THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Mohammed Alhumairi

,

Özgür Ertunç

ACTIVE-GRID TURBULENCE EFFECT ON THE TOPOLOGY AND THE FLAME LOCATION OF A LEAN PREMIXED COMBUSTION

ABSTRACT
Lean premixed combustion under the influence of active-grid turbulence was computationally investigated, and the results were compared with experimental data. The experiments were carried out to generate a premixed flame at a thermal load of 9 kW from a single jet flow combustor. Turbulent combustion models, such as the coherent flame model (CFM) and turbulent flame speed closure (TFC) model were implemented for the simulations performed under different turbulent flow conditions, which were specified by the Reynolds number based on Taylor’s microscale (Reλ), the dissipation rate of turbulence (ε) and turbulent kinetic energy (k). This study shows that the applied turbulent combustion models differently predict the flame topology and location. However, similar to the experiments, simulations with both models revealed that the flame moves toward the inlet when turbulence becomes strong at the inlet, that is, when Reλ at the inlet increases. The results indicated that the flame topology and location in the coherent flame model were more sensitive to turbulence than those in the turbulent flame speed closure model. The flame location behavior on the jet flow combustor significantly changed with the increase of Reλ.
KEYWORDS
lean premixed combustion, active-grid turbulence, flame location
PAPER SUBMITTED: 2017-05-03
PAPER REVISED: 2018-01-05
PAPER ACCEPTED: 2018-03-20
PUBLISHED ONLINE: 2018-04-28
DOI REFERENCE: https://doi.org/10.2298/TSCI170503100A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 6, PAGES [2425 - 2438]
REFERENCES
  1. Sponfeldner, T., Soulopoulos, N. , Beyrau, F., Hardalupas, Y. , Taylor, A.,Vassilicos, J.,The Structure of Turbulent Flames in Fractal- and Regular-grid-generated Turbulence, Combust. Flame, 162(2015), 9, pp. 3379-3393.
  2. Mydlarski, L.,Warhaft, Z.,On the Onset of High-Reynolds-Number Grid-Generated Wind Tunnel Turbulence, J. Fluid Mech.,320(1996),1,pp.331-368.
  3. N. Soulopoulos ,Kerl, J., Sponfeldner, T., Beyrau, F., Hardalupas, Y.,Taylor, A.,Vassilicos, J., Turbulent Premixed Flames On Fractal-grid-generated Turbulence, Fluid Dyn. Res., 45(2013),6,pp. 1-18.
  4. Goh, K.,Geipel, P., Lindstedt, R. P., Lean Premixed Opposed Jet Flames in Fractal Grid Generated Multiscale Turbulence, Combust. Flame,161(2014), 9, pp. 2419-2434.
  5. Gülder, Ö. L. ,Yuen, F. T. C. , Turbulent Premixed Flame Front Dynamics and Implications for Limits of Flamelet Hypothesis, Proc. Combust. Inst., 34(2013), pp. 1393-1400.
  6. Özdemir, I.B, Use of Computational Combustion in The Development and Design of Energy-Efficient Household Cooker-Top Burners, J. Energy Resour. Technol. ASME, 139(2016),2, pp. 22206-8.
  7. Muppala, F. D. S., Manickam, B. , A Comparative Study of The Different Reaction Models for Turbulent Methane-hydrogen-air, J. Therm. Eng.,1(2015),1, pp. 367-380.
  8. Pope, S. B. , Turbulent Flows, Cambridge Univ. Press, Cambridge , UK, 2000.
  9. Wu, M. S. , Kwon, S. , Driscoll, J. F. ,Faeth, G. M. , Preferential Diffusion Effects on The Surface Structure of Turbulent Premixed Hydrogen/air Flames, Combust. Sci. Technol.,78(1991), February, pp. 69-96.
  10. Yilmaz, B., Özdoğan, S. Gökalp, I. , Numerical Study of Turbulent Lean Premixed Methane-Air Flames, Fuels Combust. Eng. J.,1(2015), pp. 26-33.
  11. Manickam, B. ,Muppala, S. P., Franke, J. , Dinkelacker, F. , Numerical Simulation of Rod Stabilized Flames, V Eur. Conf. Comput. Fluid Dyn. Eccomas CFD, (2010),June, pp. 14-17.
  12. Nikolaou, Z. M. , Swaminathan, N. , Heat Release Rate Markers for Premixed Combustion, Combust. Flame, 161(2014),12, pp. 3073-3084.
  13. Schmid, H. , Habisreuther, P. , Leuckel, W., A Model for Calculating Heat Release in Premixed Turbulent Flames, Combust. and Flame, 113(1998),97, pp. 79-91.
  14. Amico, M. E, CFD Simulation of a Burner For Syngas Characterization: Preliminary Results and Experimental Validation, 18th Eur. Biomass Conf. Exhib., 3000(2010),May, pp. 3-7.
  15. Kanniche,M., Zurbach,S., Coherent Flame Model for Turbulent Combustion Operatıng With Both Premixed And Non-Premixed Flames, ASME Journal, Present. Int. Gas Turbine Aeroengine Congr. Expo., 95(1995), 95-GT-168.
  16. Law, C. K., combustion physics. Cambridge Univ. Press, Cambridge , UK, 2006.
  17. Tamadonfar, P. , Gülder, Ö. L. , Effects of Mixture Composition and Turbulence Intensity on Flame Front Structure and Burning Velocities of Premixed Turbulent Hydrocarbon/air Bunsen Flames, Combust. Flame, 162(2015),12, pp. 4417-4441.
  18. Hartung, G. , Hult, J. , Kaminski, C. F. , Rogerson, J. W., Swaminathan, N. , Effect of Heat Release on Turbulence and Scalar-turbulence Interaction in Premixed Combustion, Phys. Fluids, 20(2008),3, pp. 1-17.
  19. Mazellier, N. ,Danaila, L. , Renou, B., Multi-Scale Turbulence Injector: A New Tool to Generate Intense Homogeneous and Isotropic Turbulence for Premixed Combustion, J. Turbul.,11(2010),2, pp. 1-30.
  20. Swaminathan, N. , Bray, K. N. C., Turbulent premixed flames, Cambridge Univ. Press, Cambridge, UK, 2011.
  21. Gülder, Ö. L. , Smallwood, G. J., Flame Surface Densities in Premixed Combustion at Medium to High Turbulence Intensities, Combust. Sci. Technol.,179(2007),1, pp. 191-206.
  22. CD-adapcoTM, CD-adapco, STAR CCM+ Documentation and User Guide, Version 11.02.009-R8. Melville, USA, 2016.
  23. Meneveau, C. , Poinsot, T. ,Stretching and Quenching of Flamelets in Turbulent Premixed Combustion, Combust. Flame, 86(1991), pp. 311-332.
  24. Alhumairi, M. , Ertunc, Ö. , The Calibration of Turbulent Flame Speed Closure Model to Predict The Premixed Combustion Flame Under The Influence of Weak to Strong Turbulence, Int. conf. energy therm. eng. Istanbul 2017 25-28 April 2017, yildiz tech. univ. Istanbul, Turkey, April, pp. 1-7.
  25. Kuo, K. K. ,Acharya, R. , Fundamentals of Turbulent and Multi-Phase Combustion, John Wiley & Sons, Inc., Hoboken, New Jersey, USA, 2012.
  26. Yuen, F. T. , Gülder, Ö. L. , Investigation of Dynamics of Lean Turbulent Premixed Flames by Rayleigh Scattering, AIAA J., 47(2009),12, pp. 2964-2973.
  27. Zimont, V. , An Efficient Computational Model for Premixed Turbulent Combustion at High Reynolds Numbers Based on a Turbulent Flame Speed Closure, J. Eng. Gas Turbines Power, 120 (1998),3, 97-GT-S95.
  28. Shih, T. H. , Liou, W. W., Shabbir, A. ,Yang, Z. ,Zhu, J., A New K-epsilon Eddy Viscosity Model for High Reynolds Number Turbulent Flows: Model Development And Validation, Comput. Fluids, 24(1995), August, pp. 227-238.
  29. Kheirkhah , S. ,Gülder, L., Topology and Brush Thickness of Turbulent Premixed V-shaped Flames, Flow, Turbul. Combust., 93(2014), 3, pp. 439-459.
  30. Salusbury, S. D. , Experiments in Laminar and Turbulent Premixed Counter-flow Flames at Variable Lewis Number, Ph.D. thesis, McGill University ,Montreal, Canada 2014.
PDF VERSION [DOWNLOAD]
Active-grid turbulence effect on the topology and the flame location of a lean premixed combustion

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence