Large Eddy Simulation of Turbulent Flow Inside a Sudden Expansion Cylinder Chamber

- Journal title : Transactions of the Korean Society of Mechanical Engineers B
- Volume 25, Issue 7, 2001, pp.885-894
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-B.2001.25.7.885

Title & Authors

Large Eddy Simulation of Turbulent Flow Inside a Sudden Expansion Cylinder Chamber

Seong, Hyeong-Jin; Go, Sang-Cheol;

Seong, Hyeong-Jin; Go, Sang-Cheol;

Abstract

A large eddy simulation(LES) is performed for turbulent flow in a combustion device. The combustion device is simplified as a cylinder with sudden expansion. To promote turbulent mixing and to accommodate flame stability, a flame holder is attached inside the combustion chamber. Emphasis is placed on the flow details with different geometries of the flame holder. The subgrid scale models are applied and validated. The simulation code is constructed by using a general coordinate system based on the physical contravariant velocity components. The calculated Reynolds numbers are 5000 and 50000 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 agreement of LES with the experimental data is shown to be satisfactory.

Keywords

Large Eddy Simulation;Physical Contravariant Velocity Component;Generalized Coordinate;Flame Holder;

Language

Korean

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