Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
CFD INVESTIGATION OF IMPELLER DIFFUSER INTERACTION EFFECTS ON RADIAL COMPRESSOR STAGE
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The effects of impeller-diffuser interaction are investigated through numerically simulating the modified wedge vane profiles. Steady and time-accurate, 3D- viscous RANSsolver is used to perform flow field computations.

The original design is modified to obtain better aerodynamic performance. Five morechanges are made to the leading edge profile of the new design, in order to assess different degrees of unsteadiness. These changes show that their contribution on stageefficiency is rather minor, while they have a huge reduction on blade loadings. Moreover, it is shown that the shorter radial distance of vaneless space does not necessarilymean an increased loading thanks to the eliminating in-phase fluctuations on pressureand suction sides.

It is found that the impeller reacts to the upstream static pressure disturbance, whichis caused by the applied geometry change and its resultant flow field in the wedge diffuser, but not to the radial location of a certain profile. In addition, the results indicatethat the wedge diffuser aerodynamic performance is driven by time-averaged flow fieldbehaviour.

Place, publisher, year, edition, pages
2014. , 83 p.
Keyword [en]
CFD, impeller-diffuser interaction, radial compressor, centrifugal compressor, vaneless space
National Category
Mechanical Engineering Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-157534OAI: oai:DiVA.org:kth-157534DiVA: diva2:770579
Educational program
Master of Science - Turbomachinery Aeromechanic University Training
Presentation
2014-09-23, Royal Institute of Technology, KTH, Brinellvägen 68, Stockholm, 15:00 (English)
Supervisors
Examiners
Available from: 2014-12-15 Created: 2014-12-10 Last updated: 2014-12-15Bibliographically approved

Open Access in DiVA

fulltext(13684 kB)1313 downloads
File information
File name FULLTEXT01.pdfFile size 13684 kBChecksum SHA-512
ce7f368e2fde5e89b5f38885b61c31714a2f888b54e14841dbb082333c5d82dbe58f7e6634abf8669b55a2909c2cac1ee89a310b7209b85eb9dc9b8604f397e3
Type fulltextMimetype application/pdf

By organisation
Heat and Power Technology
Mechanical EngineeringFluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
Total: 1313 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 1170 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf