Effect of hub-shape contouring on the corner blockage of compressor stator cascade

After analyzing the mechanism of the end wall blockage from stator corner flow separation in compressor,the hub-shape contouring was presented in this paper.The RANS(Reynolds-averaged Navier-Stokes) numerical calculations of real cases of compressor stator show that modifying hub shape can depress efficiently the corner flow separation so as to decrease end wall blockage.Subsequently,the corner blockage of the outlet of stator cascade was decreased by 20.4% and the total pressure recovery coefficient of 10% blade height was increased from 0.89 to 0.948 by the concave profile near the separation point of stator end wall.