3-D characteristics of turbulent wakes behind rotor of axial flow low speed compressor stage

The threedimensional unsteady flow field downstream of the rotor in a single-stage low speed axial flow compressor at four operating conditions has been investigated experimentally using both straight and 900 triple split fiber probes with an emphasis on the influence of the compressor load on the rotor wake characteristics. The velocity measurements are decomposed into a time average velocity, a periodic velocity component, and an unresolved velocity component. Results are discussed to understand the flow effect depending on the operation point and particularly near the stability line of a compressor.