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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) 2006 ASME 51st Turbo Expo In Proceedings of the ASME Turbo Expo 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
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Uniform flow pattern, Vaneless diffusers, Secondary flux fraction
in
Proceedings of the ASME Turbo Expo
volume
6 PART B
pages
1077 - 1086
publisher
American Society Of Mechanical Engineers (ASME)
conference name
2006 ASME 51st Turbo Expo
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
2007-11-24 10:28:35
date last changed
2016-10-13 04:44:02
@misc{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},
  isbn         = {0-7918-4241-X},
  keyword      = {Uniform flow pattern,Vaneless diffusers,Secondary flux fraction},
  language     = {eng},
  pages        = {1077--1086},
  publisher    = {ARRAY(0x9c640a0)},
  series       = {Proceedings of the ASME Turbo Expo},
  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},
}