5040 Combustion Mechanism of Rich-Lean Flame Burner controlled Boundary Zone

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  • 5040 さらなる低NO_x化を目的として補助空気を流した濃淡バーナの燃焼特性(J09-2 熱流体輸送および反応流の実験的及び数値的解析(2),J09 熱流体輸送および反応流の実験的及び数値的解析)

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A rich-lean flame burner is widely used for supplying domestic hot water and heating in Japan. This burner has low NO_x and CO emissions, and conventionally consists of a layered structure of lean flame with both sides of rich flame. A new concept burner with air supplied from boundary zone between rich and lean premixed nozzles, produces lower NO_x and CO emissions, although the characteristics of the new burner are clarified only in experiment. In this study, a two-dimensional numerical simulation of the new burner is executed to clarify the mechanism of the lower NO_x and CO emissions compared to conventional burner.

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