Study on ignition and weak flame in heated meso-scale channel

Yosuke Tsuboi, Takeshi Yokomori, Kaoru Maruta

研究成果: Conference contribution

1 引用 (Scopus)

抜粋

If the flame temperature and the reaction speed can be controlled arbitrarily, it is of great help for energy saving through effective utilization of heat generated by combustion. In order to examine the possibility of such mild or moderate combustion, we tried to identify possible weakest flames experimentally with heated meso-scale channel, that is, combustion with controlled heat balance. Results show that the lowest flame speed may exist even though heat loss is compensated by the external heating. For the case of low flow velocity condition, the temperature difference between heated channel wall surface and flame measured by using thermocouple became smaller and smaller with decreasing flow velocity. It implies that there is the lowest flame temperature which corresponds to ignition temperature. To further examine existence and its mechanism of the lowest flame speed, 1-D computations with detailed chemistry were conducted. Computational results show a limit of stable solution in the low velocity region as well as experimental results. Furthermore, diffusive mass transfer was dominant compared to convective mass transfer in the low velocity region. It is probably related to the existence of the lowest flame speed, since the radical species, which is vital for chain reaction, diffuse out from reaction zone.

元の言語English
ホスト出版物のタイトルEnergy Systems
ホスト出版物のサブタイトルAnalysis, Thermodynamics and Sustainability
出版者American Society of Mechanical Engineers (ASME)
ページ155-158
ページ数4
ISBN(電子版)0791843009
DOI
出版物ステータスPublished - 2007 1 1
外部発表Yes
イベントASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, United States
継続期間: 2007 11 112007 11 15

出版物シリーズ

名前ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
6

Other

OtherASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007
United States
Seattle
期間07/11/1107/11/15

    フィンガープリント

ASJC Scopus subject areas

  • Mechanical Engineering

これを引用

Tsuboi, Y., Yokomori, T., & Maruta, K. (2007). Study on ignition and weak flame in heated meso-scale channel. : Energy Systems: Analysis, Thermodynamics and Sustainability (pp. 155-158). (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); 巻数 6). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE200743339