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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 (2006) 51st ASME Turbo Expo 2006 6 PART B. p.1077-1086
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... (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 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 (Less)
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author
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Uniform flow pattern, Vaneless diffusers, Secondary flux fraction
host publication
Proceedings of the ASME Turbo Expo
volume
6 PART B
pages
1077 - 1086
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:000242494000102
  • scopus:33750845893
ISBN
0-7918-4241-X
language
English
LU publication?
yes
id
1fb18b55-6044-4923-a7a2-c0bde993fd2f (old id 616679)
date added to LUP
2016-04-04 11:07:09
date last changed
2022-01-29 21:20:15
@inproceedings{1fb18b55-6044-4923-a7a2-c0bde993fd2f,
  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}},
  author       = {{Hildebrandt, Andre and Genrup, Magnus}},
  booktitle    = {{Proceedings of the ASME Turbo Expo}},
  isbn         = {{0-7918-4241-X}},
  keywords     = {{Uniform flow pattern; Vaneless diffusers; Secondary flux fraction}},
  language     = {{eng}},
  pages        = {{1077--1086}},
  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}},
  volume       = {{6 PART B}},
  year         = {{2006}},
}