Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter
As hydrodynamic torque converter developing towards higher power density, leading to severe cavitation in the internal viscous oil, which adversely impacts performance and energy efficiency. This study introduces a novel borescope observation technology for visualizing cavitation in hydrodynamic tor...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016824015990 |
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| author | Jiahua Zhang Qingdong Yan Zhifang Ke Haoyuan Wang Boo Cheong Khoo Cheng Liu Meng Guo Wei Wei |
| author_facet | Jiahua Zhang Qingdong Yan Zhifang Ke Haoyuan Wang Boo Cheong Khoo Cheng Liu Meng Guo Wei Wei |
| author_sort | Jiahua Zhang |
| collection | DOAJ |
| description | As hydrodynamic torque converter developing towards higher power density, leading to severe cavitation in the internal viscous oil, which adversely impacts performance and energy efficiency. This study introduces a novel borescope observation technology for visualizing cavitation in hydrodynamic torque converter. Utilizing this visualization approach alongside numerical calculation method, the research investigates transient cavitation phenomena within the torque converter, with a particular focus on the stator flow field. The development of a stress blended eddy simulation model for cavitation flow allows for an in-depth examination of the interaction between cavitation and vortex within the 3D enclosed flow field, elucidating the transient mass transfer process. Visualization successfully captures attached cavitation at the stator blade leading edge revealing a decrease in cavitation extent with increasing speed ratio. CFD simulations incorporating cavitation accurately predict the hydrodynamic performance, highlighting the significant impact of cavitation on performance metrics such as capacity factor and torque ratio. Identifying the critical cavitation number for torque converter underscores the adverse effects of cavitation on performance below this threshold. This comprehensive analysis, combining visualization and simulation, offers valuable insights into cavitation dynamics within hydrodynamic torque converter, laying a foundation for further optimization of flow mechanisms and performance improvement. |
| format | Article |
| id | doaj-art-87b10bc904a94fe7b66bcc89e1869099 |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-87b10bc904a94fe7b66bcc89e18690992024-12-12T05:21:05ZengElsevierAlexandria Engineering Journal1110-01682025-02-01114663680Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converterJiahua Zhang0Qingdong Yan1Zhifang Ke2Haoyuan Wang3Boo Cheong Khoo4Cheng Liu5Meng Guo6Wei Wei7School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China; Department of Mechanical Engineering, National University of Singapore 117575, SingaporeSchool of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China; Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250300, China; Corresponding authors at: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaDepartment of Mechanical Engineering, National University of Singapore 117575, SingaporeSchool of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China; Yangtze Delta Reg Acad, Beijing Institute of Technology, Jiaxing 314000, China; Corresponding authors at: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.Yangtze Delta Reg Acad, Beijing Institute of Technology, Jiaxing 314000, ChinaSchool of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaAs hydrodynamic torque converter developing towards higher power density, leading to severe cavitation in the internal viscous oil, which adversely impacts performance and energy efficiency. This study introduces a novel borescope observation technology for visualizing cavitation in hydrodynamic torque converter. Utilizing this visualization approach alongside numerical calculation method, the research investigates transient cavitation phenomena within the torque converter, with a particular focus on the stator flow field. The development of a stress blended eddy simulation model for cavitation flow allows for an in-depth examination of the interaction between cavitation and vortex within the 3D enclosed flow field, elucidating the transient mass transfer process. Visualization successfully captures attached cavitation at the stator blade leading edge revealing a decrease in cavitation extent with increasing speed ratio. CFD simulations incorporating cavitation accurately predict the hydrodynamic performance, highlighting the significant impact of cavitation on performance metrics such as capacity factor and torque ratio. Identifying the critical cavitation number for torque converter underscores the adverse effects of cavitation on performance below this threshold. This comprehensive analysis, combining visualization and simulation, offers valuable insights into cavitation dynamics within hydrodynamic torque converter, laying a foundation for further optimization of flow mechanisms and performance improvement.http://www.sciencedirect.com/science/article/pii/S1110016824015990Hydrodynamic torque converterCavitationFlow visualizationStress blended eddy simulationViscous oil |
| spellingShingle | Jiahua Zhang Qingdong Yan Zhifang Ke Haoyuan Wang Boo Cheong Khoo Cheng Liu Meng Guo Wei Wei Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter Alexandria Engineering Journal Hydrodynamic torque converter Cavitation Flow visualization Stress blended eddy simulation Viscous oil |
| title | Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter |
| title_full | Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter |
| title_fullStr | Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter |
| title_full_unstemmed | Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter |
| title_short | Stress-blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter |
| title_sort | stress blended eddy simulation and visualization validation of unsteady viscous oil cavitation in hydrodynamic torque converter |
| topic | Hydrodynamic torque converter Cavitation Flow visualization Stress blended eddy simulation Viscous oil |
| url | http://www.sciencedirect.com/science/article/pii/S1110016824015990 |
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