Numerical simulation of flow in a compressor cascade under wide range of flow conditions

• Datum: 2014
• Hauptverfasser: Папазов, С. В., Яковлев, В. А., Ершов, С. В.
• Format: Artikel
• Sprache: Russian
• Veröffentlicht: Інститут енергетичних машин і систем ім. А. М. Підгорного Національної академії наук України 2014
• Schlagworte: axial compressor; airfoil cascade; viscous flow; numerical simulation; numerical Schliren approach
• Online Zugang: https://journals.uran.ua/jme/article/view/35855
• Назва журналу: Energy Technologies & Resource Saving

The numerical results are presented for the two-dimension viscous turbulent flow of working medium through the transonic compressor cascade under wide range of flow conditions. The mathematical model is constructed on a basis of the system of the Reynolds-averaged Navier-Stokes equations and the two-equation differential k-ω SST Menter’s turbulence model supplemented by realisability constraints. The equations are integrated numerically with the implicit ENO scheme of the second order of approximation. The boundary condition treatment modification is used at the exit to improve reliability of flow computations for compressor blade rows. The detailed analysis of flow nature for working and stalling branches of the compressor characteristic is presented using computational data visualization with the Mach number contours and “numerical Schliren” approach. The obtained numerical results are in an agreement with known theoretical ideas about supersonic flows in compressors. It is shown, that for detailed visualization of complex wave flow structure for supersonic flows in compressor cascades it is appropriate to use computational meshes with about and more than 100 000 cells per a tangential section.