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Spherical turbulent flame propagation of pulverized coal particle clouds in an O₂/N₂ atmosphere
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| Title: | Spherical turbulent flame propagation of pulverized coal particle clouds in an O₂/N₂ atmosphere |
| Authors: | Hadi, Khalid Browse this author | | Ichimura, Ryo Browse this author | | Hashimoto, Nozomu Browse this author →KAKEN DB | | Fujita, Osamu Browse this author →KAKEN DB |
| Keywords: | Coal combustion | | Flame propagation | | Turbulence intensity | | Spherical flame | | Turbulent combustion |
| Issue Date: | Jan-2019 |
| Publisher: | Elsevier |
| Journal Title: | Proceedings of the Combustion Institute |
| Volume: | 37 |
| Issue: | 3 |
| Start Page: | 2935 |
| End Page: | 2942 |
| Publisher DOI: | 10.1016/j.proci.2018.09.021 |
| Abstract: | The present study aims to clarify the effects of turbulence intensity and coal concentration on the spherical turbulent flame propagation of a pulverized coal particle cloud. A unique experimental apparatus was developed in which coal particles can be dispersed homogeneously in a turbulent flow field generated by two fans. Experiments on spherical turbulent flame propagation of pulverized coal particle clouds in a constant volume spherical chamber in various turbulence intensities and coal concentrations were conducted. A common bituminous coal was used in the present study. The flame propagation velocity was obtained from an analysis of flame propagation images taken using a high-speed camera. It was found that the flame propagation velocity increased with increasing flame radius. The flame propagation velocity increases as the turbulence intensity increases. Similar trends were observed in spherical flames using gaseous fuel. The coal concentration has a weak effect on the flame propagation velocity, which is unique to pulverized coal combustions in a turbulent field. These are the first reports of experimental results for the spherical turbulent flame propagation behavior of pulverized coal particle clouds. The results obtained in the present study are obviously different from those of previous pulverized coal combustion studies and any other results of gaseous fuel combustion research. |
| Rights: | © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/81987 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 橋本 望
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