TURBINE BLADE

摘要

A turbine blade in which the crossing point of extensions of the blade inlet angle and the blade outlet angle is located in a position in which the distance between the blade outlet end and a line passing through the crossing point and parallel to the axis of a blade cascade arranged in a circle is more than one-half and less than four-fifths the blade width, and in which the ratio of the narrowest width S1 of a flow channel defined between the back side of the blade in a position in which the line crosses the back side of and the front side of an adjacent blade to the narrowest width S2 of the flow channel at the blade outlet end is 1 ? S1/S2 < 1.1. By this blade profile, the flow velocity differential between the fluid flowing along the front side of the blade and the fluid flowing along the back side of thereof can be reduced.