메탄 분류 화염에서의 연소 조건에 따른 NOx 배출 특성

초록

It was numerically studied that NOx emission chatacteristics of confined Ch4 jet flames with the variation of the diameter of inner fuel nozzle, the flow rate of CH4 and equivalence ratio. Parabollic type equations were adopted in the calculation and GRI-2.11 mechanism was used for the chemical reaction. NOx emission index(EINOx) was introduced to evaluate NOx emission quantitatively in parametrically varied flames and the contribution of thermal and prompt NO mechanism was discussed. The results showed that total EINOx varied sensitively with the variation of thr flow rate of CH4 but it was not sensitive to the variation of the diameter of inner fuel nozzle. Thermal EINOx showed the similar tendency to total EINOx and prompt EINOx showed insensitivity to the variation of the diameter of inner fuel nozzle and thr flow rate of CH4