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一、前言 在三元流动通用理论的基础上,目前叶轮机械的设计已普遍采用方便可靠的准三元设计方法。叶片造型作为设计过程中十分重要的一步,其方法也在不断改进。文献[2,3]等提出和发展了的选定流线级数展开法有效地克服了传统的几何造型中的许多缺点,已经在很多方面应用于工程实践。但在迴转面上的气动造型计算中,还始终存在一个尚待解决的问题,这就是由于级数展开法造型计算完全依赖于S_(2m)计算所提供的中心流线形状
I. Introduction On the basis of the general theory of ternary flow, the design of impeller has generally adopted the convenient and reliable quasi-ternary design method. Blade modeling as a very important step in the design process, its methods are also constantly improving. The selected streamline series expansion method proposed and developed in [2] and [3] has effectively overcome many shortcomings in the traditional geometric modeling and has been applied in engineering practice in many aspects. However, there still remains a problem that remains to be solved in the aerodynamic modeling of the revolving surface. This is because the method of series expansion modeling relies entirely on the shape of the central streamline provided by the S 2m calculation