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Abstract
Size of recirculation zone and temperature field is examined in a swirl stabilized aero gas turbine combustor using computational fluid dynamics. A sector of 22.5° of an annular combustor is modeled for the study. Unstructured tetrahedral meshes comprising 1.2x106 elements are employed in the model where the governing equations are solved using CFD flow solver CFX. Grid sensitivity study and code validation through limited test data has also been carried out. The effect of pressure and fuel-air ratio on the size of recirculation zone and apparent size of flame zone has been studied at steady state conditions. The heat release rate due to combustion is found to affect the length of recirculation zone as well as the velocity field inside the combustion liner.
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References
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- Braig, W., Schulte, H. and Riegler, C., "Comparative Analysis of the Windmilling Performance of Turbo-jet and Turbofan Engines", Journal of Propulsion and Power, Vol.15, No.2, pp.326-333, March-April 1999.
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- Dimitri J. Mavriplis., "Unstructured Mesh Discretizations and Solvers for Computational Aerodynamics", 18th AIAA Computational Fluid Dynamics Conference, 25 - 28 June, 2007, Miami, FL, AIAA 2007-3955
- Li, L., Peng and Liu, T., "Combustion and Cooling Performance in Aero-engine Annular Combustor", Journal of Applied Thermal Engineering, 26, 2006, pp.1771-1779.
- Sasan Armand and Mei Chen., "A Combustion Study of Gas Turbines Using Multi-Species/Reacting Computational Fluid Dynamic", Proceedings of ASME Turbo Expo 2002, GT-2002-30105.
- Philip J Stopford., "CFD Modelling of Industrial Burners and Furnaces", 6th European Conference on Industrial Furnaces and Boilers, Sintra, Portugal, April, 2002.
- Yuriy I. Khavkin., "Theory and Practice of Swirl Atomizers", Taylor and Francis, 2003.
- Clayton T. Crowe., John D. Schwarzkopf., Martin, S. and Yutaka Tsuji., "Multiphase Flows With Droplets and Particles", CRC Press, 2011.
- Srinivasa Rao, M. and Sivaramakrishna, G., "Performance Improvement of an Aero Gas Turbine Combustor", GT2009-59928, 2009.
- Ascher H. Shapiro., "The dynamics and Thermodynamics of Compressible Fluid Flow", Vol.1, Ronald Press Co., 1953.
- Robert D. Zucker and Oscar Biblarz., "Fundamentals of Gas Dynamics", John Wiley and Sons, 2002.
- Lefebvre, A.H., "Gas Turbine Combustion", Taylor and Francis, 1998.
- Stohr, M., Boxx, I., Carter, C. and Meier, W., "Dynamics of Lean Blowout of a Swirl-Stabilized Flame in a Gas Turbine Model Combustor", Proceedings of the Combustion Institute, 33, 2011, pp.2953-2960.
References
Peter Garrison., "Why the Fire in a Perfectly Healthy Jet Engine Can Die", Air and Space Magazine, September 01, 2006.
Braig, W., Schulte, H. and Riegler, C., "Comparative Analysis of the Windmilling Performance of Turbo-jet and Turbofan Engines", Journal of Propulsion and Power, Vol.15, No.2, pp.326-333, March-April 1999.
Mishra, R. K., Gouda, G. and Vedaprakash, B. S., "Relight Envelope of a Military Gas Turbine Engine: An Experimental Study", GT2008-50256, Proceedings of ASME Turbo Expo 2008: Power for Land, Sea and Air, Turbo Expo 2008, June 9-13, 2008, Berlin, Germany.
Zukosky, E. E. and Marble, F. E., "The Role of Wake Transition in the Process of Flame Stabilization in the Bluff Bodies", AGARD Combustion Researches and Reviews, Butterworth Scientific Publishers, London, 1954, pp.167-180.
Ballal, D. R. and Lefebvre, A. H., "Weak Extinction Limits of Turbulent Flowing Mixtures", ASME Journal of Engineering, Vol.101, 1979, pp.343-348.
Dawes, W. N., Dhanasekaran, P. C., Demargne, A. A. J., Kellar, W. P. and Savill, A. M., "Reducing Bottlenecks in the CAD-to-Mesh-to-Solution Cycle Time to Allow CFD to Participate in Design", ASME Paper 2000-GT-0517, 2000.
Robert E. Melecki, et al., "Application of an Advanced CFD-based Analysis System to the PW6000 Combustor to Optimize Exit Temperature Distribution-Part 1", 2001-GT-0062, 2001.
Dimitri J. Mavriplis., "Unstructured Mesh Discretizations and Solvers for Computational Aerodynamics", 18th AIAA Computational Fluid Dynamics Conference, 25 - 28 June, 2007, Miami, FL, AIAA 2007-3955
Li, L., Peng and Liu, T., "Combustion and Cooling Performance in Aero-engine Annular Combustor", Journal of Applied Thermal Engineering, 26, 2006, pp.1771-1779.
Sasan Armand and Mei Chen., "A Combustion Study of Gas Turbines Using Multi-Species/Reacting Computational Fluid Dynamic", Proceedings of ASME Turbo Expo 2002, GT-2002-30105.
Philip J Stopford., "CFD Modelling of Industrial Burners and Furnaces", 6th European Conference on Industrial Furnaces and Boilers, Sintra, Portugal, April, 2002.
Yuriy I. Khavkin., "Theory and Practice of Swirl Atomizers", Taylor and Francis, 2003.
Clayton T. Crowe., John D. Schwarzkopf., Martin, S. and Yutaka Tsuji., "Multiphase Flows With Droplets and Particles", CRC Press, 2011.
Srinivasa Rao, M. and Sivaramakrishna, G., "Performance Improvement of an Aero Gas Turbine Combustor", GT2009-59928, 2009.
Ascher H. Shapiro., "The dynamics and Thermodynamics of Compressible Fluid Flow", Vol.1, Ronald Press Co., 1953.
Robert D. Zucker and Oscar Biblarz., "Fundamentals of Gas Dynamics", John Wiley and Sons, 2002.
Lefebvre, A.H., "Gas Turbine Combustion", Taylor and Francis, 1998.
Stohr, M., Boxx, I., Carter, C. and Meier, W., "Dynamics of Lean Blowout of a Swirl-Stabilized Flame in a Gas Turbine Model Combustor", Proceedings of the Combustion Institute, 33, 2011, pp.2953-2960.