When designing centrifugal compressors, much attention is paid to increasing the efficiency of the compression process with a wide range of changes in the operating modes of the stages. In this regard, the role of methods that make it possible to calculate the characteristics taking into account the compressibility of the gas flow through the elements of the flow path increases. In this work, the development of the method for solving the second two-dimensional problem is given, which makes it possible to calculate the subsonic gas flow. In this case, impellers with both single-row and multi-row blade elements are considered.
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