Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil
The tip leakage vortex (TLV) has aroused great concern for turbomachine performance, stability and noise generation as well as cavitation erosion. To better understand structures and dynamics of the TLV, large-eddy simulation (LES) is coupled with a homogeneous cavitation model to simulate the cavit...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/9/11/1198 |
| _version_ | 1797509762990997504 |
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| author | Linlin Geng Desheng Zhang Jian Chen Xavier Escaler |
| author_facet | Linlin Geng Desheng Zhang Jian Chen Xavier Escaler |
| author_sort | Linlin Geng |
| collection | DOAJ |
| description | The tip leakage vortex (TLV) has aroused great concern for turbomachine performance, stability and noise generation as well as cavitation erosion. To better understand structures and dynamics of the TLV, large-eddy simulation (LES) is coupled with a homogeneous cavitation model to simulate the cavitation flow around a NACA0009 hydrofoil with a given clearance. The numerical results are validated by comparisons with experimental measurements. The results demonstrate that the present LES can well predict the mean behavior of the TLV. By visualizing the mean streamlines and mean streamwise vorticity, it shows that the TLV dominates the end-wall vortex structures, and that the generation and evolution of the other vortices are found to be closely related to the development of the TLV. In addition, as the TLV moves downstream, it undergoes an interesting progression, i.e., the vortex core radius keeps increasing and the axial velocity of vortex center experiences a conversion from jet-like profile to wake-like profile. |
| first_indexed | 2024-03-10T05:22:20Z |
| format | Article |
| id | doaj.art-104ffcabe4db4c6c91f1be986bb51fc3 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T05:22:20Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-104ffcabe4db4c6c91f1be986bb51fc32023-11-22T23:53:14ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-10-01911119810.3390/jmse9111198Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 HydrofoilLinlin Geng0Desheng Zhang1Jian Chen2Xavier Escaler3Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaDepartment of Fluid Mechanics, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, SpainThe tip leakage vortex (TLV) has aroused great concern for turbomachine performance, stability and noise generation as well as cavitation erosion. To better understand structures and dynamics of the TLV, large-eddy simulation (LES) is coupled with a homogeneous cavitation model to simulate the cavitation flow around a NACA0009 hydrofoil with a given clearance. The numerical results are validated by comparisons with experimental measurements. The results demonstrate that the present LES can well predict the mean behavior of the TLV. By visualizing the mean streamlines and mean streamwise vorticity, it shows that the TLV dominates the end-wall vortex structures, and that the generation and evolution of the other vortices are found to be closely related to the development of the TLV. In addition, as the TLV moves downstream, it undergoes an interesting progression, i.e., the vortex core radius keeps increasing and the axial velocity of vortex center experiences a conversion from jet-like profile to wake-like profile.https://www.mdpi.com/2077-1312/9/11/1198tip leakage vortexlarge-eddy simulationvortex structuresvortex coreaxial velocity |
| spellingShingle | Linlin Geng Desheng Zhang Jian Chen Xavier Escaler Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil Journal of Marine Science and Engineering tip leakage vortex large-eddy simulation vortex structures vortex core axial velocity |
| title | Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil |
| title_full | Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil |
| title_fullStr | Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil |
| title_full_unstemmed | Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil |
| title_short | Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil |
| title_sort | large eddy simulation of cavitating tip leakage vortex structures and dynamics around a naca0009 hydrofoil |
| topic | tip leakage vortex large-eddy simulation vortex structures vortex core axial velocity |
| url | https://www.mdpi.com/2077-1312/9/11/1198 |
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