Browse > Article

Computation of a Low Strain Rate Counterflow Flame in Normal and Zero Gravity  

Woe-Chul Park (Department of Safety Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Safety / v.17, no.3, 2002 , pp. 107-111 More about this Journal
Abstract
A near extinction nonpremixed counterflow flame of 19% methane diluted by 81% nitrogen by volume and undiluted air at a low global strain rate, 20 s-1, was computed. Investigations were focused on effects of the duct thickness and velocity boundary conditions on the flame structure in normal and zero gravity conditions. The results showed that, under normal gravity conditions, the effects of the duct thickness and velocity boundary conditions were significant by shifting the flame position, but negligible in zero gravity. The differences in flame structure were caused by buoyancy, and hence should be considered in the measurements in normal gravity.
Keywords
numerical simulations; air-methane counterflow flame; duct thickness; velocity boundary conditions; flame structure; zerogravity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 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
2 K. Maruta, M. Yoshida, H. Guo, Y. Ju and T. Niioka, 'Extinction of Low-Stretched Diffusion Flame in Microgravity,' Combustion and Flames, Vol. 112, pp. 181-187, 1998   DOI   ScienceOn
3 K. Seshadri and F. A. Williams, 'Laminar Flow Between Parallel Plates with Injection of a Reactant at High Reynolds Number,' Int'l J. Heat Mass Transfer, Vol. 21, pp. 251-253, 1978   DOI   ScienceOn
4 W. C. Park, 'An Evaluation of a Direct Numerical Simulation for Counterflow Diffusion Flames,' J. of Korea Institute of Industrial Safety, Vol. 16, No. 4, pp. 74-81, 2001(in Korean)
5 K. B. McGrattan, H. R. Baum, R. G. Rehm, A. Hamins, G. P. Forney, J. E. Floyd and S. Hostikka, Fire Dynamics Simulator Technical Reference Guide V.2, National Institute of Standards and Technology, Gaithersburg, MD, U.S.A., 2001(a1so http://fire.nist.gov/fds/)
6 A. Lutz, R. J. Kee, J. Grcar and F. M. Rupley, 'A Fortran Program Computing Opposed Flow Diffu sion Flames' SAND96-8243, Sandia National Laboratories, Livermore, CA, 1997
7 W. C. Park and A. Hamins, 'Investigation of Velocity Boundary Conditions in Counterflow Flames,' KSME Int'l J. Vol. 16, No. 2, pp. 262-269, 2002   DOI