| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor blade for a first phase of a gas turbine. SOLUTION: This blade 1 has a profile specified by a series of closed intersection curves 20 between the profile itself and planes X, Y positioned at distances Z from the central axis. Each closed curve 20 has a first round end part 21 and a second round end part 22, which connect the trace of a first face 3 with the trace of a second face 5 in depression, and the first end part 21 comes into contact with gas flow in the turbine at first. Each closed curve 20 has an axial chord 40 defined as the maximum distance of the first end part 21 from the second end part 22 along the axis X and has a thickness 30 of the first end part 21 defined as the maximum diameter of a circle inscribed in the first end part 21. Dimensionless thickness 30, namely, divided by the axial chord 40, has a quadric distribution according to a curve of the fourth order along the axis Z. COPYRIGHT: (C)2006,JPO&NCIPI
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