Downstream Fish migration in a Kaplan turbine – Part 2: Simulation practices and new post-processing method

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

Abstract

Downward migrating fish can be damaged when passing through turbines in the direction upstream to downstream. The main damage mechanisms are usually the contact to the turbine blade and the pressure drop in the turbine as well as shear forces, turbulence columns and others. Transient CFD calculations were performed with different boundary conditions of the start condition for the particle tracks. The results of this kind of simulation are presented in detail. Streamlines towards the machines burst open wide. For the passage through the turbine, however, this fact has a significant influence on possible damage; it is not possible to say where the passage through the runner exactly happens, at least for the turbine configuration under investigation. For the hydraulic design, the transient calculation with particle tracks is a too time-consuming method. Based on the segmentation of volumes of zones with the pressure falling below discrete pressure values, an evaluation methodology is presented.
Originalspracheenglisch
TitelConference Proceedings Hydro 2020
Herausgeber (Verlag)The International Journal of Hydropower and Dams
Seiten1-6
Seitenumfang6
Band2020
PublikationsstatusVeröffentlicht - 26 Okt 2020
VeranstaltungHydro 2020 - Virtuell, Frankreich
Dauer: 26 Okt 202028 Okt 2020
Konferenznummer: 2020

Konferenz

KonferenzHydro 2020
KurztitelHydro
LandFrankreich
OrtVirtuell
Zeitraum26/10/2028/10/20

ASJC Scopus subject areas

  • !!Energy(all)

Fields of Expertise

  • Sustainable Systems

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