Flow Behavior and Performances of Centrifugal Compressor Stage Vaneless Diffusers
Parameters of flow are calculated in vaneless diffusers
with relative width 0,014–0,10. Inlet angles of flow and similarity
criteria were varied. There is information on flow separation,
boundary layer development, configuration of streamlines.
Polytrophic efficiency, loss coefficient and recovery coefficient are
used to compare effectiveness of diffusers. The sample of
optimization of narrow diffuser with conical walls is presented. Three
wide diffusers with narrowing walls are compared. The work is made
in the R&D laboratory “Gas dynamics of turbo machines” of the TU
 Galerkin, Y.B. Tubrocompressors. (text) /Y.B.Galerkin// LTD
information and publishing center. – Moscow. – KHT. -2010. – P. 596.
 Seleznev, K.P., Galerkin, Y.B. Centrifugal compressors. (text) /K.P.
Seleznev, Y.B.Galerkin // Leningrad. – 1982. – P. 271. (in Russian).
 Y.B. Galerkin, K.V. Soldatova. Modeling of industrial compressor
process of operation. Scientific background, stages of development,
modern state. (text) /Y.B.Galerkin, K.V. Soldatova// STU. – SPb. -
2011. - P. 327.
 Y. Galerkin, O.A. Solovieva. Improvement of vaneless diffusers
calculation based on CFD experiments. Part 1. // Compressors and
pneumatics. 2014. – № 3. - |P. 35-41. (in Russian).
 Y.B. Galerkin, O.A. Solovieva. Improvement of vaneless diffusers
calculation based on CFD experiments. Part 2. // Compressors and
pneumatics, 2014. – № 4. – P. 15-21. (in Russian).