In order to achieve high working efficiency, modern gas turbines operate at high temperature which is close to the melting points of metal alloys. However, the support of turbine end suffers the thermal deformation. And the journal center position is also changed due to the effects of high temperature and shaft gravity. Tangential or radial supporting structures, which are composed of supporting struts, diffuser cones, hot and cooling fluid channel, are widely used in gas turbine hot end. Cooling technology is usually used to keep the bearing temperature in a reasonable range to meet requirements of strength and deformation of the supporting struts. In this paper, three major assumptions are proposed: (a) radiation is not considered, (b) cooling flow system is only partially modeled and analysis assumes significantly higher cooling flow that is not typical for current engines, and (c) only steady state heat transfer is considered. And a 3D fluid-solid coupled model based on finite-element method (FEM) is built to analyze the performances of both the tangential and the radial support. The temperature distribution, thermal deformation and stress of supports are obtained from CFD and strength analysis. The results show that either the tangential or radial support is used in a 270MW gas turbine; the thermal stress is about 90.3% of total stress which is produced by both thermal effects and shaft gravity. Comparing to the results from radial supports, it can be seen that the struts stress and position variation of journal center of tangential support are smaller. Due to a rotational effect of the bearing housing caused by the deformation of the tangential struts, the thermal stress in these tangential struts can be relieved to some extent. When both thermal effect and shaft gravity are considered, the stress of each tangential supporting strut is almost uniformly distributed, which is beneficial to the stability of rotor system in the gas turbine.
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ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
June 15–19, 2015
Montreal, Quebec, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5673-4
PROCEEDINGS PAPER
Supporting Structure Performances Analysis of Heavy-Duty Gas Turbine Based on Fluid-Solid Coupling Method
Guohui Xu,
Guohui Xu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Jian Zhou,
Jian Zhou
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Mingjian Lu,
Mingjian Lu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Haipeng Geng,
Haipeng Geng
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Yanhua Sun,
Yanhua Sun
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Lie Yu,
Lie Yu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Lihua Yang,
Lihua Yang
Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Shiquan Zhao,
Shiquan Zhao
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
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Xiaobing Qi,
Xiaobing Qi
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
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Xueyun Liu,
Xueyun Liu
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
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Yu Fang
Yu Fang
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
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Guohui Xu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Jian Zhou
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Mingjian Lu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Haipeng Geng
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Yanhua Sun
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Lie Yu
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Lihua Yang
Xi’an Jiaotong University, Xi’an, Shaanxi, China
Shiquan Zhao
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
Xiaobing Qi
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
Xueyun Liu
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
Yu Fang
DONGFANG Turbine Co. LTD., Deyang, Sichuan, China
Paper No:
GT2015-42098, V05CT18A001; 11 pages
Published Online:
August 12, 2015
Citation
Xu, G, Zhou, J, Lu, M, Geng, H, Sun, Y, Yu, L, Yang, L, Zhao, S, Qi, X, Liu, X, & Fang, Y. "Supporting Structure Performances Analysis of Heavy-Duty Gas Turbine Based on Fluid-Solid Coupling Method." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 5C: Heat Transfer. Montreal, Quebec, Canada. June 15–19, 2015. V05CT18A001. ASME. https://doi.org/10.1115/GT2015-42098
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