论文部分内容阅读
引入非正交曲线坐标系,克服反问题或混合问题所特有的求解域内边界未定的难点,本文建立转轮内部完全三维不可压缩流动问题(正问题、反问题以及混合问题)的通用数学模型.来用有限元技术并结合有限体积法,建立该三类流动问题的有限元统一解法,将三维正问题分析、叶片的完全三维设计以及三维叶片局部改型融合于同一种计算方法.
The non-orthogonal curvilinear coordinate system is introduced to overcome the indefinite difficulties of solving the in-domain boundary problems which are inverse or mixed problems. In this paper, a general mathematical model of the complete three-dimensional incompressible flow problem in the runner is established. (Positive, inverse and mixed problems). The finite element method and the finite volume method are used to establish the finite element unified solution of the three kinds of flow problems. The three-dimensional positive problem analysis, the complete three-dimensional design of the blade and the three-dimensional partial modification of the blade are integrated into the same calculation method.