LAUSR

In order to solve these problems, such as excessive fluid velocity, large differences in output for all turbine level and disorder of flow field, variable geometric method was put forward as an improved method for turbine blade. The output performance of last blade and last three blades is studied by changing the stagger angle of blade for 10-stage turbine. The results show that the aerodynamic efficiency was increased by 3.72% for the variable geometry technology used in the last-stage blade. The variable geometry technology was used in last three stages blades of a 10-stage turbine, the aerodynamic efficiency increased by 4.88%, the output performance is more average than before, the fluid velocity in the flow field is reduced, and the phenomenon of dewatering is controlled.