Study of Multi-Stage Test Turbine and Numerical Calculation

To improve the aerodynamic performance of flow path for steam turbines, three-stage air turbine experimental test rig is designed and established at Dongfang Steam Turbine Co. Ltd. The experimental test rig is described at first including the wind regime system, controlling system, measurement system and experimental body. The hydraulic dynamometer and torquemeter are used to measure the output power of the experimental turbine stages. Advanced and accurate pressure and temperature measurement equipments and corresponding displacement device are utilized to obtain the aerodynamic parameters of interstage passage flow. The modeling three-stage turbines according to steam turbines are experimentally measured to obtain the aerodynamic performance and flow fields, as well as demonstrate the accurate and reliability of the air turbine experimental test rig. In addition, three-dimensional Reynolds-Averaged Navier-Stokes (RANS) and S-A one equation turbulent model is also used to obtain the flow characteristics of the experimental turbine stage at the measurement flow conditions. The repeatability of the establishment of air turbine experimental test rig is demonstrated according to two times measurements results. The developed three-stage air turbine experimental test rig can be able to support high reliability of the measurement and verification tool to obtain the aerodynamic performance and flow fields for steam turbines manufactured by Dongfang Steam Turbine Co. Ltd..