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

Yosuke Tsuboi, Takeshi Yokomori, Kaoru Maruta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages155-158
Number of pages4
Volume6
ISBN (Print)0791843009
DOIs
Publication statusPublished - 2007
Externally publishedYes
EventASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, United States
Duration: 2007 Nov 112007 Nov 15

Other

OtherASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007
CountryUnited States
CitySeattle
Period07/11/1107/11/15

Fingerprint

Ignition
Flow velocity
Mass transfer
Temperature
Thermocouples
Heat losses
Energy conservation
Heating
Hot Temperature

Keywords

  • Extinction limit
  • Ignition
  • Lowest flame temperature

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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

Study on ignition and weak flame in heated meso-scale channel. / Tsuboi, Yosuke; Yokomori, Takeshi; Maruta, Kaoru.

ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). Vol. 6 American Society of Mechanical Engineers (ASME), 2007. p. 155-158.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tsuboi, Y, Yokomori, T & Maruta, K 2007, Study on ignition and weak flame in heated meso-scale channel. in ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). vol. 6, American Society of Mechanical Engineers (ASME), pp. 155-158, ASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007, Seattle, United States, 07/11/11. https://doi.org/10.1115/IMECE200743339
Tsuboi Y, Yokomori T, Maruta K. Study on ignition and weak flame in heated meso-scale channel. In ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). Vol. 6. American Society of Mechanical Engineers (ASME). 2007. p. 155-158 https://doi.org/10.1115/IMECE200743339
Tsuboi, Yosuke ; Yokomori, Takeshi ; Maruta, Kaoru. / Study on ignition and weak flame in heated meso-scale channel. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). Vol. 6 American Society of Mechanical Engineers (ASME), 2007. pp. 155-158
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