Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer
The tubeless vortex reducer was used to reduce the pressure drop in a cavity with radial inflow. In previous studies, the mechanism of vortex breakdown in tubeless vortex reducers was not clear, and there was a lack of direct guidance for engineering design. In this paper, we studied the vortex and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-12-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19942060.2022.2091662 |
| _version_ | 1811333743303983104 |
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| author | Wenjie Shen Suofang Wang Xindan Zhang Xiaodi Liang |
| author_facet | Wenjie Shen Suofang Wang Xindan Zhang Xiaodi Liang |
| author_sort | Wenjie Shen |
| collection | DOAJ |
| description | The tubeless vortex reducer was used to reduce the pressure drop in a cavity with radial inflow. In previous studies, the mechanism of vortex breakdown in tubeless vortex reducers was not clear, and there was a lack of direct guidance for engineering design. In this paper, we studied the vortex and pressure in the cavity in detail by large-eddy simulation (LES) and experiments. A mathematical model, which has high applicability and compatibility, was established to guide the pre-design of tubeless vortex reducers. The LES results showed that the high-speed and large-scale vortices broke rapidly at the nozzle inlet and reached the minimum size at the nozzle outlet. Furthermore, the enhancement of vortex in the downstream cavity was restrained. When the rotating speed was relatively low, strong negative vortices formed and the pressure drop increased in the downstream cavity. The experiments showed that the nozzle performance directly affected the flow characteristics and pressure drop in the cavity. Compared with the simple cavity, the tubeless vortex reducer generated lower pressure drop. The average relative error between the mathematical model and the experimental results was only 9.3%. |
| first_indexed | 2024-04-13T16:57:27Z |
| format | Article |
| id | doaj.art-2a7fdd39c7e046b5a3ac9213d44afefa |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-04-13T16:57:27Z |
| publishDate | 2022-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-2a7fdd39c7e046b5a3ac9213d44afefa2022-12-22T02:38:46ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2022-12-011611344136310.1080/19942060.2022.2091662Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducerWenjie Shen0Suofang Wang1Xindan Zhang2Xiaodi Liang3College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People’s Republic of ChinaCollege of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People’s Republic of ChinaCollege of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People’s Republic of ChinaCollege of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People’s Republic of ChinaThe tubeless vortex reducer was used to reduce the pressure drop in a cavity with radial inflow. In previous studies, the mechanism of vortex breakdown in tubeless vortex reducers was not clear, and there was a lack of direct guidance for engineering design. In this paper, we studied the vortex and pressure in the cavity in detail by large-eddy simulation (LES) and experiments. A mathematical model, which has high applicability and compatibility, was established to guide the pre-design of tubeless vortex reducers. The LES results showed that the high-speed and large-scale vortices broke rapidly at the nozzle inlet and reached the minimum size at the nozzle outlet. Furthermore, the enhancement of vortex in the downstream cavity was restrained. When the rotating speed was relatively low, strong negative vortices formed and the pressure drop increased in the downstream cavity. The experiments showed that the nozzle performance directly affected the flow characteristics and pressure drop in the cavity. Compared with the simple cavity, the tubeless vortex reducer generated lower pressure drop. The average relative error between the mathematical model and the experimental results was only 9.3%.https://www.tandfonline.com/doi/10.1080/19942060.2022.2091662Rotating cavityde-swirl nozzlelarge-eddy simulationcoherent structurepressure dropmathematical model |
| spellingShingle | Wenjie Shen Suofang Wang Xindan Zhang Xiaodi Liang Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer Engineering Applications of Computational Fluid Mechanics Rotating cavity de-swirl nozzle large-eddy simulation coherent structure pressure drop mathematical model |
| title | Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer |
| title_full | Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer |
| title_fullStr | Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer |
| title_full_unstemmed | Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer |
| title_short | Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer |
| title_sort | large eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer |
| topic | Rotating cavity de-swirl nozzle large-eddy simulation coherent structure pressure drop mathematical model |
| url | https://www.tandfonline.com/doi/10.1080/19942060.2022.2091662 |
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