Furnace modeling using a parallelized domain decomposition method with locally refined subgrids

摘要

For the detailed numerical simulation of power plant furnaces the combustion chamber must be subdivided into a number of finite volumes which reasonably reflect the overall geometry and which are able to resolve the local boundary conditions at the burners and auxiliary jet inlets. Due to the size of the furnaces, the geometric complexity of modern multi-staged burners and the complex physical and chemical processes involved, this results inevitably in a large number of cells in the computational grid. Unfortunately the dependence of the required computational work on the number of grid points is, even with the best algorithms, not linear. This limits the total number of cells which can be used. Parallel CFD-Codes and the limitation of fine grids to areas where high resolution really is needed, are regarded as a way to overcome these problems.