Investigation of aerodynamic design of low pressure turbine at low reynolds number conditions

To investigate the aerodynamic design ideas and concrete methods of high performance Low Pressure Turbine (LPT) at low Reynolds number condition, a new LPT of high load, large chord and proper velocity distribution was designed. The results of 3D viscous numerical simulation show that the efficiency of new LPT decreases 2.3 percent under the low Reynolds number condition, which was compared with that of design point. The results show that increase of flow Reynolds number and decrease of sensitivity of turbine performance to Reynolds number are two key technologies to aerodynamic design of high performance LPT.