Session: 35-18 Turbine Methods 2

Paper Number: 103771

103771 - Validation of Additively Manufactured Turbine's Hot Gas Path Components Under Engine Environment 

Gas turbine industry is being continuously challenged by requirements for legislations on pollutants, life cycle cost and reliability. The technology development has a long history, nowadays design and manufacturing approaches have been established and best practices have been set up. Under such conditions Additive Manufacturing (AM) brings window of opportunities for further improvement of gas turbine components.

This paper provides an overview for the ongoing development activities for hot turbine parts at Siemens Energy. The scope includes Turbine Vane stage 1, Stator Heat Shield stage 1 and Turbine Vanes stage 2. Baseline vanes and heat shield were cast parts with brazed impingement inserts. This led to limitations for aerodynamic, thermal and mechanical integrity disciplines. AM allowed to utilize design features which were not possible before. AM enables precise, even and more efficient cooling of the components compared to conventional manufacturing. One of the key features is that the new cooling scheme incorporates specific AM cooling design (in-wall cooling channels) in combination with conventional ones (impingement cooling, pin-fins, etc.), while being produced as single piece.

AM allowed to proceed with rapid prototyping approach. Turbine vanes and heat shield were printed, instrumented and prepared for thermal validation at full-scale machine test using SGT-800 engine facility in Finspång, Sweden. Temperature sensitive thermo-crystals and thermocouples were used for a complete mapping of thermal state. Measurement results showed good agreement with calculation models. This validation program became manageable within limited timeline only with AM.

The development of hot turbine vane is in line with Siemens Energy roadmap and supports the strategy for design validation and further commercial release of AM components.

Presenting Author: Lieke Wang Siemens Energy

Presenting Author Biography: Very experienced Gas turbine engineer with a MSc in Thermal engineering and Ph.D in Heat Transfer from Lunds University in Sweden. Working with R&D and Siemens Energy since 2004 in different positions as Turbine Heat transfer Expert, global technology lead in Additive manufacturing and recent team lead in Additive manufacturing design & Methods.

Authors:

Martin Lindbäck Siemens-Energy
Karin Frankolin Siemens-Energy
Erika Tuneskog Siemens-Energy
Björn Karlsson Siemens-Energy
Lieke Wang Siemens Energy