Experimental and numerical investigation of micro scale hydrogen diffusion flames

T. S. Cheng, Y. C. Chao, C. Y. Wu, Y. H. Li, Y. Nakamura, K. Y. Lee, T. Yuan, T. S. Leu

Research output: Contribution to journalConference article

54 Citations (Scopus)

Abstract

The characteristics of microscale hydrogen diffusion flames produced from sub-millimeter diameter (d = 0.2 and 0.48 mm) tubes were studied using non-intrusive UV Raman scattering coupled with LIPF technique. Qualitative two-dimensional OH imaging indicated that a spherical flame was formed with a radius of about 1 mm as the tube diameter was reduced to 0.2 mm. The coupled effect of ambient air leakage and pre-heating enhanced thermal diffusion of H2 led to lean-burn conditions for the flame. The calculated characteristic features and properties indicated that the buoyancy effect is minor while the flames are in the convectiondiffusion controlled regime because of low Peclet number. The effect of Peclet number on the flame shape was minor as the flame was in the convection diffusion controlled regime. Comparisons between the predicted and measured data indicated that the trends of temperature, major species, and OH distributions are properly modeled. However, the code did not properly predict the air entrainment and pre-heating enhanced thermal-diffusive effects. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

Original languageEnglish
Pages (from-to)2489-2497
Number of pages9
JournalProceedings of the Combustion Institute
Volume30 II
Issue number2
DOIs
Publication statusPublished - 2005 Jan 1
Event30th International Symposium on Combustion - Chicago, IL, United States
Duration: 2004 Jul 252004 Jul 30

Fingerprint

Peclet number
diffusion flames
Hydrogen
flames
Heating
Interleukin-7
Air entrainment
Thermal diffusion
Leakage (fluid)
hydrogen
Buoyancy
Thermal effects
Raman scattering
Imaging techniques
tubes
Air
heating
air
entrainment
thermal diffusion

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

Cite this

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title = "Experimental and numerical investigation of micro scale hydrogen diffusion flames",
abstract = "The characteristics of microscale hydrogen diffusion flames produced from sub-millimeter diameter (d = 0.2 and 0.48 mm) tubes were studied using non-intrusive UV Raman scattering coupled with LIPF technique. Qualitative two-dimensional OH imaging indicated that a spherical flame was formed with a radius of about 1 mm as the tube diameter was reduced to 0.2 mm. The coupled effect of ambient air leakage and pre-heating enhanced thermal diffusion of H2 led to lean-burn conditions for the flame. The calculated characteristic features and properties indicated that the buoyancy effect is minor while the flames are in the convectiondiffusion controlled regime because of low Peclet number. The effect of Peclet number on the flame shape was minor as the flame was in the convection diffusion controlled regime. Comparisons between the predicted and measured data indicated that the trends of temperature, major species, and OH distributions are properly modeled. However, the code did not properly predict the air entrainment and pre-heating enhanced thermal-diffusive effects. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).",
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Experimental and numerical investigation of micro scale hydrogen diffusion flames. / Cheng, T. S.; Chao, Y. C.; Wu, C. Y.; Li, Y. H.; Nakamura, Y.; Lee, K. Y.; Yuan, T.; Leu, T. S.

In: Proceedings of the Combustion Institute, Vol. 30 II, No. 2, 01.01.2005, p. 2489-2497.

Research output: Contribution to journalConference article

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AU - Cheng, T. S.

AU - Chao, Y. C.

AU - Wu, C. Y.

AU - Li, Y. H.

AU - Nakamura, Y.

AU - Lee, K. Y.

AU - Yuan, T.

AU - Leu, T. S.

PY - 2005/1/1

Y1 - 2005/1/1

N2 - The characteristics of microscale hydrogen diffusion flames produced from sub-millimeter diameter (d = 0.2 and 0.48 mm) tubes were studied using non-intrusive UV Raman scattering coupled with LIPF technique. Qualitative two-dimensional OH imaging indicated that a spherical flame was formed with a radius of about 1 mm as the tube diameter was reduced to 0.2 mm. The coupled effect of ambient air leakage and pre-heating enhanced thermal diffusion of H2 led to lean-burn conditions for the flame. The calculated characteristic features and properties indicated that the buoyancy effect is minor while the flames are in the convectiondiffusion controlled regime because of low Peclet number. The effect of Peclet number on the flame shape was minor as the flame was in the convection diffusion controlled regime. Comparisons between the predicted and measured data indicated that the trends of temperature, major species, and OH distributions are properly modeled. However, the code did not properly predict the air entrainment and pre-heating enhanced thermal-diffusive effects. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

AB - The characteristics of microscale hydrogen diffusion flames produced from sub-millimeter diameter (d = 0.2 and 0.48 mm) tubes were studied using non-intrusive UV Raman scattering coupled with LIPF technique. Qualitative two-dimensional OH imaging indicated that a spherical flame was formed with a radius of about 1 mm as the tube diameter was reduced to 0.2 mm. The coupled effect of ambient air leakage and pre-heating enhanced thermal diffusion of H2 led to lean-burn conditions for the flame. The calculated characteristic features and properties indicated that the buoyancy effect is minor while the flames are in the convectiondiffusion controlled regime because of low Peclet number. The effect of Peclet number on the flame shape was minor as the flame was in the convection diffusion controlled regime. Comparisons between the predicted and measured data indicated that the trends of temperature, major species, and OH distributions are properly modeled. However, the code did not properly predict the air entrainment and pre-heating enhanced thermal-diffusive effects. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

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