叶栅端壁附面层及叶片力亏损的数值研究

本文对轴流压气机叶栅端壁附面层各种计算方法进行了研究,基于理论和实验提出一种将叶片力亏损与端壁附面层主流和横流发展相关联的新的叶片力亏损模型。对三种不同叶栅的计算结果表明,采用本文的力亏损模型和端壁附面层计算方法所预测的端壁附面层发展,尤其是叶片力亏损的发展与实验值的一致性较好,表明本文模型通用性、实用性强。 

NUMERICAL STUDY OF END-WALL BOUNDARY LAYER AND BLADE FORCE DEFECT IN CASCADES

A detail research has been completed for calculation of end wall boundary layers within an axial compressor cascade.A new calculation model for blade force defect is proposed,which is associated with development of primary flow and transverse flow.A unique feature of this method lies not only in capability to calculate the development of end wall boundary layers inside the cascade passage without any assumption about the exit of cascade,but also in ability to take into account the influecnce of its tip clearance.The calculational results of three heavily loaded cascades show that this model is superior to other existing models.