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The paper investigates influence of homogenous phase reaction mechanism on results of simulations of tangentially fired pulverised coal combustion chamber equipped with low-emission RI-JET2 burners. Global mechanisms of Hautmann[2], Jones and Lindstedt [3] were investigated. Mechanisms have been implemented into two turbulent gas phase combustion models: - Eddy Break-Up and Eddy Dissipation Concept. CO level in the chamber was examined. The results indicate large influence of combustion model choice on the CO level. In case of boiler with rapid ignition burners EDC model is probably more accurate than EBU - very popular in boilers with jest burners. Results of the global mechanisms investigation suggest a necessity to implement reduced mechanisms into combustion model.
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46--52
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autor
- Politechnika Wrocławska, Instytut Techniki Cieplnej i Mechaniki Płynów, Zakład Termodynamiki
Bibliografia
- [1] BRINK A. i inni Possibilities and Limitations of the Eddy Break-Up Model. W: Combustion and Flame 2000, 123: 275-279.
- [2] HAUTMANN D.J. i inni., A Multiple-Step Overall Kinetic Mechanism for the Oxidation of Hydrocarbons. W: Combustion Sciences and Technology, 1981, 25, 219-249.
- [3] JONES W.P. I LINDSTEDT, R.P. Global reaction schemes for hydrocarbon combustion. W: Combustion and Flame, 1988,73, 233-249.
- [4] LIBBY P.A., WILLIAMS F.A., Turbulent Reacting Flows. W: Topics in Applied Physics. Springer Verlag 1980,44.
- [5] MAGEL H.C. i inni Simulation of Detailed Chemistry in Turbulent Combustor Flow. W: 26th Symp. (Int'l.) on Combustion. The Combustion Institute, 1996, 67-74.
- [6] MAGNUSSEN B. F., B. H. HJERTAGER. On mathematical models of turbulent combustion with special emphasis on soot formation and combustion. W: 17th Symp. (Int'l.) on Combustion. The Combustion Institute, 1976, 719-729.
- [7] MAGNUSSEN B. F., On the Structure of Turbulence and a Generalised Eddy Dissipation Concept for Chemical Reaction in Turbulent Flow. Nineteenth AIAA Meeting, St. Louis, 1981.
- [8] MCBRIDE B.J i inni Coefficients for Calculating Thermodynamic and Transport Properties for Individual Species, NASA Technical Memorandum 1993.
- [9] Reaction Design, Theory Manual, Chemkin Software, 2004, 29-30.
- [10] RUCKERT F.U. i inni Comparison of different global reaction mechanisms for coal-fired utility boilers. W: Progress in Computational Fluid Dynamics, 2003,1.3,130-139.
- [11] SPALDING D. B., Mixing and chemical reaction in steady confined turbulent flames. W: 13th Symp. (Int'l.) on Combustion. The Combustion Institute, 1971, 649-657.
- [12] WESTBROOK CK. I DRYER F.L., Chemical Kinetic Modeling of Hydrocarbon Combustion. W: Progress in Energy Combustion Science, 1984,10,1.
- [13] GNUTEK Z., MODLIŃSKI N., Modelowanie komory paleniskowej kotła palnikami HT-NR. W: Termodynamika w nauce i gospodarce, Oficyna Wydawnicza Politechniki Wrocławskiej, 2008, 311-317.
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Bibliografia
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