TURBINE BLADE WITH LOSS-SUPPRESSING TRAILING EDGE

摘要

A turbine blade (1) with a profile having a blade back-side line (2), a blade front-side line (3), and a blade trailing edge (5) formed by connecting the rear ends of the blade back-side line (2) and the blade front-side line (3) by a curve (4), wherein the curve (4) that forms the blade trailing edge (5) in the profile is formed by connecting a front-side curve portion (4a) that forms an arc having a constant curvature radius and stretching from the rear end of the blade front-side line (3) to a camber line (CL) of the profile, and a front-side curve portion (4a) that stretches from the rear end of the blade back-side line (2) to the camber line (CL) through a region closer to the camber line (CL) than a symmetric curve portion that is line-symmetric to the front-side curve portion (4) with respect to the camber line (CL). It is possible to further improve performance and increase work by reducing velocity distribution defects without causing concern that the blade weight may increase and an influence may be exerted on structural design while ensuring strength.