TY - JOUR
T1 - Experimental and numerical analysis of turbulent pulverized coal flame in a coaxial burner
AU - Ahn, Seongyool
AU - Tainaka, Kazuki
AU - Watanabe, Hiroaki
AU - Kitagawa, Toshiaki
N1 - Funding Information:
This study was partly supported by JSPS KAKENHI 25420173 , 16K06125 . And it was supported by Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology , 2013R1A6A3A03027849 as well.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/7/15
Y1 - 2019/7/15
N2 - A hydrogen supported turbulent pulverized coal combustion flame was investigated experimentally and numerically to analyze combustion characteristics and flame structure. The flame was experimentally investigated by direct measurement methods and non-intrusive optical diagnostic methods. Temperature of gaseous phase was observed by a sheathed thermo-couple, while gas composition was examined by a gas analyzer with a sampling probe. Particle dispersion characteristics and velocity were analyzed by Mie scattering and PIV techniques using an optical measurement system. A numerical analysis was simultaneously performed to investigate the flame in detail by means of LES. The simulation was validated by comparing gaseous temperature, velocity and composition results to the experiment. The issued pulverized coal particles were distributed in limited area even in downstream by forming linear shape of flame. The particles moved by forming a cloud in the flame in upstream, but the cloud was broken up in downstream when it passed the flame surface. The characteristics of particle movement and influence of combustion were discussed with the analyses of particle velocity and momentum transfer. The flame structure was discussed with the results of gaseous mole fraction, and NOx formation was numerically investigated in this study.
AB - A hydrogen supported turbulent pulverized coal combustion flame was investigated experimentally and numerically to analyze combustion characteristics and flame structure. The flame was experimentally investigated by direct measurement methods and non-intrusive optical diagnostic methods. Temperature of gaseous phase was observed by a sheathed thermo-couple, while gas composition was examined by a gas analyzer with a sampling probe. Particle dispersion characteristics and velocity were analyzed by Mie scattering and PIV techniques using an optical measurement system. A numerical analysis was simultaneously performed to investigate the flame in detail by means of LES. The simulation was validated by comparing gaseous temperature, velocity and composition results to the experiment. The issued pulverized coal particles were distributed in limited area even in downstream by forming linear shape of flame. The particles moved by forming a cloud in the flame in upstream, but the cloud was broken up in downstream when it passed the flame surface. The characteristics of particle movement and influence of combustion were discussed with the analyses of particle velocity and momentum transfer. The flame structure was discussed with the results of gaseous mole fraction, and NOx formation was numerically investigated in this study.
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U2 - 10.1016/j.energy.2019.04.190
DO - 10.1016/j.energy.2019.04.190
M3 - Article
AN - SCOPUS:85065673490
SN - 0360-5442
VL - 179
SP - 727
EP - 735
JO - Energy
JF - Energy
ER -