Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modes
To investigate the supercavity geometry and gas flow structure for the supercavities with two closure types under the different flow conditions, an inhomogeneous multiphase model with the SST turbulence model was established, and validated by experimental results. The results show that two distinct...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | International Journal of Naval Architecture and Ocean Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S209267822100025X |
| _version_ | 1818718376582709248 |
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| author | Haiyu Xu Kai Luo Jianjun Dang Daijin Li Chuang Huang |
| author_facet | Haiyu Xu Kai Luo Jianjun Dang Daijin Li Chuang Huang |
| author_sort | Haiyu Xu |
| collection | DOAJ |
| description | To investigate the supercavity geometry and gas flow structure for the supercavities with two closure types under the different flow conditions, an inhomogeneous multiphase model with the SST turbulence model was established, and validated by experimental results. The results show that two distinct regions exist inside the supercavity, which include the downstream flow region along the gas-water interface and the reverse flow region. For the twin-vortex supercavity, the internal gas leaks from the supercavity boundary by two paths: the supercavity surface and the two-vortex tubes. Increasing Froude number leads to more internal gas stripped from the supercavity surface. Two types of gas loss exist for the re-entrant jet supercavity with high Froude number, one type is the steady process of gas loss, and the major gas-leaking path is the supercavity surface rather than supercavity closure region. The other type is the unsteady periodic ejection, and the gas cluster of periodic ejection is merely a small part of the gas stored inside the supercavity. |
| first_indexed | 2024-12-17T19:50:04Z |
| format | Article |
| id | doaj.art-8a4754134b774d828f288546e9f4e9f9 |
| institution | Directory Open Access Journal |
| issn | 2092-6782 |
| language | English |
| last_indexed | 2024-12-17T19:50:04Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Naval Architecture and Ocean Engineering |
| spelling | doaj.art-8a4754134b774d828f288546e9f4e9f92022-12-21T21:34:44ZengElsevierInternational Journal of Naval Architecture and Ocean Engineering2092-67822021-01-0113628640Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modesHaiyu Xu0Kai Luo1Jianjun Dang2Daijin Li3Chuang Huang4School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, ChinaCorresponding author.; School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, ChinaTo investigate the supercavity geometry and gas flow structure for the supercavities with two closure types under the different flow conditions, an inhomogeneous multiphase model with the SST turbulence model was established, and validated by experimental results. The results show that two distinct regions exist inside the supercavity, which include the downstream flow region along the gas-water interface and the reverse flow region. For the twin-vortex supercavity, the internal gas leaks from the supercavity boundary by two paths: the supercavity surface and the two-vortex tubes. Increasing Froude number leads to more internal gas stripped from the supercavity surface. Two types of gas loss exist for the re-entrant jet supercavity with high Froude number, one type is the steady process of gas loss, and the major gas-leaking path is the supercavity surface rather than supercavity closure region. The other type is the unsteady periodic ejection, and the gas cluster of periodic ejection is merely a small part of the gas stored inside the supercavity.http://www.sciencedirect.com/science/article/pii/S209267822100025XVentilated supercavitySupercavity geometrySupercavitation flow structureGas leakage behaviorSupercavity closure modes |
| spellingShingle | Haiyu Xu Kai Luo Jianjun Dang Daijin Li Chuang Huang Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modes International Journal of Naval Architecture and Ocean Engineering Ventilated supercavity Supercavity geometry Supercavitation flow structure Gas leakage behavior Supercavity closure modes |
| title | Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modes |
| title_full | Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modes |
| title_fullStr | Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modes |
| title_full_unstemmed | Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modes |
| title_short | Numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin-vortex and the re-entrant jet modes |
| title_sort | numerical investigation of supercavity geometry and gas leakage behavior for the ventilated supercavities with the twin vortex and the re entrant jet modes |
| topic | Ventilated supercavity Supercavity geometry Supercavitation flow structure Gas leakage behavior Supercavity closure modes |
| url | http://www.sciencedirect.com/science/article/pii/S209267822100025X |
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