| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an impeller and a rotary machine suppressing a decrease in efficiency and a stall caused by the enlargement of a boundary layer on the hub surface of an inlet on a vacuum surface side when an inflow rate is reduced. <P>SOLUTION: In the impeller 1 of the rotary machine, a flow direction is changed from the axial direction to the radial direction from the radially inside of a fluid flow passage 10 toward the radially outside thereof. The impeller is equipped with: the hub surface 4; a pressure surface p; and the vacuum surface n, which compose the fluid flow passage 10. A swelling part b swelling toward the inside of the fluid flow passage 10 is formed in a corner 12 in the vicinity of the inlet 6 of the fluid flow passage 10 in the corner 12 where the pressure surface p and hub surface 4 are brought into contact with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT |
