Development of a Three-Dimensional DNS Code for Study of Clean Agents -Two-Dimensional Simulation of Diluted Nonpremixed Counterflow Flames-

  • Park, Woe Chul (Department of Safety Engineering, Pukyong National University) ;
  • Hamins, A. (Building and Fire Research Laboratory, National Institute of Standards and Technology Gaithersburg)
  • Published : 2002.12.01

Abstract

A mixture fraction formulation is used to numerically simulate the structure of diluted axisymmetric methane-air nonpremixed counterflow flames. The effects of global strain rate and gravity wert! investigated and results were compared. Fuel of a mixture of 20% methane and 80% nitrogen by volume and oxidizer of pure air at low and moderate global strain rates $a_g= 20, 40, 80 s^{-1}$ in normal and zero gravity were computed. It is shown that the numerical method is capable of predicting the structure of counterflow flames in normal and microgravity environments at low and moderate global strain rates.

Keywords

References

  1. K. Maruta,, M. Yoshida, G H. Uo, Y. Ju and T. Niioka, 'Extinction of Low-Streched Diffusion Flame in Micro-gravity', Combustion and Flames, Vol. 112, pp. 181-187, 1998 https://doi.org/10.1016/S0010-2180(97)81766-X
  2. A. Hamins, M. Bundy, I. K. Puri., K.B. McGrattan and W.C. Park, 'Suppression of Low Strain Rate Nonpre-mixed Flames by an Agent', Proc. 6$^{th}$ Intl Microgravity Combustion Workshop, pp. 101-103, 2001
  3. B. Rogg, 'A Computer Program for the Simulation of One-Dimensional Chemically Reacting Flows', Techni-cal Report CUED/A-THERM0/TR39, Univ. of Cam-bridge, Dept. of Eng., 1991
  4. A., Lutz, R.J. Kee, J. Grcar and F.M. Rupley, 'A Fortran Program Computing Opposed Flow Diffusion Flames', SAND96-8243, Sandia National Laboratories, Liver-more, CA, 1997
  5. K.B. McGrattan, H.R. Baum, R.G. Rehm, A. Hamins, G.P. Fomey, J.E. Floyd, S. Hostikka, 'Fire Dynamics Simulator Technical Reference Guide', v.2, National Institute of Standards and Technology, Gaithersburg, MD, 2001 (see http://fire.nist.gov/fds)
  6. J.E. Floyd, K.B. McGrattan and H.R. Baum, 'A Mixture fraction Combustion Model for Fire Simulation Using CFD', Proc. Intl Conf. on Engineered Fire Protection Design, pp. 279-290, 2001
  7. K. Seshadri and F.A. Williams, 'Laminar Flow Be-tween Parallel Plates with Injection of a Reactant at High Rey-nolds Number', Intl J. Heat Mass Transfer, Vol. 21, pp. 251-253, 1978 https://doi.org/10.1016/0017-9310(78)90230-2