压气机转子尾迹三维紊流特性分析

根据单转子压气机和单级压气机在设计状态和近失速状态转子出口流场的详细测量数据，分析了这两种试件在不同状态、不同叶高情况下转子尾迹的三维素流特性。设计状态除端壁区外；转子各叶高尾迹的速度型很相似，尾迹宽度沿叶高基本相同．近失速状态转子尾迹明显变宽，且沿叶高变化不均匀，这主要决定于吸力面附面层的增长，另一方面尾迹内紊流强度增强，吸力面一侧的紊流强度高于压力面一侧。本文对转子尾迹的目相似定律进行了检验和改进。

EXPERIMENTAL INVESTIGATION OF THREE-DIMENSIONAL CHARACTERISTICS OF TURBULENT WAKES OF COMPRESSOR ROTORS

This paper presents experimental investigations of the characteristics of three-dimensional turbulent wakes of both isolated compressor rotor and single-stage compressor rotor. The wakes were measured from hub to tip using a single-slam hot-wire in both design and near stall conditions. In design condition, the velocity profiles of the wakes are very similar exceptnear the endwall. In near stall condition, the wakes become wider, mainly resulting from the development of the boundary layer on the suction surface, while the turbulence intensities, especial the radial component, increase rapidly. The similarity of velocity profiles in theouter region of wakes can not follow the Gaussian function very well. It is improved and confirmed with experimental data in this paper.