Authors

Verification of numerical simulation results for low-flow centrifugal compressor stage with experimental data by Numeca Fine/Turbo and Ansys CFX software packages

DOI: 10.17586/1606-4313-2021-20-3-32-38
UDC 621.515

Verification of numerical simulation results for low-flow centrifugal compressor stage with experimental data by Numeca Fine/Turbo and Ansys CFX software packages

Shtanichev Rostislav A. , Yablokov Aleksei M. , Sadovsky Nikolay I.

For citation: Shtanichev R.A., Yablokov A.M., Sadovsky N.I. Verification of numerical simulation results for low-flow centrifugal compressor stage with experimental data by Numeca Fine/Turbo and Ansys CFX software packages. Journal of International Academy of Refrigeration. 2021. No 3. p. 32-38. DOI: 10.17586/1606-4313-2021-20-3-32-38

Abstract
The article concerns verification of numerical simulation results for viscous gas flow and model tests of a low-flow centrifugal compressor stage with conditional discharge coefficient Ф= 0.009. This type of stage has the narrow channels in the impeller and fixed elements, which causes increased friction losses and leakage compared to high-and medium-flow centrifugal stages. The numerical simulation was carried out using two software packages: Numeca Fine/Turbo 13.2 and Ansys CFX 19.2. The modules used and the features of their application in these products are described. The task was solved in a stationary delivery with boundary conditions as close as possible to the experiment. Geometric and grid models of the stage in question were constructed. The stage gas-dynamic characteristics (dependence of the polytropic efficiency and polytropic head on the conditional flow coefficient) were determined by six calculation points. The results obtained are compared with experimental data by two cross-sections: behind the impeller and at the stage exit.

Keywords: centrifugal compressor, Numeca Fine/Turbo, Ansys CFX, low-flow stage

All references

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