| Experimental investigation of the effect of axial flow blockages geometry on combustion parameters of low-swirl natural gas-air premixed flames in laboratory scale burners |
| کد مقاله : 1059-CNF |
| نویسندگان |
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محمدمهدی پارسافر1، کیومرث مظاهری بادی *2، مرتضی نحوی1، امیررضا محمدپور3 1فارغ التحصیل کارشناسی ارشد گروه آموزشی تبدیل انرژی، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران 2استاد گروه آموزشی تبدیل انرژی، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران 3دانشجوی دکترا گروه آموزشی تبدیل انرژی، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران |
| چکیده مقاله |
| Considering the importance of reducing pollutants, especially NOx in low swirl burners (LSBs) in lean combustion, in this paper, combustion parameters of different geometries of perforated plates of axial path of the LSBs are analyzed. For this purpose, 3 perforated plates with similar area blockages and different geometries were placed in axial path of LSB. The investigated combustion parameters are temperature distribution, OH* and H2O* radicals chemiluminescence qualitatively comparison, flame edge detection using Canny edge detection algorithm and exhaust major species analysis including NOx and CO using a gas analyzer. According to the chemiluminescence intensity ratios of OH* in different geometries of the perforated plate at the same area blockage, the heat release rate of the LSB with the larger diameter holes in the center of the perforated plate is higher because in this pattern most of the axial flow is away from wall of the inner axial path which causes a better mixture. But in terms of stability limit and combustion zone temperature uniformity, the plate with larger diameter holes in the outer circle of it, performs better than other geometries due to the wider combustion zone, also 14 percent reduction in NOx emissions is observed in this case. |
| کلیدواژه ها |
| Low-swirl burner, Perforated planes, Chemiluminescence, Exhaust Gas Analysis |
| وضعیت: پذیرفته شده برای ارائه شفاهی |