05 - Propulsion
NUMERICAL AND EXPERIMENTAL STUDY OF THE EFFECT OF CIRCUMFERENTIAL GROOVES ON HPC LAST STAGE PERFORMANCE
V.I. Mileshin¹, A.M. Petrovichev¹, S.I. Baeva¹, V.V. Zhdanov¹; ¹Central Institute of Aviation Motors, Russia
The goal of the work was to design the groove type casing treatment to recover the stall margin and the maximum level of the efficiency, decreased due to a tip clearance increase. The grooves shape and dimensions were selected taking into account manufacturing feasibility. New CT configuration with skewed triangular grooves turned out to be the most effective, which was confirmed experimentally.