Numerical Simulation and Experimental Verification of Downstream Fish migration in a Kaplan turbine

Helmut Benigni*, Josef Schneider, Walter Reckendorfer, Helmut Jaberg, Gerald Zenz, Jeffrey Tuhtan

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Fish migrating downstream may face an increased risk of injury when passing through hydropower turbines. The overall influence on fish populations remains unknown. Still, it is undoubtedly linked to the damage potential of the turbines, the stage of maturity and the size of the migrating individuals as well as the proportion of migrating fish in relation to the total population. The sources of injury are usually the contact to the turbine blade and the rapid pressure drop in the turbine as well as shear forces, and large-scale turbulence. The authors investigated the conditions experienced by fish migrating through a 5-bladed vertical Kaplan turbine, each of the two units with a nominal power of 45 MW. Therefore, so-called "Barotrauma Detection Sensors (BDS)"were applied to determine the physical parameters during the turbine passages. Additionally, live fish, fitted externally with Barotrauma Detection Sensors, were introduced.

Original languageEnglish
Article number012149
JournalIOP Conference Series: Earth and Environmental Science
Issue number1
Publication statusPublished - 15 Jun 2021
Event30th IAHR Symposium on Hydraulic Machinery and Systems: IAHR 2020 - Virtuell, Switzerland
Duration: 21 Mar 202126 Mar 2021

ASJC Scopus subject areas

  • Energy(all)

Fields of Expertise

  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)

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