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고온 배기가스의 산소농도가 비예혼합화염의 NOx 발생에 미치는 영향
손화승,김호영,Sohn, Hwa-Seung,Kim, Ho-Young 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.6
The present study examined the possibility of NOx reduction in the high temperature industrial furnaces, duct burner of gas turbine cogeneration and two-stage gas turbine combustor. The experimental study was carried out for the non-premixed flame of second stage combustor with the variations of oxygen concentration in the hot exhaust gas of first stage combustor. It also examined the flammability range, temperature and NOx, $CO_2$, $O_2$formation in the combustor with respect to oxygen concentration in which the fuel(natural gas) is supplying into the hot exhaust gas. The results show that the inner temperature of flame reaches 1,20$0^{\circ}C$ at EGR $O_2$23% and that 15ppm of NOx at EGR $O_2$15.5% increases up to 60ppm at EGR $O_2$23%. It is believed that Fenimore's prompt NOx mechanism is more influential on the NOx formation than Zeldovich's thermal NOx mechanism does.