Experimental analysis of the dynamic behavior of a rotating disk submerged in water

27th IAHR Symposium on Hydraulic Machinery and Systems

Presas, A.^1 ; Valentín, D.^1 ; Egusquiza, E.^1 ; Valero, C.^1 ; Seidel, U.^2

Center for Industrial Diagnostics and Fluid Dynamics, University Polytechnic of Catalonia, Av. Diagonal 647, Barcelona

08028, Spain^1

Voith Hydro Holding GmbH and Co. KG, Alexanderstraße 11, Heidenheim

89522, Germany^2

关键词: Added mass effects;    Dynamic behaviors;    Experimental analysis;    Experimental test;    Impact device;    Natural frequencies and modes;    Rotating systems;    Turbine runner;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/22/3/032043/pdf
DOI  :  10.1088/1755-1315/22/3/032043

来源: IOP

【 摘 要 】

To study the dynamic behavior of turbine runners (natural frequencies and mode shapes) not only the added mass effect of still water has to be considered. Also the effect of rotation may not be neglected in the dynamic response. In the present study, the dynamic behavior of a rotating disk submerged in water is studied. For this purpose an experimental test rig has been developed. It consists of a rotating disk submerged in water that can be excited and its response can be measured from the rotating system by a slip ring system. For the excitation an impact device installed on the casing has been used. The response is measured with miniature accelerometers screwed on the disk. The influence of rotation on the dynamic response has been determined experimentally.