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Abstrakty
In Direct or Semi-Direct Numerical Simulations of turbulent reacting flows the exploitation of complex, realistic and detailed chemistry and transport models often results in prohibitive memory and CPU requirements when flows of practical relevance are treated. The integrated Combustion Chemistry approach has recently been put forward as a methodology suitable for the integration of complex chemical kinetic and chemistry effects into large scale computational procedures for the calculation of complex and practical reacting flow configurations. Through this procedure a reduced chemical kinetic scheme involving only a limited number of species and reactions is derived from a detailed chemical mechanism so as to include major species and pollutants of interest in the main flow calculation. The chemical parameters employed in this integrated scheme i.e. rates, constants, exponents are then calibrated on the basis of a number of constraints and by comparing computations over a range of carefully selected laminar flames so as to match a number of prespecified flame properties such as adiabatic temperatures, selected target species profiles, flame speeds, extinction characteristics. The present work describes such an effort for a commonly used fuel of both fundamental and practical importance, methane. The proposed nine-step scheme involves nine major stable species and in addition to the basic methane oxidation model also includes NOx production and soot formation submodels.
Rocznik
Tom
Strony
17--30
Opis fizyczny
Bibliogr. 18 poz., rys., tab., wykr.
Twórcy
autor
- University of Patras, Department of Mechanical and Aeronautical Engineering, Patras, Rio 26500, Greece
autor
- University of Patras, Department of Mechanical and Aeronautical Engineering, Patras, Rio 26500, Greece
Bibliografia
- [1] P.A. Libby and F.A. Williams. Turbulent Reacting Flows, Abacus Press, New York, 1993.
- [2] D. Haworth, B. Cuenot, T. Poinsot and R. Blint. Numerical simulation of turbulent propane-air combustion with non-homogeneous reactants. Combustion and Flame. 121; 395-422, 2000.
- [3] T. Plessing, P. Terhoeven, N. Peters and M.S. Mansour. An experimental and numerical study of a laminar triple flame. Combustion and Flame. 115: 335-353, 1998.
- [4] P. Koutmos, C. Mavridis and D. Papailiou. A study of turbulent diffusion flames formed by planar fuel injection into the wake formation region of a slender square cylinder. Proc. Combust. Inst. 26: 161-168, 1996.
- [5] W.K. Bushe and R.W. Bilger. Direct numerical simulation of turbulent non-premixed combustion with realistic chemistry. Annual Research Briefs, Center for Turbulence Research, NASA Ames/Stanford University; 3-22, 1998.
- [6] N. Peters and F.A. Williams. The asymptotic structure of stoichiometric methane-air flames, Combustition and Flame 68: 185-197, 1987.
- [7] U. Mass and S.B. Pope. Simplifying chemical kinetics: Intrinsic low-dimensional manifolds in composition space. Combustion and Flame 88: 239-264, 1992.
- [8] B. Bedat, F.N Egolfopoulos and T. Poinsot. Direct Numerical Simulations of heat release and NOx formation in turbulent non-premixed flames. Combustion and Flame. 119: 69-83, 1999.
- [9] M.D. Smooke, CS. McEnally, L.D. Pfefferle, R.J. Hall and M.B. Colket. Computational and experimental study of soot formation in a coflow, laminar diffusion flame. Combustion and Flame. 117: 117-139, 1999.
- [10] P.R. Lindstedt. Simplified soot nucleation and surface growth steps for non-premixed flames. In: H. Bockhorn, ed., Soot Formation in Combustion, 417-429, Springer Verlag, Heidelberg, 1994.
- [11] V.R. Katta, L.P. Goss and W.M. Roquemore. Effect of nonunity Lewis number and finite-rate chemistry on the dynamics of a hydrogen-air jet diffusion flame. Combustion and Flame. 96: 60-74, 1994.
- [12] R.J. Kee, J.F. Grcar, M.D. Smooke and J.A. Miller. A Fortran program for modelling steady laminar one- dimensional premixed flames. Sandia National Laboratories, Livenmore, C.A., 1985.
- [13] H. Tsuji and I. Yamaoka. Structure analysis of counterflow diffusion flames in the forward stagnation region of a porous cylinder. Proc. Combust. Inst. 13: 723-730, 1971.
- [14] F.N. Egolfopoulos and CS. Campbell. Unsteady counterflowing strained diffusion flames: diffusion-limited frequency response. Journal of Fluid Mechanics. 318: 1-29, 1996.
- [15] J. Kim, J. Gore and R Viskanta. A study of the effects of air preheat on the structure of methane/air counterflow diffusion flames. Combustion and Flame. 121: 262-274, 2000.
- [16] M.D. Smooke, A. Ern, M.A. Tanoff, B.A. Valdati, D.F. Mohamed, D.F. Marran and M.B. Long. Computational and experimental study of NO in an axisymmetric laminar diffusion flame. Proc. Combust. Inst. 26: 2161-2170, 1996.
- [17] C.S. McEnally, L.D. Pfefferle, A.M. Schaffer, M.B. Long, R.K. Mohammed, M.D. Smooke and M.B. Colket. Characterization of a coflowing methane/air non-premixed flame with computer modeling, Rayleigh-Raman imaging and on-line mass spectroscopy. Proc. Combust. Inst. 28: 2063-2070, 2000.
- [18] W.H. Green and D.A. Schwer. Adaptive chemistry. Computational Fluid and Solid Mechanics 32: 1209-1211, 2001.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPB1-0013-0009