Numerical simulation of transonic turbulent flow through impeller of axial compressor…
Journal Title: Технічна механіка, Техническая механика, Technical Mechanics - Year 2014, Vol 3, Issue 3
Abstract
The work discusses the numerical simulation of a transonic turbulent flow through impeller of the Rotor 67 axial compressor with the application of the OpenFOAM open programming code. The selection of the turbulence model for the numerical simulation of transonic flows is considered. The Spalart–Allmaras turbulence models, a standard k – ε model and SST Menter turbulence models are comparatively tested solving the problem of the simulation of the flow through transonic diffusor. According to the results, preference is given to the Spalart–Allmaras turbulence model. Numerical simulation of the flow through plane diffuser profile in cascade is done. The multiple-block computational grid of the O-type is used. The resulting dependences of the aerodynamic char-acteristics on the flow velocity through cascade inlet are in satisfactory agreement with the experimental data. It is shown that the accuracy of the approximation of the profile front and rear edges does not affect the accuracy of calculations of the cascade aerodynamic characteristics. The three-dimensional transonic turbulent flow through Rotor 67 impeller is numerically simulated. The geometric model is realized without a gap between the blades and the surface of the periphery. A multiple-block computational grid of the H-type is employed for the approximation of the computational region. The derived dependence of the degree of a total pressure increase on the gas mass flow through impeller is consistent with the experimental data and calculations of other authors. The results confirm the applicability of the OpenFOAM open code for solving problems related to the numerical simulation of the flow through blade wheels of axial compressors.
Authors and Affiliations
S. Melashich, Yu. Kvasha
Keywords
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