{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,17]],"date-time":"2026-01-17T18:47:06Z","timestamp":1768675626627,"version":"3.49.0"},"reference-count":35,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2019,9,19]],"date-time":"2019-09-19T00:00:00Z","timestamp":1568851200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Seventh Framework Programme","award":["608532"],"award-info":[{"award-number":["608532"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Nowadays, hydropower is demanded to provide flexibility and fast response into the electrical grid in order to compensate the non-constant electricity generation of other renewable sources. Hydraulic turbines are therefore demanded to work under off-design conditions more frequently, where different complex hydraulic phenomena appear, affecting the machine stability as well as reducing the useful life of its components. Hence, it is desirable to detect in real-time these hydraulic phenomena to assess the operation of the machine. In this paper, a large medium-head Francis turbine was selected for this purpose. This prototype is instrumented with several sensors such as accelerometers, proximity probes, strain gauges, pressure sensors and a microphone. Results presented in this paper permit knowing which hydraulic phenomenon is detected with every sensor and which signal analysis technique is necessary to use. With this information, monitoring systems can be optimized with the most convenient sensors, locations and signal analysis techniques.<\/jats:p>","DOI":"10.3390\/s19184053","type":"journal-article","created":{"date-parts":[[2019,9,19]],"date-time":"2019-09-19T11:02:01Z","timestamp":1568890921000},"page":"4053","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Detection of Hydraulic Phenomena in Francis Turbines with Different Sensors"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7125-0734","authenticated-orcid":false,"given":"David","family":"Valent\u00edn","sequence":"first","affiliation":[{"name":"Center for Industrial Diagnostics and Fluid Dynamics (CDIF), Universitat Polit\u00e8cnica de Catalunya (UPC), Av. Diagonal, 647, ETSEIB, 08028, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6041-4139","authenticated-orcid":false,"given":"Alexandre","family":"Presas","sequence":"additional","affiliation":[{"name":"Center for Industrial Diagnostics and Fluid Dynamics (CDIF), Universitat Polit\u00e8cnica de Catalunya (UPC), Av. Diagonal, 647, ETSEIB, 08028, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carme","family":"Valero","sequence":"additional","affiliation":[{"name":"Center for Industrial Diagnostics and Fluid Dynamics (CDIF), Universitat Polit\u00e8cnica de Catalunya (UPC), Av. Diagonal, 647, ETSEIB, 08028, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1777-1840","authenticated-orcid":false,"given":"M\u00f2nica","family":"Egusquiza","sequence":"additional","affiliation":[{"name":"Center for Industrial Diagnostics and Fluid Dynamics (CDIF), Universitat Polit\u00e8cnica de Catalunya (UPC), Av. Diagonal, 647, ETSEIB, 08028, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eduard","family":"Egusquiza","sequence":"additional","affiliation":[{"name":"Center for Industrial Diagnostics and Fluid Dynamics (CDIF), Universitat Polit\u00e8cnica de Catalunya (UPC), Av. 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Instrum."},{"key":"ref_4","unstructured":"IEC 60193 (1999). Hydraulic Turbines, Storage Pumps and Pump-Turbines Model Acceptance Tests, International Electrotechnical Commission. Standard No. IEC 60193."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Presas, A., Valent\u00edn, D., Egusquiza, M., Valero, C., and Egusquiza, E. (2018). Sensor-Based Optimized Control of the Full Load Instability in Large Hydraulic Turbines. Sensors, 18.","DOI":"10.3390\/s18041038"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"12038","DOI":"10.1088\/1742-6596\/813\/1\/012038","article-title":"Detection and analysis of part load and full load instabilities in a real Francis turbine prototype","volume":"813","author":"Presas","year":"2017","journal-title":"J. Physics Conf. Ser."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Favrel, A., Junior, J.G.P., Landry, C., Allign\u00e9, S., Andolfatto, L., Nicolet, C., and Avellan, F. (2019). Prediction of hydro-acoustic resonances in hydropower plants by a new approach based on the concept of swirl number. J. Hydraul. Res., 1\u201318.","DOI":"10.1080\/00221686.2018.1555556"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"547","DOI":"10.1016\/j.ymssp.2015.01.013","article-title":"On the detection of natural frequencies and mode shapes of submerged rotating disk-like structures from the casing","volume":"60","author":"Presas","year":"2015","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/j.jfluidstructs.2017.05.008","article-title":"Numerical study on the influence of acoustic natural frequencies on the dynamic behaviour of submerged and confined disk-like structures","volume":"73","author":"Bossio","year":"2017","journal-title":"J. Fluids Struct."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Valero, C., Egusquiza, M., Egusquiza, E., Presas, A., Valentin, D., and Bossio, M. (2017). Extension of Operating Range in Pump-Turbines. Influence of Head and Load. Energies, 10.","DOI":"10.3390\/en10122178"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"46","DOI":"10.1016\/j.measurement.2018.01.030","article-title":"Advanced condition monitoring of Pelton turbines","volume":"119","author":"Egusquiza","year":"2018","journal-title":"Measurement"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1016\/j.measurement.2015.01.004","article-title":"Condition monitoring of pump-turbines. New challenges","volume":"67","author":"Egusquiza","year":"2015","journal-title":"Measurement"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"12041","DOI":"10.1088\/1742-6596\/813\/1\/012041","article-title":"Condition monitoring of a prototype turbine. Description of the system and main results","volume":"813","author":"Valero","year":"2017","journal-title":"J. Physics Conf. Ser."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1016\/j.engfailanal.2012.01.012","article-title":"Failure investigation of a large pump-turbine runner","volume":"23","author":"Egusquiza","year":"2012","journal-title":"Eng. Fail. Anal."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"234","DOI":"10.1016\/j.engfailanal.2017.06.048","article-title":"Failure investigation of a Pelton turbine runner","volume":"81","author":"Egusquiza","year":"2017","journal-title":"Eng. Fail. Anal."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"690","DOI":"10.1016\/j.engfailanal.2019.01.056","article-title":"Failure investigation of a Kaplan turbine blade","volume":"97","author":"Zhang","year":"2019","journal-title":"Eng. Fail. Anal."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Valent\u00edn, D., Presas, A., Bossio, M., Egusquiza, M., Egusquiza, E., and Valero, C. (2018). Feasibility of Detecting Natural Frequencies of Hydraulic Turbines While in Operation, Using Strain Gauges. Sensors, 18.","DOI":"10.3390\/s18010174"},{"key":"ref_18","first-page":"72004","article-title":"Influence of the boundary conditions on the natural frequencies of a Francis turbine","volume":"49","author":"Ramos","year":"2016","journal-title":"IOP Conf. Series: Earth Environ. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Yamamoto, K., M\u00fcller, A., Favrel, A., Landry, C., and Avellan, F. (2017, January 2\u20133). Flow characteristics and influence associated with inter-blade cavitation vortices at deep part load operations of a Francis turbine. Proceedings of the Hyperbole Conference, Porto, Portugal.","DOI":"10.1088\/1742-6596\/813\/1\/012029"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1007\/s00348-017-2421-z","article-title":"Experimental evidence of inter-blade cavitation vortex development in Francis turbines at deep part load condition","volume":"58","author":"Yamamoto","year":"2017","journal-title":"Exp. Fluids"},{"key":"ref_21","first-page":"171","article-title":"Power swings in hydroelectric power plants","volume":"62","author":"Rheingans","year":"1940","journal-title":"Trans. ASME"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Valent\u00edn, D., Presas, A., Egusquiza, E., Valero, C., Egusquiza, M., and Bossio, M. (2017). Power Swing Generated in Francis Turbines by Part Load and Overload Instabilities. Energies, 10.","DOI":"10.3390\/en10122124"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"215","DOI":"10.1007\/s00348-015-2085-5","article-title":"Study of the vortex-induced pressure excitation source in a Francis turbine draft tube by particle image velocimetry","volume":"56","author":"Favrel","year":"2015","journal-title":"Exp. Fluids"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Favrel, A., M\u00fcller, A., Landry, C., Gomes, J., Yamamoto, K., and Avellan, F. (2017, January 2\u20133). Dynamics of the precessing vortex rope and its interaction with the system at Francis turbines part load operating conditions. Proceedings of the Hyperbole Conference, Porto, Portugal.","DOI":"10.1088\/1742-6596\/813\/1\/012023"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"168","DOI":"10.1007\/s00348-016-2257-y","article-title":"LDV survey of cavitation and resonance effect on the precessing vortex rope dynamics in the draft tube of Francis turbines","volume":"57","author":"Favrel","year":"2016","journal-title":"Exp. Fluids"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1016\/j.ymssp.2018.07.053","article-title":"Dynamic modal analysis during reduced scale model tests of hydraulic turbines for hydro-acoustic characterization of cavitation flows","volume":"117","author":"Favrel","year":"2019","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_27","unstructured":"Ruchonnet, N., Nicolet, C., and Avellan, F. (2006, January 17\u201321). One-dimensional modeling of rotor stator interaction in Francis pump-turbine. Proceedings of the Proceedings of the 23rd IAHR Symposium on Hydraulic Machinery and Systems, Yokohama, Japan."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"289","DOI":"10.5293\/IJFMS.2011.4.2.289","article-title":"Vibration Behavior and Dynamic Stress of Runners of Very High Head Reversible Pump-turbines","volume":"4","author":"Tanaka","year":"2011","journal-title":"Int. J. Fluid Mach. Syst."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"11919","DOI":"10.3390\/s140711919","article-title":"Feasibility of Using PZT Actuators to Study the Dynamic Behavior of a Rotating Disk due to Rotor-Stator Interaction","volume":"14","author":"Presas","year":"2014","journal-title":"Sensors"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.jfluidstructs.2016.11.018","article-title":"Fluid\u2013structure interaction mechanisms leading to dangerous power swings in Francis turbines at full load","volume":"69","author":"Favrel","year":"2017","journal-title":"J. Fluids Struct."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"32034","DOI":"10.1088\/1755-1315\/22\/3\/032034","article-title":"On the physical mechanisms governing self-excited pressure surge in Francis turbines","volume":"22","author":"Favrel","year":"2014","journal-title":"IOP Conf. Ser. Earth Environ. Sci."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"032040","DOI":"10.1088\/1755-1315\/15\/3\/032040","article-title":"Interaction of a pulsating vortex rope with the local velocity field in a Francis turbine draft tube","volume":"15","author":"Bullani","year":"2012","journal-title":"IOP Conf. Ser. Earth Environ. Sci."},{"key":"ref_33","unstructured":"(2019, September 10). Hyperbole Project HYdropower Plants PERformance and flexiBle Operation Towards Lean integration of New Renewable Energies. Available online: https:\/\/hyperbole.epfl.ch."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"983","DOI":"10.1016\/j.ymssp.2004.08.006","article-title":"Detection of cavitation in hydraulic turbines","volume":"20","author":"Escaler","year":"2006","journal-title":"Mech. Syst. Signal Process."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Valent\u00edn, D., Presas, A., Egusquiza, M., Valero, C., and Egusquiza, E. (2018). Transmission of High Frequency Vibrations in Rotating Systems. Application to Cavitation Detection in Hydraulic Turbines. Appl. Sci., 8.","DOI":"10.3390\/app8030451"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/18\/4053\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:22:04Z","timestamp":1760188924000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/18\/4053"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,9,19]]},"references-count":35,"journal-issue":{"issue":"18","published-online":{"date-parts":[[2019,9]]}},"alternative-id":["s19184053"],"URL":"https:\/\/doi.org\/10.3390\/s19184053","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,9,19]]}}}