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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 In Journal of Turbomachinery - Transaction of the ASME 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
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
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
external identifiers
  • wos:000246283800023
  • scopus:34249884217
ISSN
1528-8900
0889-504X
DOI
10.1115/1.2447873
language
English
LU publication?
yes
id
f37bcb03-2511-44a1-a49c-cdf679c81a1f (old id 1415267)
date added to LUP
2009-06-08 15:29:43
date last changed
2017-08-20 03:31:03
@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         = {1528-8900},
  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},
  volume       = {129},
  year         = {2007},
}