This chapter will discuss turbulent premixed flames. The distinction between pre-mixed flames and nonpremixed flames is made clear by reviewing the ideal case of each. The ideal nonpremixed flame has fast (equilibrium) chemistry that rapidly adjusts to the local mixture fraction; the mixture fraction is constantly changing. The unburnt gas in an ideal premixed flame is completely mixed before chemistry begins. Then the ideal premixed flame has a delta function PDF for mixture fraction with chemistry that suddenly evolves from unburnt to burnt at the interface between re-actants and products; the interface propagates with a speed vL.
KeywordsFlame Front Mixture Fraction Premix Flame Turbulent Flame Laminar Flame
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