| 摘要 |
PROBLEM TO BE SOLVED: To provide a blade body of a rotary machine capable of effectively restricting a pressure loss, a gas turbine having the blade body and a method for designing the blade body of the rotary machine.SOLUTION: A blade body 20 comprises a blade main body 25 having a convex rear surface 23 and a concave belly surface 24 between a front edge 21 and a rear edge 22 and a blade end wall 26 to which the end part of the blade main body 25 is connected. A plurality of blade main bodies 25 are arranged in a circumferential direction R, have a main body part 251 and a blade thick part 252 disposed between the main body part 251 and the blade end wall 26 and formed to have a thick blade thickness at the belly surface 24 over an entire one ranging from the front edge 21 to the rear edge 22 as compared with the main body part 251, a belly surface 242 at the blade thick part of the blade thick part 252 is formed as a smooth concave curved surface that is continuous with each of the belly surface 241 of the main body part of the main body part 251 and the surface of the blade end wall 26 in a section crossing at a right angle in a direction along a blade chord and at the same time formed into a smooth concave curved surface continuous to the front edge 21 and the rear edge 22 in a section crossing at a right angle with a blade height direction. |
