Diffusion Flames Based on a Laminar Spray Flame Library

Abstract The present paper investigates the structure of turbulent spray diffusion flames by means of numerical simulations. The flamelet model for turbulent diffusion flames has recently been extended to turbulent spray diffusion flames. The model is suitable for considering detailed chemical reactions through use of a laminar flame library consisting of structures of laminar gas diffusion flamelets that are characterized by the mixture fraction and its scalar dissipation rate. The focus of the present paper is the implementation of laminar spray diffusion flames for use in turbulent flame computations. Since the structure of laminar spray flames is considerably different from that of their gaseous counterparts, new criteria need to be developed for the implementation of these structures. The present paper presents characteristics of laminar spray flames and their consideration in turbulent flame computations. Both the model predictions (using either laminar gas flames or laminar spray flames) are compar...