dc.contributor
Universitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.contributor
Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria
dc.contributor
Universitat Politècnica de Catalunya. REMM - Recerca en Estructures i Mecànica de Materials
dc.contributor.author
Roig Bauzà, Rafel
dc.contributor.author
Sánchez Botello, Xavier
dc.contributor.author
Torre Rodríguez, Óscar de la
dc.contributor.author
Ayneto Gubert, Javier
dc.contributor.author
Högström, Carl-Maikel
dc.contributor.author
Mulu, Berhanu
dc.contributor.author
Escaler Puigoriol, Francesc Xavier
dc.date.issued
2023-09-07
dc.identifier
Roig, R. [et al.]. Fatigue damage analysis of a Kaplan turbine model operating at off-design and transient conditions. "Structural health monitoring: an international journal", 7 Setembre 2023, vol. 23, núm. 3, 1687-1700.
dc.identifier
https://hdl.handle.net/2117/393553
dc.identifier
10.1177/14759217231191417
dc.description.abstract
© The Author(s) 2023.
dc.description.abstract
The current renewable energy market forces hydraulic turbines to operate for longer periods of time at off-design and transient conditions. Their life expectancy is then decreased due to the wear provoked by flow instabilities and stochastic flow excitations. This study presents an experimental investigation into the fatigue damage induced on the runner blades of a Kaplan turbine model when working at speed-no-load (SNL), part load (PL) and during ramps of load. The unit was equipped with on-board sensors on the blades and the shaft as well as with off-board sensors installed on the supporting structure and the draft tube cone. The results reveal that operation at SNL induces more fatigue damage on the runner blades than at PL. The damage is then mainly induced by stochastic flow excitations at SNL and by the rotating mode of the rotating vortex rope (RVR) at PL. The ramps of load, when crossing each operating condition, cause levels of damage similar to those found in stationary operation. Finally, it was proved that the blade fatigue damage can be estimated from on-board shaft measurements at any condition. However, the blade fatigue damage can only be estimated using off-board measurements when the RVR is fully developed at PL.
dc.description.abstract
This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 814958. Additionally, the present authors would like to acknowledge the technical support received from Vattenfall AB.
dc.description.abstract
Peer Reviewed
dc.description.abstract
Postprint (author's final draft)
dc.format
application/pdf
dc.relation
https://journals.sagepub.com/doi/10.1177/14759217231191417
dc.relation
info:eu-repo/grantAgreement/EC/H2020/814958/EU/Active Flow Control system FOR improving HYDRaulic turbine performances at off-design Operation/AFC4Hydro
dc.rights
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights
Attribution-NonCommercial-NoDerivatives 4.0 International
dc.subject
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluids
dc.subject
Hydraulic turbines
dc.subject
Materials -- Fatigue
dc.subject
Fatigue damage
dc.subject
Kaplan turbine model
dc.subject
Off-design operation
dc.subject
Transient operation
dc.subject
On-board measurements
dc.subject
Rainflow counting algorithm
dc.subject
Turbines hidràuliques
dc.subject
Materials -- Fatiga
dc.title
Fatigue damage analysis of a Kaplan turbine model operating at off-design and transient conditions
