Turbine blade

摘要

A turbine blade of a low blade profile loss with a crossing point of an inlet angle alpha 1 an outlet angle alpha 2 being located in a position in which a distance between a crossing point of the outlet end of the blade is greater than one-half of the blade width Lax, with the inlet angle alpha 1 being in the range of 35 DEG -40 DEG and the outlet angle alpha 2 being in the range of 25 DEG -28 DEG . A ratio of a narrowest width S2 of the flow channel at the blade outlet end to a narrowest width S1 of a flow channel defined between a backside of the blade in an area of the crossing point and a front side of adjacent blade lies in the range of 0.81-0.96. A ratio of a distance Lax to a blade width Lax is in the range of 0.5-0.54, with a ratio of a distance Lm from an outlet end of the blade to the blade width Lax being in a range of 0.75-0.89. A ratio of a distance from the maximum projecting point to a line connecting to the outlet end of adjacent blades is in a range of 0.6-0.66. By virtue of the blade profile, the flow velocity differential between the fluid flowing along the front side of the blade and the fluid flowing along the backside of the blade can thereby be reduced.