1998 Volume 18 Issue Supplement1 Pages 59-62
This study is concerned with the large-eddy simulation (LES) of a turbulent flow in combustor with a complex geometry. In the paper, a jet is considered to discharge into a sudden expansion and to impinge on the circular plate located in the combustion chamber. Its flow pattern resembles that of a premixed jet-combustor. Thus, the purpose of this study is to investigate details of the flow phenomena in such a combustion device.
In this calculation, we constructed the numerical code using combined grid technique based on the generalized coordinates and the cylindrical coordinates. This method can eliminate numerical difficulties related with both a singular point in the cylindrical coordinates and numerical errors in the generalized coordinates at the place where the mesh is severely distorted.the smagorinsky model was applied to the subgrid-scale stress. The Reynolds number was 5000, based on the bulk velocity and the diameter of the inlet section. The mean velocities are compared with experimental data in order to verify the accuracy of present analysis results.
