| 摘要 |
PURPOSE:To suppress shock wave thus to improve the flow force performance by jointing the rear side line formed on the trailing edge of blade with the end face line through an arch hving large curvature while the abdomen side line and the end face line through an arch having short curvature. CONSTITUTION:In the trailing edge section 5 at the end of turbine blade 4, it is formed not with single arch but with a rear side line 17 and an abdomen side line 19. The rear side line 17 and the end face line 19 are jointed through an arch 20 having such curvature as not cause stress problem while the abdomen side line 18 and the end face line 19 are jointed through a small arch 21 having such curvature as not cause casting or working problem. Consequently, considerable coarseness can be eliminated from the rear side and abdomen side flowlines 9, 10 to produce weak expansion waves 11, 12, thus to reduce accumulation of compressed wave and to prevent shock waves 13, 14 resulting in improvement of flow force performance. |
