Modal behavior of a reduced scale pump-turbine impeller. Part II. Numerical Simulation
Visualitza/Obre
model II.pdf (1,719Mb) (Accés restringit)
Sol·licita una còpia a l'autor
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
Cita com:
hdl:2117/9718
Tipus de documentComunicació de congrés
Data publicació2010
Condicions d'accésAccés restringit per política de l'editorial
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
A numerical simulation has been carried out to analyze the modal behavior of a
reduced scale pump-turbine impeller. The simulation has been done using FEM method, in air
and in water. The same boundary conditions than in the experiment were considered: free body
in air and free body submerged in a reservoir of water. A sensitivity analysis to determine the
influence of the number of elements was done. The influence of the input parameters was also
taken into account. Finally, a mesh with 165000 elements for the impeller in air and of 508676
for the impeller in water was used. The results obtained with the simulation have been
compared with the experimental ones (paper 1). Both the natural frequency values and the
mode-shapes were compared. The numerical results showed small deviation from experiment
in the first modes in modes with low modal density. In some coupled modes been found. With
the updated model the mode-shapes have been analyzed. Some modes with high modal density
have been found. As indicated in the experiment, the effect of the added mass reduces the
natural frequencies and also changes the characteristics of the coupled modes
CitacióValero, M. [et al.]. Modal behavior of a reduced scale pump-turbine impeller. Part II. Numerical Simulation. A: IAHR Symposium on Hydraulic Machinery and Systems. "Proceedings 25th IAHR Symposium on Hydraulic Machinery and Systems". Timisoara: 2010, p. 926-934.
ISBN978-606-554-136-8
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
model II.pdf | 1,719Mb | Accés restringit |