Displacement Speeds in Turbulent Premixed Flame Simulations.

Day, M. S. ; Shepherd, I. G. ; Bell, J. ; Grcar, J. F. ; Lijewski, M. J.

Technical Information Center Oak Ridge Tennessee

关键词: Combustion;    Flames;    Velocity;    Turbulence;    Burning rate;   

RP-ID  :  DE2008932793

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The theory of turbulent premixed flames is based on a characterization of the flame as a discontinuous surface propagating through the fluid. The displacement speed, defined as the local speed of the flame front normal to itself, relative to the unburned fluid, provides one characterization of the burning velocity. In this paper, we introduce a geometric approach to computing displacement speed and discuss the efficacy of the displacement speed for characterizing a turbulent flame.