NDLI: Turbulent flow computation through a model Francis turbine and its performance prediction

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Turbulent flow computation through a model Francis turbine and its performance prediction

Content Provider	Scilit
Author	Wu, Y. Liu, S. Wu, X. Dou, H. Zhang, L. Tao, X.
Copyright Year	2010
Description	Journal: Iop Conference Series: Earth and Environmental Science In this paper an improved k–ω turbulence model is proposed, which brings the nonlinear term of the mean fluid flow transition to the ω equation in the original k–ω model of Wilcox. Based on the improved k–ω turbulence model, three dimensional turbulent flow computation is carried out through the whole flow passage including the spiral casing, stay vanes, guide vanes, runner and draft tube of a model Francis turbine. In calculation the direct coupling method is used to solve the RANS turbulent flow governing equations for the Francis model turbine by Ansys CFX software. Since the feasibility of the improved k–ω turbulence model to hydro-turbine performance prediction is the present main concern, its validation is conducted by the steady flow simulation. Comparisons of the computational results on energy characteristics with test data and with different turbulence models at different flow rate cases indicate that the present method has sufficient potential to simulate the turbulent flow in hydraulic turbines and to predict their performances.
Related Links	http://iopscience.iop.org/article/10.1088/1755-1315/12/1/012004/pdf
ISSN	17551307
e-ISSN	17551315
DOI	10.1088/1755-1315/12/1/012004
Journal	Iop Conference Series: Earth and Environmental Science
Issue Number	1
Volume Number	12
Language	English
Publisher	IOP Publishing
Publisher Date	2010-08-01
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Earth and Environmental Science Three Dimensional
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Physics and Astronomy Environmental Science

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