An algorithm for LES of premixed compressible flows using the Conditional Moment Closure model

JOURNAL OF COMPUTATIONAL PHYSICS

卷:230

Article

Thornber, B.^1,2  Bilger, R. W.²  Masri, A. R.²  Hawkes, E. R.³ 

[1] Cranfield Univ, Dept Aerosp Sci, Fluid Mech & Computat Sci Grp, Cranfield MK43 0AL, Beds, England

[2] Univ Sydney, Sch Aerospace Mech & Mechatron Engn, Sydney, NSW 2006, Australia

[3] Univ New S Wales, Sch Mech & Mfg Engn, Sch Photovolta & Renewable Energy, Sydney, NSW 2052, Australia

关键词: Conditional Moment Closure;    Large Eddy Simulation;    Compressible;    Combustion;    Premixed;    Turbulent combustion;    Non-premixed;   

DOI  :  10.1016/j.jcp.2011.06.024

来源: Elsevier

【 摘 要 】

A novel numerical method has been developed to couple a recent high order accurate fully compressible upwind method with the Conditional Moment Closure combustion model. The governing equations, turbulence modelling and numerical methods are presented in full. The new numerical method is validated against direct numerical simulation (DNS) data for a lean premixed methane slot burner. Although the modelling approaches are based on non-premixed flames and hence not expected to be valid for a wide range of premixed flames, the predicted flame is just 10% longer than that in the DNS and excellent agreement of mean mass fractions, conditional mass fractions and temperature is demonstrated. This new numerical method provides a very useful framework for future application of CMC to premixed as well as non-premixed combustion. (C) 2011 Elsevier Inc. All rights reserved.

【 授权许可】

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