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Application of G-equation to large eddy simulation of turbulent premixed flame around a bluff body inside a cylindrical chamber  

Choi Chang-Yong (전주대학교 기계공학과)
Park Nam-Seob (현대기아 연구개발본부)
Ko Sang-Cheol (전주대학교 기계공학과)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.29, no.4, 2005 , pp. 391-398 More about this Journal
Abstract
In this investigation, turbulent premixed combustion and flame front propagation in a gas turbine combustion chamber is studied. Direct numerical simulation of turbulent reacting flows demands extremely high computational resources, especially in more complicated geometry. The alternative choice may be left for Large Eddy Simulation (LES) by which only large scales are solved directly. In combustion problems, capturing the large scales' behavior without solving the details of small scales is a difficult task. Using a transport equation for description of the flame front propagation and therefore avoiding the calculation of inner flame structure is the basic idea of this study. For this purpose. the so-called G-equation has been used by which any iso-level of the G variable provides the flame location. A comparison with the experiment indicates that the present method can predict a turbulent velocity field and also capture a instantaneous 3-dimensional flame structure.
Keywords
LES(Large eddy simulation); Premixed flame; Flame holder; G-equation; Flame front propagation;
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