Comparison of soot formation for diesel and jet-a in a constant volume combustion chamber using two-color pyrometry
Type
Conference PaperKAUST Department
Clean Combustion Research CenterMechanical Engineering Program
Physical Science and Engineering (PSE) Division
high-pressure combustion (HPC) Research Group
Date
2014-04-01Permanent link to this record
http://hdl.handle.net/10754/564906
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The measurement of the two-color line of sight soot and KL factor for NO.2 diesel and jet-A fuels was conducted in an optical constant volume combustion chamber by using a high speed camera under 1000 K ambient temperature and varied oxygen concentration conditions. The ambient conditions were set as follows: four oxygen cases including 10%, 15%, 18% and 21% at 1000 K ambient temperature. KL factor and soot temperature were determined based on the two-color pyrometry technique using two band-pass filters with wavelengths of 650 nm and 550 nm. The results show that low soot temperature is observed in the upstream inner flame along the centerline, which is surrounded by high soot temperature regions, and a high KL factor is found in the same region with a low soot temperature. The results under different times suggest that soot temperature is higher for high O2 conditions during the entire flame development; meanwhile, both integrated KL factor and soot area decrease with the increase of O2 concentration. The two fuels share a similar trend of soot temperature and KL factor, however, diesel flame has a higher soot temperature and a larger high soot temperature area compared to jet-A flame. On the other hand, diesel flame shows a lower soot level during the quasi-steady state with a higher total soot level at the end of the combustion under low O2 conditions. A lower O2 concentration range from 10% to 15% is expected to have the possibility to achieve a simultaneous reduction of soot and NOx in sooting flames under the 1000 K ambient temperature condition. Copyright © 2014 SAE International.Citation
Jing, W., Roberts, W., & Fang, T. (2014). Comparison of Soot Formation For Diesel and Jet-A in a Constant Volume Combustion Chamber Using Two-Color Pyrometry. SAE Technical Paper Series. doi:10.4271/2014-01-1251Publisher
SAE InternationalJournal
SAE Technical Paper SeriesConference/Event name
SAE 2014 World Congress and Exhibitionae974a485f413a2113503eed53cd6c53
10.4271/2014-01-1251