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CH4/NOx Reduced Mechanisms Used for Modeling Premixed Combustion

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DOI: 10.4236/epe.2012.44036    4,555 Downloads   7,610 Views   Citations

ABSTRACT

This study has identify useful reduced mechanisms that can be used in computational fluid dynamics (CFD) simulation of the flow field, combustion and emissions of gas turbine engine combustors. Reduced mechanisms lessen computational cost and possess the ability to accurately predict the overall flame structure, including gas temperature and species as CH4, CO and NOx. The S-STEP algorithm which based on computational singular perturbation method (CSP) is performed for reduced the detailed mechanism GRI-3.0. This algorithm required as input: the detailed mechanism, a numerical solution of the problem and the desired number of steps in the reduced mechanism. In this work, we present a 10-Step reduced mechanism obtained through S-STEP algorithm. The rate of each reaction in the reduced mechanism depends on all species, steady-state and non-steady state. The former are calculated from the solution of a system of steady-state algebraic relations with the point relaxation algorithm. Based on premixed code calculations, The numeric results which were obtained for 1 atm ≤ Pressure ≤ 30 atm and 1.4 ≤ ф ≤ 0.6 on the basis of the ten steps global mechanism, were compared with those computed on the basis of the detailed mechanism GRI-3.0. The 10-step reduced mechanism predicts with accuracy the similar results obtained by the full GRI-3.0 mechanism for both NOx and CH4 chemistry.

Cite this paper

A. Belcadi, M. Assou, E. Affad and E. Chatri, "CH4/NOx Reduced Mechanisms Used for Modeling Premixed Combustion," Energy and Power Engineering, Vol. 4 No. 4, 2012, pp. 264-273. doi: 10.4236/epe.2012.44036.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] E. F. Christos and B. Konstantinos, “Analysis and Reduction of the CH4-Air Mechanism at Lean Conditions”, Combustion Science and Technology, Vol. 159, 2000, pp. 281-303. doi:10.1080/00102200008935787
[2] S. H. Lam and D. A. Goussis, “Understanding Complex Chemical Kinetics with Computational Singular Perturbation,” 22nd Symposium on Combustion, The Combustion Institute, Pittsburgh, 1988, p. 931.
[3] S. H. Lam and D. A. Goussis, “Reduced Kinetic Mechanisms and Asymptotic Approximations for Methane-Air flames,” In: M. Smooke, Ed., Springer Lecture Notes 384, 1991, p. 227.
[4] U. Maas and S. B. Pope, “Implementation of Simplified Chemical Kinetics Based on Intrinsic Low-Dimensional Manifolds,” 24th Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, 1992, pp. 103-112.
[5] U. Maas and S. B. Pope, “Simplifying Chemical Kinetics: Intrinsic Low-Dimensional Manifolds in Composition Space,” Combustion and Flame, Vol. 88, No. 3-4, 1992, pp. 239-264. doi:10.1016/0010-2180(92)90034-M
[6] J. C. Keck, “Rate-Controlled Constrained Equilibrium Theory of Chemical Reactions in Complex Systems,” Progress in Energy and Combustion Science, Vol. 16, No. 2, 1990, pp. 125-154. doi:10.1016/0360-1285(90)90046-6
[7] T. Turanyi, “Parameterization of Reaction Mechanisms Using Orthogonal Polynomials,” Computational Chemistry, Vol. 18, 1994, pp. 45-54. doi:10.1016/0097-8485(94)80022-7
[8] J. A. Van Oijen and L. P. H. de Geoy, “Modelling of Premixed Laminar Flames Using Flamelet-Generated Manifolds,” Combustion Science and Technology, Vol. 161, 2000, pp. 113-137. doi:10.1080/00102200008935814
[9] M. R. Roussel and S. J. Fraser, “Geometry of the Steady-State Approximation, Perturbation and Accelerated Convergence Methods,” Journal of Physics Chemistry, Vol. 97, 1993, pp. 8316-8327. doi:10.1021/j100133a031
[10] M. D. Smooke, Eds., “Reduced Kinetic Mechanisms and Asymptotic Approximations for Methane-Air Flames,” Springer-Verlag, Berlin, 1991.
[11] N. Peters and B. Rogg, Eds., “Reduced Kinetic Mechanisms for Application in Combustion Systems,” Springer- Verlag, Berlin, 1993.
[12] A. Massias, D. Diamantis, E. Mastorakos and D. A. Goussis, “An Algorithm for the Construction of Global Reduced Mechanisms with CSP Data,” Combustion and Flame, Vol. 117, 1999, pp. 117-685. doi:10.1016/S0010-2180(98)00132-1
[13] G. Skevis, D. A. Goussis and E. Mastorakos, “Understanding Flame Kinetics from CSP Generated Reduced Mechanisms,” European Combustion Meeting, Paper 008, Orleans, 2003.
[14] C. Bowman, R. Hanson, D. Davidson, W. J. Gardiner, V. Lissianski, G. Smith, D. Golden, M. Frenklach and M. Goldenberrg, “GRI-3.0 Detailed Mechanism,” Berkeley, 2004. http//www.me.berkeley.edu/gri\_mech/
[15] A. Belcadi, E. Chatri, E. Affad and M. Assou, “7-Step Reduced Mechanism of the Detailed Mechanism GRI-3.0 by Using the CSP Method,” Physical and Chemical News, Vol. 31, 2006, pp. 61-69.
[16] R. J. Kee, J. F. Grcar, M. D. Smooke and J. A. Miller, “A Fortran Program for Modelling Steady Laminar One- Dimensional Premixed Flame,” Report, SAND85-8240. UC-401, Sandia Natinal Laboratories, New Mexico, 1992.
[17] R. J. Kee, F. M. Rupley and J. A. Miller, “CHEMKIN II: A Fortran Chemical Kinetics Package for the Analysis of Gas-Phase Chemical Kinetics,” Report, SAND85- 8240.UC-706, Sandia Natinal Laboratories, New Mexico, 1992.
[18] C. J. Sung, C. K. Law and J.-Y. Chen, “An Augmented Reduced Mechanism for Methane Oxidation with Comprehensive Global Parametric Validation,” Proceedings of the Combustion Institute Vol. 27, 1998, pp. 295-304.
[19] C. J. Sung, C. K. Law and J.-Y. Chen, “Further Validation of an Augmented Reduced Mechanism for Methane Oxidation: Comparison of Global Parameters and Detailed Structure,” Combustion Science and Technology, Vol. 156, 2000, pp. 201-220. doi:10.1080/00102200008947303
[20] C. J. Sung, C. K. Law and J.-Y. Chen, “Augmented Reduced Mechanism for NO Emission in Methane Oxidation,” Combustion and Flame, Vol. 125, 2001, pp. 906-919. doi:10.1016/S0010-2180(00)00248-0
[21] L. M. T. Somers and L. P. H. De Goey, “Analysis of a Systematical Reduction Technique,” 25th Symposium on Combustion, The Combustion Institute, Pittsburgh, 1994, p. 975. doi:10.1115/1.2818457

  
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