STRUCTURAL INTEGRITY ASSESSMENT AND ENGINE TEST OF AN ADDITIVE MANUFACTURED FIRST STAGE RING SEGMENT OF A SIEMENS LARGE GAS TURBINE

被引：0

作者：

Ruehmer, Tobias T. ^{[1
]}

Gampe, Uwe ^{[2
]}

Fischer, Kathrin A. ^{[1
]}

Wimmer, Thomas ^{[1
]}

Haberland, Christoph ^{[3
]}

机构：

[1] Siemens AG, Huttenstr 12, D-10553 Berlin, Germany

[2] Tech Univ Dresden, D-01062 Dresden, Germany

[3] Siemens AG, Mellinghofer Str 55, D-45473 Mulheim, Germany

来源：

PROCEEDINGS OF THE ASME TURBO EXPO: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, 2019, VOL 7A | 2019年

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D O I：

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中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The first stage ring segment (RS) of a Siemens large gas turbine has been redesigned for Selective Laser Melting (SLM) in order to reduce the cooling air consumption and to increase the gas turbine efficiency. The material is IN939. Cylindrical specimen for uniaxial tensile, cyclic tests and creep rupture tests have been manufactured by SLM to characterize the material by derivation of stress strain and creep rupture curves. The ring segment has been tested in a real gas turbine. The loading conditions as well as measurement data from thermocouples and dynamic strain gages have been taken as inputfor numerical structural integrity assessment. Permissible service life of the ring segment was evaluated in respect of low cycle fatigue (LCF), high cycle fatigue (HCF) and creep. Results have been compared with the conventional design. Furthermore the hook lock up in the engine was evaluated. The manufacturing quality was ensured through several methods including an optical 3D measuring system and computer tomography, process specimen and flow tests. Post investigations such as cut ups and metallography have also been conducted. The results show that the additive manufactured RS meets the required service lifetime.

引用

页数：10