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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

Hildebrandt, Andre LU and Genrup, Magnus LU (2007) 51st ASME Turbo Expo 2006 129(2). p.421-433
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 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... (More)
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. (Less)
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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Journal of Turbomachinery - Transaction of the ASME
volume
129
issue
2
pages
421 - 433
publisher
American Society Of Mechanical Engineers (ASME)
conference name
51st ASME Turbo Expo 2006
conference location
Barcelona, Spain
conference dates
2006-05-06 - 2006-05-11
external identifiers
  • wos:000246283800023
  • scopus:34249884217
ISSN
0889-504X
1528-8900
DOI
10.1115/1.2447873
language
English
LU publication?
yes
id
f37bcb03-2511-44a1-a49c-cdf679c81a1f (old id 1415267)
date added to LUP
2016-04-01 11:44:03
date last changed
2025-10-14 10:37:45
@inproceedings{f37bcb03-2511-44a1-a49c-cdf679c81a1f,
  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 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.}},
  author       = {{Hildebrandt, Andre and Genrup, Magnus}},
  booktitle    = {{Journal of Turbomachinery - Transaction of the ASME}},
  issn         = {{0889-504X}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{421--433}},
  publisher    = {{American Society Of Mechanical Engineers (ASME)}},
  title        = {{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}},
  url          = {{http://dx.doi.org/10.1115/1.2447873}},
  doi          = {{10.1115/1.2447873}},
  volume       = {{129}},
  year         = {{2007}},
}