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Comparison of Bending and Torsion Deformation Algorithms for Ceramic Core of Hollow Turbine Blade
Pages: 63-68
Year: Issue:  21
Journal: Aeronautical Manufacturing Technology

Keyword:  Ceramic coreBending and torsionSnake-modelSpline-fittingConvex-hull2D-registrationDistance-weight;
Abstract: Ceramic core is used to form the cooling channel of hollow turbine blade in investment casting process. The bending and torsion deformations of ceramic core have direct inlfuence on the wall thickness dimension accuracy of turbine blade. To study bending and torsion deformation of ceramic core generating in manufacturing process, ifrstly, based on the deifnition of bending and torsion deformations for airfoil and the structure characteristics of ceramic core, the al-gorithms for computing bending and torsion deformations of ceramic core are studied, including contour-based methods:Snake-model, spline-iftting method and point-based methods: Convex-hull, 2D-registration, distance-weight method. Sec-ondly, through computing a simulated known bending and twist deformation, these ifve methods are compared. The com-paring results indicate that the accuracy and stability of spline-iftting method is better than other methods.
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