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Title: Investigations on the coupling flow between full-scale last-stage steam turbine and low-pressure exhaust hood
Author: Fu, Jing-Lun1; Liu, Jian-Jun1
Source: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
Issued Date: 2015-12-01
Volume: 229, Issue:8, Pages:889-909
Keyword: Steam turbine ; exhaust hood ; full scale ; coupling flow
DOI: 10.1177/0957650915597334
DOC Type: Article
English Abstract: In a condensing steam turbine, the last-stage turbine and the condenser are connected by the low-pressure axial-radial exhaust hood. The exhaust hood has a complex geometry to make the flow change direction by 90 degrees, while guiding the flow from the turbine to the condenser. During the operation, strong flow interactions between the turbine and the exhaust hood cause the flow pattern to become extremely complicated. The purpose of this paper is to investigate the coupling flow between the full-scale last-stage turbine and the low-pressure exhaust hood of a 600MW steam turbine under actual operation conditions. The simulational calculations of the flow through the last stage turbine and the exhaust hood were realized by coupling calculations of turbine stage and exhaust hood in an external iterative manner. Equilibrium wet steam was selected as the flow medium. The coupling flow fields under different operation conditions were simulated and analyzed. It is found that the distributions of the turbine exit flow fields at different circumferential locations vary remarkably. The profiles of swirl angle and total pressure distributions at the turbine outlet change with the decrease of the mass flowrate, which further influence the flow behavior in the hood and lead to the reduction of the performance.
WOS Headings: Science & Technology ; Technology
WOS Subject: Engineering, Mechanical
WOS Subject Extended: Engineering
Indexed Type: SCI
Funder: National Natural Science Foundation of China(50906082 ; 51336007)
Language: 英语
WOS ID: WOS:000365134500007
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112308
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Chinese Acad Sci, Inst Engn Thermophys, Key Lab Adv Energy & Power, Beijing 100190, Peoples R China
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