The Method Researching Of The Runner Hydraulic Design For The Francis Turbine

This paper was based on the applied basic problem of the office of science and technology, Sichuan province. Which is "Design and Research of the Innovative Theory on the New Type Turbine Runner." The task's item number is (04JY029-054) . According to the studying content, we have designed a Francis turbine runner. Which design idea is: Based on the relative stream surface and two types of theory, this paper set up a Francis turbine runner of the quasi-ternary internal mobile computing and blade design of the universal model. And the thickness distribution for the known conditions, the use of weeks to the average treatment methods, three-dimensional Euler equations derived from the surface meridional stream function equations of motion and assume that the blade bone surface for weeks to an average stream surface, using an average of a week to the stream surface and a set of stream surface of the iterative calculation to meet the needs of a given distribution and thickness of the blade has been designed. Using eight-node quadrilateral isoparametric curved element for calculating the discrete region, using Galerkin weighted residual method, surface convection equation set up the finite element equation, using iterative relaxation method; use of a powerful computing capabilities, The calculation results, programming visualization and high efficiency of Matlab programming software, set up by this paper, the model produced a quasi-three-dimensional design program. Finally the method is applied to a Francis turbine runner blades design, calculation results show that the design model according to this article, can be met given the load distribution and thickness distribution of the wheel for the wheel design provides a new and effective The calculation model and method. The design method can also be applied to wheels of flow analysis, wheel retrofit, optimization and other fluid mechanical wheel design is very effective.