A comparision of numerical analysis using finite difference method with experimental analysis using electrical analogy in two-dim, subsonic, inviscid, incompressible cascade flow is presented. A spline method is taken to supply the improved boundary condition of the cascade surface curvatures. In this paper grid size is constant. But using spline method, a result similar to the solution using variable size grid is obtained.
The experimental work is the electrolytic tank method. The electrolytic tank method of studying potential flow through cascades makes use of the similarity between the equations for the electric field and hydrodynamic field. Using this analogy equipotential lines are obtained and compared with the numerical analysis in incompressible. It is difficult of access to obtain accurate quantitative properties using electrolytic tank but acceptable to compare qualitative properties.
