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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

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Author

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 computational fluid dynamics (CFD) and in-house programmed one-dimensional (ID) 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 are implemented into the ID two-zone program to improve ID prediction results.

Publishing year

2007

Language

English

Pages

421-433

Publication/Series

Journal of Turbomachinery - Transaction of the ASME

Volume

129

Issue

2

Document type

Conference paper

Publisher

American Society Of Mechanical Engineers (ASME)

Topic

  • Energy Engineering

Conference name

51st ASME Turbo Expo 2006

Conference date

2006-05-06 - 2006-05-11

Conference place

Barcelona, Spain

Status

Published

ISBN/ISSN/Other

  • ISSN: 1528-8900
  • ISSN: 0889-504X