叶轮机非定常气动设计的缘线匹配(II)数值研究

Edge matching for unsteady design of turbomachinery (II) Numerical investigations

缘线匹配通过考虑多叶排叶轮机相邻叶排间前排叶片尾缘线与后排叶片前缘线空间相对位置匹配关系来进一步提升叶轮机性能,有潜力使叶轮机非定常设计走向工程实际。以一单级跨声轴流压气机和一单级轴流透平为例,尝试用基元流动展向积分方法和全优化方法改善其性能,从而示例应用缘线匹配的具体方法及前景。结果表明,缘线匹配为叶轮机非定常设计提供了可操作的自由度。

Edge Matching （EM） makes it possible to utilize time-accurate simulation of unsteady flow in daily design of multi blade row turbomachinery. The spatial relation between the trailing edge of one blade and the leading edge of sequent blade is taken into account in improving turbomachinery performance. One single stage transonic axial compressor and one single stage steam turbine are used as examples in using EM in which two implementation methods are involved, i.e. spanwise integration method and full optimization method. Another purpose is to illustrate the potential of EM. Results show that EM does provide unsteady design of turbomachinery an operable degree of freedom.