非定常环境下叶栅性能的数值研究

NUMERICAL STUDIES ABOUT THE AERODYNAMIC PERFORMANCE OF CASCADES IN UNSTEADY ENVIRONMENT

本文采用数值方法对叶轮机基元非定常流和排间匹配进行深入研究。结果表明流动非定常性产生额外损失,滞回现象存在于叶轮机中。而考虑基元非定常流动的叶型设计和排间缘线匹配技术将是未来叶轮机非定常气动设计的核心。

Numerical studies about cascade unsteady flow and the edge-matching technique are presented in this paper. The results indicate that the flow unsteadiness bring out extra losses, and time lag phenomena are evident in many circumstances. The blade design with consideration of flow unsteadiness and the edge matching will be the hard-core of unsteady design of turbomachinery.