Academic Journal
Excessive vibrations experienced in a Kaplan turbine at speed no load
| العنوان: | Excessive vibrations experienced in a Kaplan turbine at speed no load |
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| المؤلفون: | Moraga González, Greco Alonso, Mut Monfort, Vicent, Girardelo, Jeferson, Mazzouji, Farid, Valentín Ruiz, David, Egusquiza Montagut, Mònica, Egusquiza Estévez, Eduard, Presas Batlló, Alexandre |
| المساهمون: | Universitat Politècnica de Catalunya. Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica, Universitat Politècnica de Catalunya. Departament de Mecànica de Fluids, Universitat Politècnica de Catalunya. CDIF - Centre de Diagnòstic Industrial i Fluidodinàmica |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2024 |
| المجموعة: | Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
| مصطلحات موضوعية: | Àrees temàtiques de la UPC::Enginyeria mecànica, Hydraulic turbines, Vibration, Mechanical engineering, Kaplan turbines, Steel, Modal analysis, Excessive vibrations, Design fault, Predictive maintenance, Turbines hidràuliques, Vibració |
| الوصف: | A Kaplan turbine unit from a new powerplant experienced high levels of vibrations and noise during the acceleration of the unit to nominal speed. These levels remained very high at speed no load. A first analysis seemed to indicate a possible blade resonance phenomenon as the highest vibrations were measured on the head cover. Nevertheless, after some modifications on the root of the blades, the vibrations remained high and the commissioning of the unit was delayed several months. To determine the origin of these vibrations, an array of sensors was installed in the machine. Different types of tests were performed. Experimental modal analyses of the runner head cover were conducted. Furthermore, experimental tests to determine the transmission of vibrations from the runner blades to the rest of the unit were carried out. Finally, the unit was tested during the acceleration phase to speed no load. Thanks to these tests, the origin of the high amplitude vibrations and loud noise perceived close to the head cover of the turbine was found. A solution to mitigate this problem was implemented by modifying the diameters of the air admission openings and their distribution, according to the up-to-date design rules. Both vibrations and noise amplitudes were drastically decreased. After this, the subsequent steps of the commissioning tests were performed and the unit started the commercial operation without major issues. ; Alexandre Presas and David Valentin want to acknowledge the Serra Hunter Program of Generalitat de Catalunya. The authors want to express their gratitude to all ELECNOR staff in the analysed powerplant, which showed their highest commitment with the tests performed there. Greco Moraga received funding from the National Agency for Research and Development (ANID) / Scholarship Program / DOCTORADO BECAS CHILE/2020 – 72210054 for his PhD scholarship. ; Peer Reviewed ; Postprint (published version) |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1873-1961 |
| Relation: | https://www.sciencedirect.com/science/article/pii/S1350630724002747; Moraga, G. [et al.]. Excessive vibrations experienced in a Kaplan turbine at speed no load. "Engineering failure analysis", Març 2024, vol. 160, núm. article 108228.; http://hdl.handle.net/2117/407169 |
| DOI: | 10.1016/j.engfailanal.2024.108228 |
| الاتاحة: | http://hdl.handle.net/2117/407169 https://doi.org/10.1016/j.engfailanal.2024.108228 |
| Rights: | Attribution 4.0 International ; http://creativecommons.org/licenses/by/4.0/ ; Open Access |
| رقم الانضمام: | edsbas.7A408C5A |
| قاعدة البيانات: | BASE |
| تدمد: | 18731961 |
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| DOI: | 10.1016/j.engfailanal.2024.108228 |