Research on Rotation/Curvature Correction Method of SA Turbulence Model for Numerical Simulation of Axial Compressor

Abstract

The strong rotation effect exists in the flow of compressors, but it is rarely considered in the common turbulence models used in numerical simulation. In addition, when the widely used turbulence model is applied to the numerical simulation of compressor flow, it often needs to be modified. In order to evaluate the applicability of various turbulence model modification methods in axial compressor flow simulation, and explore suitable modification methods. Based on the numerical simulation software ASPAC for axial flow compressor developed by our research group, three turbulence model rotation/curvature correction methods were implemented based on SA turbulence model and applied to the flow simulation of Rotor 37. The results show that the modified models mainly affect the flow separation of the rotor suction surface. Specifically, the SA-Helicity model improves the prediction accuracy of the separation flow in the compressor. The total temperature and pressure calculated by SA-R and SA-RC models are on the small side. In this study, the applicability of rotation/curvature correction method of various SA turbulence models in compressor flow simulation is evaluated in detail based on transonic compressor, which provides a basis for the selection of turbulence models and the research of turbulence model and correction methods adapted to compressor simulations.