The effect of inert dilution on flickering motions of jet diffusion flames

Chia Wei Hu, Chih Hsuan Chen, Shuhn Shyurng Hou, Ta-Hui Lin

Research output: Contribution to conferencePaper

Abstract

In this study, we aimed at investigating the instability of jet flames caused by the buoyancy effects called “axial flickering.” The results showed that the flickering frequency in the high velocity range was lower than that in the low velocity range. In the high velocity range, the flickering frequency was about 11 Hz, which was nearly independent of the flow velocity and gas composition. However, in the low velocity range, the flickering frequency decreased with an increase in flow velocity, and the flickering frequency decreased with increasing methane concentration. The flickering frequencies at low velocities were in the range of 11~15 Hz. The relation between St and Fr is St ∝ Fr− m , and the value of m is between 0.495 and 0.550.

Original languageEnglish
Publication statusPublished - 2009 Jan 1
Event7th Asia-Pacific Conference on Combustion, ASPACC 2009 - Taipei, Taiwan
Duration: 2009 May 242009 May 27

Conference

Conference7th Asia-Pacific Conference on Combustion, ASPACC 2009
CountryTaiwan
CityTaipei
Period09-05-2409-05-27

Fingerprint

Flickering
diffusion flames
Dilution
dilution
low speed
Flow velocity
flow velocity
gas composition
buoyancy
Methane
Buoyancy
methane
Gases
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Chemical Engineering(all)

Cite this

Hu, C. W., Chen, C. H., Hou, S. S., & Lin, T-H. (2009). The effect of inert dilution on flickering motions of jet diffusion flames. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.
Hu, Chia Wei ; Chen, Chih Hsuan ; Hou, Shuhn Shyurng ; Lin, Ta-Hui. / The effect of inert dilution on flickering motions of jet diffusion flames. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.
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Hu, CW, Chen, CH, Hou, SS & Lin, T-H 2009, 'The effect of inert dilution on flickering motions of jet diffusion flames', Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan, 09-05-24 - 09-05-27.

The effect of inert dilution on flickering motions of jet diffusion flames. / Hu, Chia Wei; Chen, Chih Hsuan; Hou, Shuhn Shyurng; Lin, Ta-Hui.

2009. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.

Research output: Contribution to conferencePaper

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AU - Lin, Ta-Hui

PY - 2009/1/1

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AB - In this study, we aimed at investigating the instability of jet flames caused by the buoyancy effects called “axial flickering.” The results showed that the flickering frequency in the high velocity range was lower than that in the low velocity range. In the high velocity range, the flickering frequency was about 11 Hz, which was nearly independent of the flow velocity and gas composition. However, in the low velocity range, the flickering frequency decreased with an increase in flow velocity, and the flickering frequency decreased with increasing methane concentration. The flickering frequencies at low velocities were in the range of 11~15 Hz. The relation between St and Fr is St ∝ Fr− m , and the value of m is between 0.495 and 0.550.

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Hu CW, Chen CH, Hou SS, Lin T-H. The effect of inert dilution on flickering motions of jet diffusion flames. 2009. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.