Study on the influence of casing bionic chamber on the performance of a compressor cascade

Abstract

This paper introduces a casing bionic chamber structure into the transonic compressor, inspired by the airflow control mechanisms observed in dragonfly wings. Numerical simulations are employed to examine how variations in the height and placement of the casing bionic chamber affect compressor performance and flow field structure. The results indicate that the trapped vortex generated by the casing bionic chamber increases the airflow resistance near the casing, reduces the clearance leakage flow, and suppresses the influence of the leakage vortex along the pitchwise direction. The optimal placement for the casing bionic chamber is near the starting position of the leakage vortex. The inhibition of the clearance leakage is enhanced and then weakened with the increased chamber height. When the chamber is located near the leading edge to the trailing edge, with a height equal to 0.6% of the blade height, the leakage flow rate is reduced by 1.82%.