The low pressure end of a multi-stage steam turbine presents many technical challenges. Developing high efficiency blading that is acceptable both aerodynamically and mechanically requires integrated design analysis.
A turbine end-user wanted to optimize the performance of one of his turbines, and submitted the last stage of his steam turbine for analysis and optimization. The stage was analyzed using CFX software which employed real gas properties in order to correctly model the thermodynamic properties of steam.
Figure 1. Original Design.
A compound-leaned stator design was developed to replace the original stator. This new design reduced transonic losses and provided improved loading from hub to shroud. Using ANSYS FEA software and CFX CFD software a new rotor was also designed and optimized aerodynamically as well as mechanically.
Figure 2. Redesign.
Excessive motion by the discharge piping of a petrochemical ammonia reciprocating compressor startled the operators.
Troubleshooting a new oil tanker pumping station in Colombia consisting of 4 screw pumps. Specialized testing revealed that piping natural frequencies were to blame.