【摘要】 目前叶轮机械内的完全三元流动解法大都立足于吴仲华教授的两类流面理论。本文澄清了完全三元解精度的概念,讨论了求解亚音速流场时边界条件的提法,同时给出了一个边界条件提法的新建议。分析表明,只有当两类流面的边界条件是在严格满足三元方程意义下的完全相容时,三元流场解的精度才可以收敛到误差小于任意规定的小量。结合本文分析,对1978年以来国内外开始发表的叶轮机械完全三元流动解法进行了初步的比较和评价。更多还原

【Abstract】 At present, most of the methods for solving the complete three-dimensional flow in turbomachinery have their foothold on Wu’s theory of two families of stream-surfaces. In this paper the concept of the accuracy of the complete three-dimensional solution is clarified. The specification of boundary conditions is discussed for the subsonic case and a new suggestion for giving the boundary condition is presented. It is shown, that only if the boundary conditions of the two families of streamsurfaces are fully compatible in the sense of rigorously satisfying the three-dimensional equations, would the complete three-dimensional flow solution converge to with in an error less than any specified small value. In connection with the analysis of this paper some preliminary comparison and evaluation have been made with regard to the methods for solving complete three-dimensional flow in turbomachinery published since 1978.更多还原