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http://dx.doi.org/10.3795/KSME-B.2009.33.7.477

The Effect of N2 Dilution on the Flame Stabilization in a Non-Premixed Turbulent H2 Jet with Coaxial Air  

Oh, Jeong-Seog (서울대학교 대학원 기계항공공학부)
Yoon, Young-Bin (서울대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.33, no.7, 2009 , pp. 477-485 More about this Journal
Abstract
The study of nitrogen dilution effect on the flame stability was experimentally investigated in a non-premixed turbulent lifted hydrogen jet with coaxial air. Hydrogen gas was used as a fuel and coaxial air was used to make flame liftoff. Each of hydrogen and air were injected through axisymetric inner and outer nozzles ($d_F=3.65\;mm$ and $d_A=14.1\;mm$). And both fuel jet and coaxial air velocity were fixed as $u_F=200\;m/s$ and $u_A=16\;m/s$, while the mole fraction of nitrogen diluents gas was varied from 0.0 to 0.2 with 0.1 step. For the analysis of flame structure and the flame stabilization mechanism, the simultaneous measurement of PIV/OH PLIF laser diagnostics had been performed. The stabilization point was selected in the most upstream region of the flame base and defined as the point where the turbulent flame propagation velocity was equal to the axial component of local flow velocity. We found that the turbulent flame propagation velocity increased with the decrease of nitrogen mole fraction. We concluded that the turbulent flame propagation velocity was expressed as a function of turbulent intensity and axial strain rate, even though nitrogen diluents mole fraction was changed.
Keywords
Flame Stabilization; Lifted Hydrogen Flame; Turbulent Flow; Nitrogen Dilution; Simultaneous Measurement;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Mizobuchia, Y., Shinjoa, J., Ogawaa, S. and Takeno, T., 2005, 'A Numerical Study on the Formation of Diffusion Flame Islands in a Turbulent Hydrogen Jet Lifted Flame,' Proc. Combust. Inst., Vol. 30, pp. 611-619   DOI   ScienceOn
2 Tacke, M. M., Geyer, D., Hassel, E. P. and Janicka, J., 1998, 'A Detailed Investigation of the Stabilization Point of Lifted Turbulent Diffusion Flames,' Proc. Combust. Inst., Vol. 27, pp. 1157-1165   DOI   ScienceOn
3 Han, D. and Mungal, M.G., 2000, 'Observations on the Transition from Flame Liftoff to Flame Blowout,' Proc. Combust. Inst., Vol. 28, pp. 537-543   DOI   ScienceOn
4 Lamoureux, N., Djebacili-Chaumeix, N. and Paillard, C.E., 2003 'Laminar Flame Velocity Determination for $H_2-Air-He-O_2$ Mixtures Using the Spherical Bomb Method,' Experimental Thermal and Fluid Science, Vol. 27, pp. 385-393   DOI   ScienceOn
5 Candel, S.M. and Poinsot, T.J., 1990, 'Flame Stretch and the Balance Equation for the Flame Area,' Combust. Sci. Technol., Vol. 70, pp. 1-15   DOI   ScienceOn
6 Lipatnikov, A. N. and Chomiak, J, 2002, 'Turbulent Flame Speed and Thickness: Phenomenology, Evolution, and Application in the Multi-Dimensional Simulations,' Progress in Energy and Combustion Science, Vol. 28, pp. 1-74   DOI   ScienceOn
7 Upatnieks, A., Driscoll, J. F., Rasmussen, C. C. and Ceccio, S. L., 2004, 'Liftoff of Turbulent Jet Flames-Assessment of Edge Flame and Other Concepts Using Cinema-PIV,' Combust. Flame, Vol. 138, pp. 259-272   DOI   ScienceOn
8 Metghalchi, M. and Keck, J.C., 1982, 'Burning Velocities of Mixtures of Air with Methanol, Isooctane, and Indolene at High Pressures and Temperatures,' Combust. Flame, Vol. 48, pp. 191-210   DOI   ScienceOn
9 Turns, S.R., 2000, 'An Introduction to Combustion-Second Eddition,' McGraw Hill, Nweyork, USA., p. 464
10 Wu, Y., Al-Rahbi, I.S., Lu, Y. and Kalghatgi, G. T., 2007, 'The Stability of Turbulent Hydrogen Jet Flames with Carbon Dioxide and Propane Addition,' Fuel, Vol. 86, pp. 1840-1848   DOI   ScienceOn
11 Lee, B.J., Kim, J.S. and Chung, S.H., 1994, 'Effect of Dilution on the Liftoff Oh Non-Premixed Jet Flames,' Proc. Combust. Inst., Vol. 25, pp. 1175-1181   DOI   ScienceOn
12 Jeongseog Oh, Munki Kim, Yeongil Choi and Youngbin Yoon, 2008, 'Study of Hydrogen Turbulent Non-premixed Flame Stabilization in Coaxial Air Flow,' Trans. of the KSME B, Vol. 32, No. 3, pp. 190-197   과학기술학회마을   DOI   ScienceOn
13 Lamoureux, N., Djebaili-Chaumeix, N. and Paillard, C.E., 2003, 'Laminar Flame Velocity Determination for $H_2-Air-He-CO_2$ Mixtures Using the Spherical Bomb Method,' Experimental Thermal and Fluid Science, Vol. 27, pp. 385-393   DOI   ScienceOn
14 Han, I. and Huh, K.Y., 2008, 'Roles of Displacement Speed on Evolution of Flame Surface Density for Different Turbulent Intensities and Lewis Numbers in Turbulent Premixed Combustion,' Combust. Flame, Vol. 152, pp. 194-205   DOI   ScienceOn
15 Pope, S.B., 2000, 'Turbulent Flows,' Cambridge University Press, p.188
16 Takahashi, F., Mizomoto, M., Ikai, S. and Futaki, N., 1984, 'Lifting Mechanism of Gree Jet Diffusion Flames,' Proc. Combust. Inst., Vol. 20, 295-302
17 Echekki, T. and Chen, J.H., 1999, 'Analysis of the Contribution of Curvature to Premixed Flame Propagation,' Combust. Flame, Vol. 118, pp. 308-311   DOI   ScienceOn
18 Kalghatgi, G. T., 1984, 'Liftoff Heights and Visible Flame Lengths of Vertical Turbulent Jet Diffusion Flames in Still Air,' Combust. Sci. Technol., Vol. 41, pp. 17-29   DOI
19 Muniz, L. and Mungal, M. G., 1997, 'Instantaneous Flame-Stabilization Velocities in Lifted-Jet Diffusion Flames,' Combust. Flame, Vol. 111, pp. 16-31   DOI   ScienceOn