关键词: 角区旋涡, 叶尖泄漏涡, 非定常相互作用, SPIV, 压气机

Abstract: SPIV is applied to a large-scale low-speed compressor facility, the instantaneous velocity and vorticity distributions in several cross sections are successfully measured in the tip region of the compressor rotor at near stall condition. Based on the measurement results, the evolution of the tip leakage vortex and the formation of the corner vortex are discussed in the paper. The measurement results show that the corner vortex is a kind of compound vortex, which is composed of multiple vortices developed from the suction surface of the rotor blade. The key mechanism for the generation of the corner vortex is that the rotation of the rotor has different effects on the evolution of positive vortices and negative vortices.

Key words: corner vortex, tip leakage vortex, SPIV, compressor