000181460 001__ 181460
000181460 005__ 20190812205637.0
000181460 02470 $$2ISI
000181460 0247_ $$a10.1088/1755-1315/15/6/062064$$2doi
000181460 02470 $$a000324782300231
000181460 037__ $$aCONF
000181460 245__ $$aExperimental Identification and Study of Hydraulic Resonance Test Rig with Francis Turbine operating at Partial Load
000181460 260__ $$c2012$$bInternational Association For Hydraulic Research$$aBristol
000181460 269__ $$a2012
000181460 300__ $$a8
000181460 336__ $$aConference Papers
000181460 490__ $$v15$$aPerformances and vibration measurement and analysis
000181460 520__ $$aResonance in hydraulic systems is characterized by pressure fluctuations of high amplitude which can lead to undesirable and dangerous effects, such as noise, vibration and structural failure. For a Francis turbine operating at partial load, the cavitating vortex rope developing at the outlet of the runner induces pressure fluctuations which can excite the hydraulic system resonance, leading to undesirable large torque and power fluctuations. At resonant operating points, the prediction of amplitude pressure fluctuations by hydro-acoustic models breaks down and gives unreliable results. A more detailed knowledge of the eigenmodes and a better understanding of phenomenon occurring at resonance could allow improving the hydro-acoustic models prediction. This paper presents an experimental identification of a resonance observed in a close-looped hydraulic system with a Francis turbine reduced scale model operating at partial load. The resonance is excited matching one of the test rig eigenfrequencies with the vortex rope precession frequency. At this point, the hydro-acoustic response of the test rig is studied more precisely and used finally to reproduce the shape of the excited eigenmode.
000181460 6531_ $$aHydraulic resonance
000181460 6531_ $$aEigenmodes
000181460 6531_ $$aFrancis turbine
000181460 6531_ $$aPart load
000181460 6531_ $$aVortex rope
000181460 700__ $$g215937$$aFavrel, Arthur$$0245980
000181460 700__ $$g170545$$aLandry, Christian$$0245304
000181460 700__ $$g154802$$aMüller, Andres$$0244116
000181460 700__ $$g104417$$aAvellan, François$$0241012
000181460 7112_ $$dAugust 19-23, 2012$$cBeijing, China$$a26th IAHR Symposium on Hydraulic Machinery and Systems
000181460 7112_ $$dAugust 19–23, 2012$$cBeijing, China$$a26th Symposium on Hydraulic Machinery and Systems
000181460 773__ $$tProceedings of the 26th IAHR Symposium on Hydraulic Machinery and Systems$$q1-8$$j1
000181460 8564_ $$zn/a$$yn/a$$uhttps://infoscience.epfl.ch/record/181460/files/IAHRXXVI_280_FullPaper_ArthurFavrel.pdf$$s883692
000181460 8560_ $$femilie.reynaud@epfl.ch
000181460 909C0 $$xU10309$$pLMH$$0252135
000181460 909CO $$ooai:infoscience.tind.io:181460$$qGLOBAL_SET$$pconf$$pSTI
000181460 917Z8 $$x215937
000181460 917Z8 $$x148230
000181460 937__ $$aEPFL-CONF-181460
000181460 973__ $$rREVIEWED$$aOTHER
000181460 980__ $$aCONF