Numerical Investigation of a Transonic Centrifugal Compressor

TitleNumerical Investigation of a Transonic Centrifugal Compressor
Publication TypeConference Proceedings
Year of Publication2006
AuthorsMarconcini M, Rubechini F, Arnone A, Ibaraki S
Conference NameASME Turbo Expo 2006: Power for Land, Sea, and Air
Volume6: Turbomachinery, Parts A and B
Date Published05/2006
Conference LocationBarcelona, Spain, May 8–11, 2006
ISBN Number0-7918-4241-X
Accession NumberWOS:000242494000095
Other NumbersScopus 2-s2.0-33750868799
AbstractA three-dimensional Navier-Stokes solver is used to investigate the flow field of a high pressure ratio centrifugal compressor for turbocharger applications. Such a compressor consists of a double-splitter impeller followed by a vane diffuser. The inlet flow to the open shrouded impeller is transonic, thus giving rise to interactions between shock waves and boundary layers and between shock waves and tip leakage vortices. These interactions generate complex flow structures which are convected and distorted through the impeller blades. Detailed Laser Doppler Velocimetry (LDV) flow measurements are available at various cross sections inside the impeller blades highlighting the presence of low velocity flow regions near the shroud. Particular attention is focused on understanding the physical mechanisms which govern the flow phenomena in the near shroud region. To this end numerical investigations are performed using different tip clearance modelizations and various turbulence models, and their impact on the computed flow field is discussed.
Refereed DesignationRefereed