Numerical Predictions of the Incipient and Developed Interblade Vortex Lines of a Model Francis Turbine by Cavitation Calculations
Joint Authors
Qin, Daqing
Liu, Demin
Wu, Yu-Lin
Zuo, Zhigang
Liu, Shuhong
Source
Advances in Mechanical Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-11-20
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
The existence of runner interblade vortices can cause instability problems in Francis turbines, for example, pressure fluctuations, vibrations of runners, noise, and so forth.
It is favorable in engineering practice to have the knowledge of the appearance of the incipient and developed inter blade vortex lines on the Hill diagram in unit parameters.
Most numerical research on the inter blade vortices has been focused on the study of the characteristics of pressure fluctuations by single-phase flow calculations.
However, since the two vortex lines are distinguished by observations of visible vortices, which contain cavitating flows, it is clear that cavitation calculations are needed for their predictions.
A method by solving RANS equations with RNG k-ε turbulence model and ZGB cavitation model was proposed for the predictions in a Francis model turbine.
Modifications of the turbulence viscosity were made for better simulation results.
Vorticity criterion was chosen to identify the vortices.
The fact that the results of cavitation calculations have a better agreement with experimental observations than single-phase calculations proves the validity of this prediction method.
American Psychological Association (APA)
Zuo, Zhigang& Liu, Shuhong& Liu, Demin& Qin, Daqing& Wu, Yu-Lin. 2013. Numerical Predictions of the Incipient and Developed Interblade Vortex Lines of a Model Francis Turbine by Cavitation Calculations. Advances in Mechanical Engineering،Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-468944
Modern Language Association (MLA)
Zuo, Zhigang…[et al.]. Numerical Predictions of the Incipient and Developed Interblade Vortex Lines of a Model Francis Turbine by Cavitation Calculations. Advances in Mechanical Engineering No. 2013 (2013), pp.1-7.
https://search.emarefa.net/detail/BIM-468944
American Medical Association (AMA)
Zuo, Zhigang& Liu, Shuhong& Liu, Demin& Qin, Daqing& Wu, Yu-Lin. Numerical Predictions of the Incipient and Developed Interblade Vortex Lines of a Model Francis Turbine by Cavitation Calculations. Advances in Mechanical Engineering. 2013. Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-468944
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-468944