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대한기계학회 대한기계학회 논문집 B권 대한기계학회논문집 B권 제28권 제2호
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    초록·키워드

    Combustion using oxygen enriched air is known as a technology which can increase thermal efficiency due to increase of the flame temperature. Flame shapes, schlieren photos, OH radical chemiluminescence and local flame temperature were examined as a function of OEC(Oxygen Enriched Concentration) in a coaxial non-premixed jet. With increase of OEC, flame length and width decreased, but its brightness increased significantly, and the size of vortices in the flame also increased. Especially, the reaction around the flame surface became active. The strong OH intensity appeared to be made and moved from middle stream to upper one with increase of OEC, which shows combustion reaction in the upper stream becomes more dominant In addition, the temperature distributions of the flames showed similar tendency with 01-1 radical intensities. A flame with high temperature and strong stability was obtained with increasing OEC of the coflow.

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      UCI(KEPA) : I410-ECN-0101-2009-550-014045225