Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating
The secondary water droplets in the steam turbine wet steam stage are easy to cause water erosion damage to the rotor cascade, and there is a large speed slip between the main steam flow and the secondary water droplets, which will seriously affect the safe and stable operation and reduce the effici...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23003362 |
| _version_ | 1797833614281408512 |
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| author | Xu Han Jiandong Guan Qiuliang Zhu Zhengqi Chen Bochuan Yao Wensheng Zhao Zhonghe Han |
| author_facet | Xu Han Jiandong Guan Qiuliang Zhu Zhengqi Chen Bochuan Yao Wensheng Zhao Zhonghe Han |
| author_sort | Xu Han |
| collection | DOAJ |
| description | The secondary water droplets in the steam turbine wet steam stage are easy to cause water erosion damage to the rotor cascade, and there is a large speed slip between the main steam flow and the secondary water droplets, which will seriously affect the safe and stable operation and reduce the efficiency of the steam turbine. Secondary water droplets are formed when the water film deposited on the stator blade surface falls off at the trailing edge. Therefore, controlling the formation of a water film on the stator blade surface plays an important role in improving the efficiency and safety of the steam turbine wet steam stage. Based on the current research situation at home and abroad, taking the Dykas cascade as the research object, it is found that the covering area of dry steam film on blade surface expands with the increase of temperature and flow of hot steam inlet. With the increase of hot steam back-pressure, the wetness of blade surface increases. When the average heat flux on the blade surface reaches 5000W/m2, there will be no water film falling off the blade surface. By orthogonal test, the expression between the average heat flux on the blade surface, the inlet temperature, the flow rate and the back-pressure was obtained. The research results can provide reference for the parameter design of steam turbine hollow stator heating dehumidification. |
| first_indexed | 2024-04-09T14:25:57Z |
| format | Article |
| id | doaj.art-449347d70db04d2cb8450fb014a4bf03 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-09T14:25:57Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-449347d70db04d2cb8450fb014a4bf032023-05-04T04:12:27ZengElsevierCase Studies in Thermal Engineering2214-157X2023-06-0146103030Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heatingXu Han0Jiandong Guan1Qiuliang Zhu2Zhengqi Chen3Bochuan Yao4Wensheng Zhao5Zhonghe Han6Corresponding author.; Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding, 071003, Hebei, ChinaHebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding, 071003, Hebei, ChinaHebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding, 071003, Hebei, ChinaHebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding, 071003, Hebei, ChinaHebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding, 071003, Hebei, ChinaHebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding, 071003, Hebei, ChinaHebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding, 071003, Hebei, ChinaThe secondary water droplets in the steam turbine wet steam stage are easy to cause water erosion damage to the rotor cascade, and there is a large speed slip between the main steam flow and the secondary water droplets, which will seriously affect the safe and stable operation and reduce the efficiency of the steam turbine. Secondary water droplets are formed when the water film deposited on the stator blade surface falls off at the trailing edge. Therefore, controlling the formation of a water film on the stator blade surface plays an important role in improving the efficiency and safety of the steam turbine wet steam stage. Based on the current research situation at home and abroad, taking the Dykas cascade as the research object, it is found that the covering area of dry steam film on blade surface expands with the increase of temperature and flow of hot steam inlet. With the increase of hot steam back-pressure, the wetness of blade surface increases. When the average heat flux on the blade surface reaches 5000W/m2, there will be no water film falling off the blade surface. By orthogonal test, the expression between the average heat flux on the blade surface, the inlet temperature, the flow rate and the back-pressure was obtained. The research results can provide reference for the parameter design of steam turbine hollow stator heating dehumidification.http://www.sciencedirect.com/science/article/pii/S2214157X23003362Wet steamCondensation flowHollow statorOrthogonal testSteam membrane |
| spellingShingle | Xu Han Jiandong Guan Qiuliang Zhu Zhengqi Chen Bochuan Yao Wensheng Zhao Zhonghe Han Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating Case Studies in Thermal Engineering Wet steam Condensation flow Hollow stator Orthogonal test Steam membrane |
| title | Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating |
| title_full | Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating |
| title_fullStr | Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating |
| title_full_unstemmed | Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating |
| title_short | Research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating |
| title_sort | research on dehumidification optimization of steam turbine wet steam stage hollow stator cascade heating |
| topic | Wet steam Condensation flow Hollow stator Orthogonal test Steam membrane |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23003362 |
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