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Effect of different configurations on 3-D analysis of flow through stay vanes And guide vanes of a francis turbine

Dadfar, R ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. Stay and guide vanes (distributor) are essential parts of a turbine. They are used to control the flow rate and to appropriately transfer the flow momentum to the runner. In this work, flow through the distributor is analyzed. For various Boundary Conditions (BC) and different configurations, threedimensional flows in the distributor of a Francis turbine are evaluated and compared with each other. The numerical simulations were carried out using Fluent software and the results were validated with a GAMM Francis turbine, where the geometry and detailed best efficiency measurements were publically available. In these simulations, the flow was assumed to be steady and the effect of turbulence was included using the k - e turbulence model. The study showed that an accurate prediction of velocity and pressure fields through the distributor may be obtained by considering a representative runner chamber with a single passage, including one blade of a stay and guide vane configuration. Furthermore, the corresponding needed computational resources for such an analysis are quite modest
  5. Keywords:
  6. Francis turbine ; 3D simulations ; Accurate prediction ; Computational resources ; Efficiency measurement ; Flowthrough ; FLUENT software ; Guide vane ; K-E turbulence model ; Numerical simulation ; Pressure field ; Stay vane ; Three-dimensional flow ; Francis turbines ; Three dimensional ; Turbines ; Turbulence models ; Three dimensional computer graphics ; Momentum ; Numerical model ; Three-dimensional modeling ; Turbulence
  7. Source: Scientia Iranica ; Volume 17, Issue 6 B , NOVEMBER-DECEMBER , 2010 , Pages 419-432 ; 10263098 (ISSN)
  8. URL: http://en.journals.sid.ir/ViewPaper.aspx?ID=186692