Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines
This study aims to elucidate the mechanisms by which tip seal leakage flow induces steam excitation, thereby enhancing the operational safety of steam turbines. Using numerical simulations, it investigates the detailed characteristics of the flow field in the turbine tip seal cavity. By introducing...
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| Format: | Article |
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MDPI AG
2025-06-01
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| Series: | Machines |
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| Online Access: | https://www.mdpi.com/2075-1702/13/6/518 |
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| author | Pan Li Huan Wang Haichao Peng Heyong Si Tieliu Jiang |
| author_facet | Pan Li Huan Wang Haichao Peng Heyong Si Tieliu Jiang |
| author_sort | Pan Li |
| collection | DOAJ |
| description | This study aims to elucidate the mechanisms by which tip seal leakage flow induces steam excitation, thereby enhancing the operational safety of steam turbines. Using numerical simulations, it investigates the detailed characteristics of the flow field in the turbine tip seal cavity. By introducing Boundary Vorticity Flux (BVF) into the tip seal flow field, this research explores the relationship between leakage vortex structures in non-uniform flow fields at the blade tip and the resulting steam excitation forces. The results demonstrate that, during eccentric rotor operation, the extent and intensity of vortices within the seal cavity vary, lead to changes in the BVF distribution along the shroud surface, which in turn alter the tangential forces and induce variations in lateral excitation force at the blade tip. Additionally, the non-uniform flow in the tip seal clearance induces circumferential pressure variations across the shroud, leading to adjustments in radial excitation force at the blade tip. |
| format | Article |
| id | doaj-art-2b64f747791b4762b89501157cee7ea8 |
| institution | Kabale University |
| issn | 2075-1702 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj-art-2b64f747791b4762b89501157cee7ea82025-08-20T03:27:40ZengMDPI AGMachines2075-17022025-06-0113651810.3390/machines13060518Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam TurbinesPan Li0Huan Wang1Haichao Peng2Heyong Si3Tieliu Jiang4School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, ChinaSchool of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, ChinaState Grid Songyuan Elect Power Supply Co., Songyuan 138000, ChinaSchool of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, ChinaSchool of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, ChinaThis study aims to elucidate the mechanisms by which tip seal leakage flow induces steam excitation, thereby enhancing the operational safety of steam turbines. Using numerical simulations, it investigates the detailed characteristics of the flow field in the turbine tip seal cavity. By introducing Boundary Vorticity Flux (BVF) into the tip seal flow field, this research explores the relationship between leakage vortex structures in non-uniform flow fields at the blade tip and the resulting steam excitation forces. The results demonstrate that, during eccentric rotor operation, the extent and intensity of vortices within the seal cavity vary, lead to changes in the BVF distribution along the shroud surface, which in turn alter the tangential forces and induce variations in lateral excitation force at the blade tip. Additionally, the non-uniform flow in the tip seal clearance induces circumferential pressure variations across the shroud, leading to adjustments in radial excitation force at the blade tip.https://www.mdpi.com/2075-1702/13/6/518steam turbineblade tip sealsteam excitation forceboundary vorticity fluxstability |
| spellingShingle | Pan Li Huan Wang Haichao Peng Heyong Si Tieliu Jiang Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines Machines steam turbine blade tip seal steam excitation force boundary vorticity flux stability |
| title | Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines |
| title_full | Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines |
| title_fullStr | Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines |
| title_full_unstemmed | Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines |
| title_short | Study on Steam Excitation Forces Induced by Tip Seal Leakage Flow in Steam Turbines |
| title_sort | study on steam excitation forces induced by tip seal leakage flow in steam turbines |
| topic | steam turbine blade tip seal steam excitation force boundary vorticity flux stability |
| url | https://www.mdpi.com/2075-1702/13/6/518 |
| work_keys_str_mv | AT panli studyonsteamexcitationforcesinducedbytipsealleakageflowinsteamturbines AT huanwang studyonsteamexcitationforcesinducedbytipsealleakageflowinsteamturbines AT haichaopeng studyonsteamexcitationforcesinducedbytipsealleakageflowinsteamturbines AT heyongsi studyonsteamexcitationforcesinducedbytipsealleakageflowinsteamturbines AT tieliujiang studyonsteamexcitationforcesinducedbytipsealleakageflowinsteamturbines |