ターボ機械用3次元翼間格子生成手法の開発

概要

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A method of generating high quality three-dimensional grids for cascade flow analysis is developed. The method can be applied to various turbomachinery blades, such as axial, mixed and radial flow types. It has the following. (1) Because three-dimensional grids are obtained by stacking two-dimensional cascade grids on flow surface of revolution, grids can be generated by the same method for various blades types. (2) Because suitable grid topology is selected according to blade shapes, high quality cascade grids can be generated for various blades shapes. (3) Because grids are controlled by solving a system of elliptic partial differential equations on flow surface of revolution, grids which satisfy the following two conditions can be generated. The first condition is a specific spacing between mesh points and orthogonality along mesh lines intersecting the blade surface. The second condition is a continuity of spacing between mesh points and angles of mesh lines over the regions. The grids generated by this method are applied to quasi-3D cascade flow analysis and good convergence of the calculation is confirmed.
1999-10-25