000059019 001__ 59019
000059019 005__ 20190812204857.0
000059019 037__ $$aCONF
000059019 245__ $$aNumerical and Experimental Analysis of free Surface Flow in a 3D non Rotating Pelton Bucket
000059019 269__ $$a2002
000059019 260__ $$c2002
000059019 300__ $$a8
000059019 336__ $$aConference Papers
000059019 500__ $$aUsing Smart Source Parsing 3
000059019 520__ $$aNumerical and Experimental Analysis of Free Surface Flow in a 3D Non-Rotating Pelton Bucket Low frequency fluctuations often occur in hydraulic installations equipped with fixed bladed turbines or pumps operating under off design conditions. Passive measures, such as air admission or minor design modifications, are commonly taken as a last resort to try to reduce these phenomena. This article describes an active control approach to the problem, which is based upon a rotating valve exciter. The idea is to create an external excitation with the hydraulic exciter to diminish an undesired frequency component of the turbine’s natural excitation. One of the key elements required for this type of actuator is an adequate control strategy. It is based on a self-tuning extremum control technique, which implements an on-line identification of the optimal system parameters. The operation principles and performance issues are described and illustrated with experimental results obtained on a 90 kW Francis turbine model. The results demonstrate that the pressure fluctuations at a chosen frequency component can efficiently be reduced.
000059019 700__ $$aKvicinsky, Sonia
000059019 700__ $$g107927$$aKueny, Jean-Louis$$0241013
000059019 700__ $$g104417$$aAvellan, François$$0241012
000059019 7112_ $$dFebruary 10-14, 2002$$cHonolulu, Hawaii, USA$$aThe 9th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery
000059019 773__ $$tProceedings of the 9th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, Hawaii, USA, 10-14 February$$jFD18/FD-125
000059019 8564_ $$zn/a$$uhttps://infoscience.epfl.ch/record/59019/files/EVAPU_02_1.pdf$$s2313062
000059019 8560_ $$ffrancois.avellan@epfl.ch
000059019 909C0 $$xU10309$$pLMH$$0252135
000059019 909CO $$ooai:infoscience.tind.io:59019$$qGLOBAL_SET$$pconf$$pSTI
000059019 937__ $$aLMH-CONF-2002-013
000059019 970__ $$a1413/LMH
000059019 973__ $$rREVIEWED$$aEPFL
000059019 980__ $$aCONF