Abstract
Corner separation is an inherent flow instability phenomenon in a compressor cascade,and its control is an important component of strategies to reduce flow loss and improve the aerodynamic performance of com-pressors. To deepen understanding of flow mechanisms associated with corner separation and techniques for controlling it, three passive control schemes, blended blade and endwall (BBEW),vortex generator (VG) and their compound control scheme,are designed based on the custom-designed compressor cascade. Particle image velocimetry (PIV) is used to measure the velocity distribution at different attack angles and velocities in a low-speed cascade wind tunnel. The experimental results show that the BBEW control cas-cade designed in this paper has limited inhibition on corner separation,and it aggravates the separation under some operating conditions. While the cascade with VG can disturb and break the separated shear layer by the wake vortices,which can promote the mixing of the main flow and low energy fluids, enhance the kinetic energy of the separation zone, and thus effectively restrain the corner separation.
Translated title of the contribution | Experimental investigation of flow control of corner separation in a compressor cascade |
---|---|
Original language | Chinese (Traditional) |
Article number | 20220925 |
Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
Volume | 40 |
Issue number | 5 |
DOIs | |
Publication status | Published - May 2025 |
Externally published | Yes |