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

Andre Hildebrandt, Magnus Genrup

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingResearchpeer-review

3 Citations (SciVal)

Abstract

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
Original languageEnglish
Title of host publicationProceedings of the ASME Turbo Expo
PublisherAmerican Society Of Mechanical Engineers (ASME)
Pages1077-1086
Volume6 PART B
ISBN (Print)0-7918-4241-X
Publication statusPublished - 2006
Event51st ASME Turbo Expo 2006 - Barcelona, Spain
Duration: 2006 May 62006 May 11

Publication series

Name
Volume6 PART B

Conference

Conference51st ASME Turbo Expo 2006
Country/TerritorySpain
CityBarcelona
Period2006/05/062006/05/11

Subject classification (UKÄ)

  • Energy Engineering

Keywords

  • Uniform flow pattern
  • Vaneless diffusers
  • Secondary flux fraction

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