Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam Turbine
Steam turbine technology with enhanced flexibility will continue to participate in electric power supply mixes. Last stage blades secure the reliability of a steam turbine and require high precision manufacturing and assembly. This case study presents a statistical analysis of geometric errors of th...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Publishing House of Wrocław Board of Scientific Technical Societies Federation NOT
2022-06-01
|
| Series: | Journal of Machine Engineering |
| Subjects: | |
| Online Access: | http://jmacheng.not.pl/Analysis-of-Geometric-Errors-of-Throat-Sizes-of-Last-Stage-Blades-in-a-Mid-Size-Steam,151118,0,2.html |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850221565656956928 |
|---|---|
| author | Petr Eret Michal Hoznedl |
| author_facet | Petr Eret Michal Hoznedl |
| author_sort | Petr Eret |
| collection | DOAJ |
| description | Steam turbine technology with enhanced flexibility will continue to participate in electric power supply mixes. Last stage blades secure the reliability of a steam turbine and require high precision manufacturing and assembly. This case study presents a statistical analysis of geometric errors of the throat sizes of the last stage blades in a mid-size steam turbine. A 3D optical scanner is employed to capture detailed geometries of rotor blades and a half of assembled nozzle diaphragm. Unrolled cylinder cross-sections are used to evaluate 2D geometrical features such as blade throats and areas at three different diameters, and the results are compared to intended designs. In addition, linear correlations between the throat size and blade pitch, area and trailing edge thickness are established, and blade throat position shifts are quantified. Such a comprehensive study is presented for the first time, and some useful conclusions can be retrieved from this case study. |
| format | Article |
| id | doaj-art-42bbc869d1a243a29935bba59bb06ec2 |
| institution | OA Journals |
| issn | 1895-7595 2391-8071 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Publishing House of Wrocław Board of Scientific Technical Societies Federation NOT |
| record_format | Article |
| series | Journal of Machine Engineering |
| spelling | doaj-art-42bbc869d1a243a29935bba59bb06ec22025-08-20T02:06:42ZengPublishing House of Wrocław Board of Scientific Technical Societies Federation NOTJournal of Machine Engineering1895-75952391-80712022-06-0122313214710.36897/jme/151118151118Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam TurbinePetr Eret0Michal Hoznedl1Dept. of Power System Engineering, Faculty of Mechanical Engineering, University of West Bohemia, Czech RepublicExperimental Research of Flow, Doosan Skoda Power, Czech RepublicSteam turbine technology with enhanced flexibility will continue to participate in electric power supply mixes. Last stage blades secure the reliability of a steam turbine and require high precision manufacturing and assembly. This case study presents a statistical analysis of geometric errors of the throat sizes of the last stage blades in a mid-size steam turbine. A 3D optical scanner is employed to capture detailed geometries of rotor blades and a half of assembled nozzle diaphragm. Unrolled cylinder cross-sections are used to evaluate 2D geometrical features such as blade throats and areas at three different diameters, and the results are compared to intended designs. In addition, linear correlations between the throat size and blade pitch, area and trailing edge thickness are established, and blade throat position shifts are quantified. Such a comprehensive study is presented for the first time, and some useful conclusions can be retrieved from this case study.http://jmacheng.not.pl/Analysis-of-Geometric-Errors-of-Throat-Sizes-of-Last-Stage-Blades-in-a-Mid-Size-Steam,151118,0,2.htmlsteam turbine last stage bladesblade throat3d optical scanninggeometric deviation |
| spellingShingle | Petr Eret Michal Hoznedl Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam Turbine Journal of Machine Engineering steam turbine last stage blades blade throat 3d optical scanning geometric deviation |
| title | Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam Turbine |
| title_full | Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam Turbine |
| title_fullStr | Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam Turbine |
| title_full_unstemmed | Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam Turbine |
| title_short | Analysis of Geometric Errors of Throat Sizes of Last Stage Blades in a Mid-Size Steam Turbine |
| title_sort | analysis of geometric errors of throat sizes of last stage blades in a mid size steam turbine |
| topic | steam turbine last stage blades blade throat 3d optical scanning geometric deviation |
| url | http://jmacheng.not.pl/Analysis-of-Geometric-Errors-of-Throat-Sizes-of-Last-Stage-Blades-in-a-Mid-Size-Steam,151118,0,2.html |
| work_keys_str_mv | AT petreret analysisofgeometricerrorsofthroatsizesoflaststagebladesinamidsizesteamturbine AT michalhoznedl analysisofgeometricerrorsofthroatsizesoflaststagebladesinamidsizesteamturbine |