Abstract
The complexity of the flow structure in Pelton turbines makes it challenging to gain a detailed insight into the local flow processes. However, CFD methods offer vast potential for developing and optimising Pelton turbines due to these complex flow conditions. In a comprehensive examination, a six-nozzle prototype Pelton turbine with 19 buckets has been investigated using 3D CFD simulations. First, the steady simulations of the manifold and the unsteady runner simulation have been performed with a mesh-based, commercial CFD code, whereby a two-equation turbulence model and the homogeneous two-phase model were used. Then, to limit the simulation time and the computational cost, symmetry was applied in the runner simulation, and also a sophisticated meshing strategy. Subsequently, the simulation results are analysed. The examination of the manifold provided a detailed insight into the occurrence of losses and local flow conditions, especially upstream the nozzle, which allows for a better understanding of the jet shape. Furthermore, the results of the runner simulation were analysed with special regard to the jet-bucket interaction from start to end of the impingement cycle of a particular bucket. Finally, the enhancement potential could be derived from the summary.
Translated title of the contribution | Transiente 3D CFD Simulation einer Pelton Turbine – Ein Ansatz für die Entwicklung und die Optimierung einer Pelton Turbine nach dem Stand der Technik |
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Original language | English |
Title of host publication | Proceedings of the Conference on Modelling Fluid Flow CMFF’22 |
Editors | J. Vad |
Place of Publication | Budapest |
Publisher | Budapest University of Technology and Economics |
Pages | 258-266 |
Number of pages | 9 |
ISBN (Electronic) | 978-963-421-881-4 |
Publication status | Published - 2 Sept 2022 |
Event | 18th International Conference on Fluid Flow Technologies: CMFF 2022 - Budapest, Hungary Duration: 30 Aug 2022 → 2 Sept 2022 |
Conference
Conference | 18th International Conference on Fluid Flow Technologies |
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Abbreviated title | CMFF '22 |
Country/Territory | Hungary |
City | Budapest |
Period | 30/08/22 → 2/09/22 |
ASJC Scopus subject areas
- General Engineering
Fields of Expertise
- Sustainable Systems