Combustion of Liquid Fuels in a Porous Radiant Burner

Abstract The combustion of a liquid fuel within a highly porous inert medium (PIM) has been investigated numerically and experimentally A one-dimensional laminar flow model is used in this work. Combustion is modeled using a multistep reaction mechanism. Non-local thermal equilibrium between the gas, the liquid, and the solid phases is accounted for by considering separate energy equations for the three phases. Nongray solid radiation and droplet radiation absorption are included in the model. The equations for the liquid phase are formulated using a Lagrangian description and the equations for the gas and solid phases are formulated using an Eulerian description. A burner that allows effective control of the equivalence ratio and the burning rate is built to study the phenomena. Burning rates, temperature, and emissions are measured Numerical results are obtained for droplet size and temperature history as well as flame speed and temperature profile within the burner. Effects of various parameters on the...

[1]  W. Fiveland.  Discrete-Ordinates Solutions of the Radiative Transport Equation for Rectangular Enclosures , 1984 .

[2]  Matthew J. Hall,et al.  The combustion of liquid fuels within a porous media radiant burner , 1995 .

[3]  Yoshizawa Yoshio,et al.  Analytical study of the structure of radiation controlled flame , 1988 .

[4]  S. Churchill,et al.  A model for combustion of gaseous and liquid fuels in a refractory tube , 1979 .

[5]  Craig T. Bowman,et al.  Control of combustion-generated nitrogen oxide emissions: Technology driven by regulation , 1992 .

[6]  Felix Jiri Weinberg,et al.  Advanced combustion methods , 1986 .

[7]  Robert J. Moffat,et al.  Describing the Uncertainties in Experimental Results , 1988 .

[8]  S. Churchill,et al.  The stability of flames inside a refractory tube , 1984 .

[9]  Tadao Takeno,et al.  An Excess Enthalpy Flame Theory , 1979 .

[10]  J. Howell,et al.  Experimental and Numerical Study of Premixed Combustion Within Nonhomogeneous Porous Ceramics , 1993 .

[11]  R. J. Kee,et al.  Chemkin-II : A Fortran Chemical Kinetics Package for the Analysis of Gas Phase Chemical Kinetics , 1991 .

[12]  R. Peck,et al.  Flame Stabilization and Multimode Heat Transfer in Inert Porous Media: A Numerical Study , 1990 .

[13]  Robert J. Kee,et al.  A FORTRAN COMPUTER CODE PACKAGE FOR THE EVALUATION OF GAS-PHASE, MULTICOMPONENT TRANSPORT PROPERTIES , 1986 .

[14]  R. Viskanta,et al.  Experimental determination of the volumetric heat transfer coefficient between stream of air and ceramic foam , 1993 .

[15]  T. Tomimura,et al.  ANALYTICAL AND EXPERIMENTAL STUDIES ON RADIATIVE PROPAGATION IN POROUS MEDIA WITH INTERNAL HEAT GENERATION. , 1986 .