ON DEVELOPMENT OF HYBRID COMPUTATIONAL MESHES FOR NUMERICAL SIMULATION OF TURBULENT FLOWS IN THE FLOW PART OF CENTRIFUGAL FANS

An analysis of approaches to the development of computational meshes for the simulation of turbulent flows in areas of complex geometry with moving zones is performed. The pros and cons of multiblock moving grids and the “frozen rotor” approaches are considered. The efficiency of using the "frozen rotor" approach for simulating flows in the flowing part of centrifugal fans is discussed. A method for optimizing the overlapping regions of multiblock meshes is developed. A hybrid multiblock computational grid for the flow part of a centrifugal fan suitable for using the frozen rotor approach is generated. The details of its structure are presented. The subsequent simulations of the turbulent flows based on the complex of generated multiblock meshes showed high quality of the obtained numerical results and sufficient consistency with the known experimental data.