Effects of Reynolds numbers,free stream turbulence intensities(FSTI) and angle of attack on the steady boundary layer development of an ultra-high-lift low-pressure turbine blade were investigated.The three different types of passive separation control devices,which were dimple,cylindrical wire and rectangular trip,were investigated to further improve the blade performance.Numerical simulation results show that:as the Reynolds increases the profile loss decreases;as the FSTI increases,the profile loss decre...