected as test conditions The results showed that the soot distribution between flame and burner wall was strong1y affected by the wall temperature and soot deposition increases with decrease in wall temperature. The comparison among the values lot two different wall temperatures suggests that the change in thermophoretic effect is the most dominant factor to give the change in soot deposition characteristics.
Keywords
Microgravity; Diffusion flame; Soot deposition; Thermophoretic effect;
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