کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7051731 | 1457382 | 2018 | 41 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermometry of combustion gas measuring two-band near-infrared emissions less than 1.1â¯Î¼m from water molecules
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Thermometry using two-band near-infrared (NIR) emissions less than 1.1â¯Î¼m has been implemented for combustion gases formed on a flat flame burner. The gas temperature was calibrated using a SiC thin filament pyrometry (TFP) above 1500â¯K for H2/air and CH4/air mixtures. The emission spectra were measured with a spectrometer and a monochrome CMOS sensor with an image doubler and two bandpass filters. Two pairs of bandpass filters (850â¯nm/925â¯nm and 975â¯nm/925â¯nm) were tested to measure temperature. Results indicated that strong H2O emissions existed in the NIR region, and they became stronger with an increase in the temperature. The CO2 emission spectra in the NIR region were negligible compared to that of H2O. Calibration temperature lines were obtained as a function of the intensity ratio of the two-band emissions in the NIR region. Using a CMOS camera, the uncertainties of temperature were 59â¯K for 850â¯nm/925â¯nm and 145â¯K for 975â¯nm/925â¯nm. The resolutions were 0.7â¯K for 850â¯nm/925â¯nm and 1â¯K for 975â¯nm/925â¯nm. Using the calibration line, two-dimensional temperature measurements were performed for H2/air flames, CH4/air flames and Bunsen flames of 13A city gas. For the high temperature region above 1500â¯K, a quantitative two-dimensional temperature field was measured for lean and rich combustion. In addition, temperature measurement at high pressure was conducted for combustion gas of propane/air mixture with the equivalence ratio of 0.7 using a rapid compression machine. Temperature could be estimated using the calibration line obtained for the flat flame burner. We have demonstrated the performance and the possibility of thermometry two-band H2O emissions in the NIR region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 94, June 2018, Pages 1-8
Journal: Experimental Thermal and Fluid Science - Volume 94, June 2018, Pages 1-8
نویسندگان
Shinji Nakaya, Tomokazu Funahashi, Yohei Asakami, Ichiyu Fujio, Shuhei Takahashi, Mitsuhiro Tsue,