Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Prediction of Laminar Flame Thickness of Ethanol-Air Pre-Mixture

에탄올-공기 예혼합기의 층류 화염두께 예측

  • Published : 2004.11.01
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Abstract

The thickness of laminar flame and preheat zone was computed from equation with burning velocity and the temperature profile, which is obtained by using premix code of Chemkin program for ethanol-air mixture. The computations were carried out under the unburned gas pressure 0.5bar-30bar and temperature of 300k-700K at 1.0. A difference flame thickness showed between temperature profile and equation with burning velocity. The ratio of flame thickness derived from the equation was about 45∼65% of the temperature profile, and the thickness of preheat zone was about 67.1% of the flame thickness. The flame thickness was decreased by increasing the pressure and temperature, but the effect of pressure is more significant than the effect of temperature on the flame thickness. The flame thickness was predicted by using the following equation. X(mm) = $X_{st}$ (T/300)$^{-0}$.65/(P)$^{-0}$.68/ (0.5bar$\leq$P$\leq$30bar, 300K$\leq$T$\leq$700K)K)

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References

  1. Rallis, C. J.and Garforth, A. M., 1980, 'The Determination of Laminar Burning Velocity,' Progress in Energy and Combustion Science, Vol. 6, pp. 303-329 https://doi.org/10.1016/0360-1285(80)90008-8
  2. Turns, R. S., 2000, An Introduction to Combustion (2nd Edition), McGraw-Hill, pp. 254-288
  3. Andrew, G. E. and Bradely, D., 1972, 'The Burning Velocity of Methane-Air Mixtures,' Combustion and Flame, Vol. 19, No. 275, Vol. 275-288 https://doi.org/10.1016/S0010-2180(72)80218-9
  4. Gottgen, J., Mauss, F. and Peter, N., 1992, 'Analytic Approximations of Burning Velocities and Flame Thickness of Lean Hydrogen, Methane, Ethylene, Ethane, Acetylene and Propane Flames,' Twenty-fourth Symposium (international) on Combustion, The Combustion Institute, pp. 129-135
  5. Kwon, S. I. and Bowen, J. P., 2003, 'Prediction of Laminar Burning Velocity and Flame Thickness in Methane-Air Pre-Mixture,' Transactions of the Korean Society of Mechanical Engineers(B), Vol. 27, No.9, pp. 1201-1208 https://doi.org/10.3795/KSME-B.2003.27.9.1201
  6. Guider, O., 1982, 'Laminar Burning Velocity of Methanol, Ethanol and Iso-Octane-Air Mixtures,' Nineteenth Symposium (international) on Combustion, The Combustion Institute, pp. 275-281
  7. Sun, C. J., Sung, C. J., He, L. and Law, C. K., 1995, 'Dynamics of Weakly Stretched Flames: Quantitative Description and Extraction of Global Flame Parameters,' Combustion and Flame, Vol. 118, No. 108, pp. 108-128 https://doi.org/10.1016/S0010-2180(98)00137-0
  8. Glassman, I., 1996, Combustion (3rd Edition), Academic Press. pp. 119-219
  9. Marinov, N. M., 1998, 'A Detailed Chemical Kinetic Model for High Temperature Ethanol Oxidation,' International Chemical Kinetics, UCRL-JC-131657
  10. Metghalchi, M. and Keck, J. C., 1980, 'Laminar Burning Velocity of Propane-Air Mixture at High Temperature and Pressure,' Combustion and Flame, Vol. 38, No. 143, pp. 143-153 https://doi.org/10.1016/0010-2180(80)90046-2