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Numerical investigation of the effect of different back sweep angle and exducer width on the impeller outlet flow pattern of a centrifugal compressor with vaneless diffuser

Författare

Summary, in English

This paper presents a numerical investigation of the effect of different back sweep angles and exducer widths on the steady-state impeller outlet flow pattern of a centrifugal compressor with a vaneless diffuser. The investigations have been performed with commercial CFD and in-house programmed 1-D codes. CFD calculations aim to investigate how flow pattern from the impeller is quantitatively influenced by compressor geometry parameters; thereby, the location of wake and its magnitude (flow angle and relative velocity magnitude) are analyzed. Results show that the increased back sweep impeller provides a more uniform flow pattern in terms of velocity and flow deviation angle distribution, and offers better potential for the diffusion process inside a vaneless (or vaned) diffuser. Secondary flux fraction and flow deviation angle from CFD simulation arc implemented into the 1-D two-zone program to improve 1-D prediction results. Copyright

Avdelning/ar

Publiceringsår

2006

Språk

Engelska

Sidor

1077-1086

Publikation/Tidskrift/Serie

Proceedings of the ASME Turbo Expo

Volym

6 PART B

Dokumenttyp

Konferensbidrag

Förlag

American Society Of Mechanical Engineers (ASME)

Ämne

  • Energy Engineering

Nyckelord

  • Uniform flow pattern
  • Vaneless diffusers
  • Secondary flux fraction

Conference name

51st ASME Turbo Expo 2006

Conference date

2006-05-06 - 2006-05-11

Conference place

Barcelona, Spain

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 0-7918-4241-X