Simulations of Steady Cavitating Flow in a Small Francis Turbine

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ID: 89764
2016
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Ranked #38 of 48 articles by views in international journal of rotating machinery

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Abstract
The turbulent flow through a small horizontal Francis turbine is solved by means of Ansys-CFX at different operating points, with the determination of the hydrodynamic performance and the best efficiency point. The flow structures at different regimes reveal a large flow eddy in the runner and a swirl in the draft tube. The use of the mixture model for the cavity/liquid two-phase flow allowed studying the influence of cavitation on the hydrodynamic performance and revealed cavitation pockets near the trailing edge of the runner and a cavitation vortex rope in the draft tube. By maintaining a constant dimensionless head and a distributor vane opening while gradually increasing the cavitation number, the output power and efficiency reached a critical point and then had begun to stabilize. The cavitation number corresponding to the safety margin of cavitation is also predicted for this hydraulic turbine.
Reference Key
laouari2016simulationsinternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Laouari, Ahmed;Ghenaiet, Adel;
Journal international journal of rotating machinery
Year 2016
DOI
DOI not found
URL
http://dx.doi.org/10.1155/2016/4851454
Keywords
Medicine (General) Engineering (General). Civil engineering (General) Mechanical engineering and machinery water supply for domestic and industrial purposes hydraulic engineering arts in general

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