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Video: Successful Full Load Tests For Additively Manufactured Gas Turbine Blades
The company reviewed several AM-made turbine blades with conventional blade designs. The components were installed in an industrial gas turbine of the type SGT-400 with an output of 13 megawatts (MW) and 13,000 min -1and exposed to temperatures above 1,250 ° C. Siemens also tested a new blade design made with AM technology with a completely revised and improved internal cooling geometry. The blades used were manufactured by Materials Solutions, the recently acquired company in Worcester, Great Britain. Materials Solutions specializes in the manufacture of high-performance components for high-temperature applications in turbomachinery where accuracy, surface quality and the highest material quality are crucial for the performance of the components. The investigations were carried out in the Siemens test center for industrial gas turbines in Lincoln, Great Britain.
The printed turbine blades are made of a powdery, high temperature resistant super alloy with polycrystalline nickel. The blades thus resist the high pressure and the enormous temperatures and centrifugal forces that arise during turbine operation. At full load, each of the blades rotates at a speed of over 1,600 km / h and carries a load of 11 t, which corresponds to the weight of a fully loaded London double-decker bus. In addition, the blades are surrounded by 1,250 ° C hot gas and are “cooled” with air that is over 400 ° C hot. The new blade design tested in Lincoln offers improved cooling properties. This can further increase the efficiency of Siemens gas turbines.The successful test of the advanced blade design is another step on the way for Siemens to exploit the full potential of AM.
Siemens uses AM technology to a large extent for the rapid creation of prototypes and has already introduced series-ready solutions for components in the compression and combustion system of gas turbines. In February last year, Siemens opened a new production facility for 3D printing components in Finspang, Sweden. Since July 2016, the first component made with 3D printing for a large Siemens gas turbine has been successfully in commercial operation. (qui)