| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase of air supplying noise and reduction of an efficiency by suppressing separation of air in an impeller 4 of a centrifugal turbo air machine. SOLUTION: At least one of a shroud Sh and a hub HU of the impeller 4 is formed so as to form a surface between blades BL which are disposed adjacently to each other as an inclining surface, and thereby, it is constituted in a step shape so as to contract a separation region of air. |
