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
Author
Summary, in English
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
Department/s
Publishing year
2006
Language
English
Pages
1077-1086
Publication/Series
Proceedings of the ASME Turbo Expo
Volume
6 PART B
Document type
Conference paper
Publisher
American Society Of Mechanical Engineers (ASME)
Topic
- Energy Engineering
Keywords
- Uniform flow pattern
- Vaneless diffusers
- Secondary flux fraction
Conference name
51st ASME Turbo Expo 2006
Conference date
2006-05-06 - 2006-05-11
Conference place
Barcelona, Spain
Status
Published
ISBN/ISSN/Other
- ISBN: 0-7918-4241-X