| Experimental Analysis of lean premixed natural gas-air high swirl flame chemiluminescence and flame spectrum in visible wavelengths |
| کد مقاله : 1064-CNF |
| نویسندگان |
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مرتضی نحوی1، کیومرث مظاهری *2، امیررضا محمدپور3، محمدمهدی پارسافر1 1فارغ التحصیل 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 |
| According to necessity of measuring combustion parameters of a combustion system such as gas turbines using simple and practical methods, in this paper, chemiluminescence of lean premixed natural gas-air high swirl flame of a high swirl burner which is a prevalent burner for gas turbines is analyzed. Visible wavelength range of the spectrum is then compared with flame color, using flame image processing and study of RGB components of flame image, especially for excited species such as CH* and C2*. Results are analyzed at atmospheric pressure condition, equivalence ratio range of 0.4 to 0.8 (lean state), nominal power of 21 kW and swirl number of 0.69. The results from spectroscopy show that because of gaseous lean premixed combustion, chemiluminescence intensities of excited species are much smaller in visible wavelengths. Also in mentioned equivalence ratio range, reaction zone average intensities of CH* and C2* chemiluminescence have the same trend of total reaction zone average intensities of blue and green color respectively. In the end, a fourth-order polynomial was introduced to obtain reaction zone average intensities of CH* and C2* chemiluminescence, using blue and green color intensities respectively and this can be done only by using a digital camera. |
| کلیدواژه ها |
| High swirl flame, Chemiluminescence, Image processing, Lean premixed combustion |
| وضعیت: پذیرفته شده برای ارائه شفاهی |