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Comparison of Premixed Turbulent Burning Velocity Models Taking Account of Turbulence and Flame Spatial Scales
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Abstract
Conventionally, turbulent burning velocity models are compared by showing the model-predicted ST/SL0 ratios in an ST/SL0 - u′/SL0 plane, where ST and SL0 are the turbulent and laminar burning velocities, respectively, with u′ being the turbulence intensity. Such a method applies to only those models which take u′ or u′/SL0 as the only variable of ST or of ST/SL0.
In order to analyze and compare most recent models in which turbulence and flame spatial scales (or length scales) are also taken into account because of their importance in combustion, this paper showed the model-predicted ST/SL0 ratios as contours in three planes (Re-Da, ηκ/η0 - u′/SL0 and L/η0 - u′/SL0, where Re, Da, L, ηκ and η0 are the Reynolds number, Damköhler number, turbulence integral scale, Kolmogorov scale and laminar flame preheat zone thickness, respectively); these planes are usually used in discussing the flame structure. The obtained planes showing contours of the model-predicted ST/SL0 ratios were referred to as burning velocity diagrams of the models. As a burning velocity diagram shows not only detailed ST/SL0 ratios under different u′/SL0 ratios but also those under different ratios of L/η0, as well as the overall characteristics of the model (such as the flame quenching limit, etc.) at the same time, it gives a thorough representation of the model. Therefore, comparison of different models on the basis of their respective burning velocity diagrams can take account of the influences of turbulence and flame spatial scales in addition to the influences of the u′/SL0 ratios. Five models proposed by different authors were shown as diagrams respectively. Based on the diagrams obtained and with an emphasis put on a model proposed by the authors previously, these models were discussed and compared with recent experimental results on (1) ST/SL0 ratios under the same turbulence characteristics and the same mixture properties; (2) flame quenching limit and; (3) relation between turbulent burning velocity and flame structure.
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Kido, H. and Huang, S., "Comparison of Premixed Turbulent Burning Velocity Models Taking Account of Turbulence and Flame Spatial Scales," SAE Technical Paper 930218, 1993, https://doi.org/10.4271/930218.Also In
References
- Bray, K.N.C. “Turbulent Flows with Premixed Reactants in Turbulent Reacting Flows,” Topics in Applied Physics Libby, P.A. Williams, F.A. 44 115 Springer 1980
- Borghi, R. “On the Structure and Morphology of Turbulent Premixed Flames,” Recent Advances in Aerospace Science Bruno, C. Casci, C. 117 Plenum 1985
- Borghi, R. “Turbulent Combustion Modeling,” Prog. Energy Combust. Sci. 14 245 1988
- Abraham, J. Williams, F.A. Bracco, F.V. “A Discussion of Turbulent Flame Structure in Premixed Charges,” SAE Paper, No. 850345 1985
- Williams, F.A. Combustion Theory 2nd 412 The Benjamin/Cummings 1985
- Peters, N. “Length and Time Scales in Turbulent Combustion,” Turbulent Reactive Flows Borghi, R. Murthy, S.N.B. 242 Springer-Verlag 1989
- Kido, H. Huang, S. Nakashima, K. “A Premixed Turbulent Flame Structure Model Having Reactant Islands and Fractal Flame Surfaces (Formulation and Test of the Model),” JSME Int. J., Ser.II 34 509 1991
- Gouldin, F.C. “An Application of Fractals to Modeling Premixed Turbulent Flames,” Combust. Flame 68 249 1987
- Tennekes, H. Lumley, J.L. A First Course in Turbulence 20 MIT Press 1972
- Abdel-Gayed, R.C. Al-Khishali, K.J. Bradley, D. “Turbulent Burning Velocity and Flame Straining in Explosions,” Proc. R. Soc. Lond. A391 393 1984
- Kido, H. Wakuri, Y. Murase, E. “Measurements of Spatial Scales and a Model for Small-Scale Structure of Turbulence in an Internal Combustion Engine,” Proc. ASME-JSME Thermal Engrg. Joint Conf. 4 191 1983
- Kido, H. Huang, S. Nakashima, K. “A Study on the Structure of Premixed Turbulent Propagating Flames (An Investigation and Application of the Flame Plasma Potential Signal),” JSME Int. J., Ser. II 34 78 1991
- Abdel-Gayed, R.G. Bradley, D. Lung, F. K.-K. “Combustion Regimes and the Straining of Turbulent Premixed Flames,” Combust. Flame 76 213 1989
- Ballal, D.R. Lefebvre, A.H. “The Structure and Propagation of Turbulent Flames,” Proc. R. Soc. Lond., A344 217 1975
- Libby, P.A. Bray, K.N.C. Moss, J.B. “Effects of Finite Reaction Rate and Molecular Transport in Premixed Turbulent Combustion,” Combust. Flame 34 285 1979
- Kido, H. Kitagawa, T. Nakashima, K. Kim, J. “Refinement of the Spectral Model of Turbulent Burning Velocity (In Case of Stoichiometric Mixture),” JSME Int. J., Ser.II 35 3 421 1992
- Kuo, K.K. Principles of Combustion 409 John Wiley & Sons, Inc. 1986