关键词: 压气机, 流场测量, 根部间隙, 泄漏流

Abstract:

In order to study the effect of stator hub gap on performance of
the compressor,four “L” type five-hole probes with different lengths and a four-hole
probe were designed.The three-dimensional flow field at five sections in the stator
passages of a two-stage axial compressor was
measured with those probes,driven by a displacement mechanism. Results show that mixing of leakage flow and corner separation is the main cause of loss in stator passages. As inlet flow decreases the initial position of leakage flow and corner separation will be closer to the passage inlet.

Key words: compressor, flow field measurement, hub gap, leakage flow