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Evaluation of turbulent SGS model for large eddy simulation of turbulent flow inside a sudden expansion cylindrical chamber  

최창용 (전주대학교 기계공학과)
고상철 (전주대학교 기계공학과)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.28, no.3, 2004 , pp. 423-433 More about this Journal
Abstract
A large eddy simulation (LES) is performed for turbulent flow in a combustion device. The combustion device is simplified as a cylindrical chamber with sudden expansion. A flame holder is attached inside a cylindrical chamber in order to promote turbulent mixing and to accommodate flame stability. The turbulent sub-grid scale models are applied and validated. Emphasis is placed on the evaluation of turbulent model for the LES of complex geometry. The simulation code is constructed by using a general coordinate system based on the physical contravariant velocity components. The calculated Reynolds number is 5000 based on the bulk velocity and the diameter of inlet pipe. The predicted turbulent statistics are evaluated by comparing with the LDV measurement data. The Smagorinsky model coefficients are estimated and the utility of dynamic SGS models are confirmed in the LES of complex geometry.
Keywords
LES(Large Eddy Simulation); Physical Contravariant Velocity Component; Turbulent SGS Model; Flame Holder;
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