OCR Text |
Show Temperature (Degree Cl 1.00 Iml 0.80 0.60 0 .40 0.20 0.00 0 .300 . 38 0 .50 0 . 63 0.75 1 .00 1 . 25 1.50 1 . 75 2 . 10 '2 . 45 2 . 60 Iml ~~' Fig. 10:Flame 260 - SR = 85%, 20% FGR - S 0.6, C.A. 320°C IFRF Temperature contours CONCLUSIONS • Natural gas staging gives best results when all gas is injected in ERZ. Delayed gas/air mixing leads to lower flame temp. Jcpull90rw · 10 • Combining natural gas staging and FGR provides: reduction of flame temperature low sensitivity of NOx to heat extraction no increase of CO emissions a slight increase in the flame length |