Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
Numerical study on jet flow characteristics of high head and large discharge spillways
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2014 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Today scale models are used to design spillway structures for hydropower stations. These are expensive and time-consuming to build and alter. This study investigates the possibilities of using numerical simulations in order to facilitate the spillway design process. It would be possible to save time and resources by altering the spillway parameters in the numerical model and thus find an optimal design, which can be further investigated with a scale model.

However, it is complicated to simulate turbulent flows. Therefore the simulated flows in this study are compared to experimental measurements in order to investigate the accuracy of the numerical model. Ansys software Fluent uses Computational Fluid Dynamics (CFD) to calculate turbulent flows and is used as the simulation tool in this study.

The simulations were performed on the spillway system of Shuibuya hydropower station. There are five spillway channels with flip bucket terminals and high head. In order to investigate the risk of erosion during large flows the jet throw distance was examined in experiments on a scale model. The same parameter was investigated in this simulation study.

The acceptable error margin was set 30 % for the comparison between simulated and experimental measurements. All performed simulations met this criterion. It was therefore concluded that Fluent could be used as a sufficiently good approximation tool when it comes to turbulent flows in spillways. 

Place, publisher, year, edition, pages
2014. , 53 p.
Series
UPTEC ES, ISSN 1650-8300 ; 14007
Keyword [en]
Spillway design, energy dissipation, CFD, Fluent, jet nappe, erosion
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:uu:diva-223777OAI: oai:DiVA.org:uu-223777DiVA: diva2:714017
External cooperation
Vattenfall AB & Elforsk
Educational program
Master Programme in Energy Systems Engineering
Supervisors
Examiners
Available from: 2014-05-23 Created: 2014-04-24 Last updated: 2014-05-23Bibliographically approved

Open Access in DiVA

fulltext(11573 kB)1042 downloads
File information
File name FULLTEXT01.pdfFile size 11573 kBChecksum SHA-512
6a57aa6e4428f0c04d89249aaa21123c4ab5743eca8b38e8e15b547dcc8307e3f29366e3aecf03dd43ba7a03f61ab71379255d738321325914d8940d134d658a
Type fulltextMimetype application/pdf

By organisation
Electricity
Energy Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 1042 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: 1159 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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