Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing Robot
In order to adhere to the wall stably in an underwater environment, a vortex suction cup that injects high-pressure water inside via two axisymmetrically side-distributed inlets to create a negative pressure area in the center is the necessary component for the underwater climbing robot (UCR). Howev...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/1/70 |
| _version_ | 1797492932384653312 |
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| author | Yibing Zhao Canjun Yang Yanhu Chen Jia Li Siyue Liu Guoyun Ye |
| author_facet | Yibing Zhao Canjun Yang Yanhu Chen Jia Li Siyue Liu Guoyun Ye |
| author_sort | Yibing Zhao |
| collection | DOAJ |
| description | In order to adhere to the wall stably in an underwater environment, a vortex suction cup that injects high-pressure water inside via two axisymmetrically side-distributed inlets to create a negative pressure area in the center is the necessary component for the underwater climbing robot (UCR). However, the suction force of this vortex suction cup is reduced and periodically unstable due to unstable cavitation. The aim of this paper is to propose a cavitation reduction optimization method for vortex suction cups and to verify the effectiveness of the optimization. Analyses of this vortex flow, including streamlines, pressure, and cavitation number fluctuations, were carried out by the introduced computational fluid dynamics (CFD) simulating methods based on the multiphase RNG <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>k</mi><mo>−</mo><mi>ε</mi></mrow></semantics></math></inline-formula> model to study the periodic fluctuations of the suction force of the original suction cup and the optimized ones. Force measurement and vortex observation experiments were conducted to compare the suction force of the original vortex suction cup and the optimized suction cup, as well as the cavitation and pressure fluctuation phenomenon. Results of simulation and experiments prove the existence of the effect of vortex cavitation on the suction performance and verify the rationality of optimization as well. |
| first_indexed | 2024-03-10T01:11:47Z |
| format | Article |
| id | doaj.art-e7b160da27de48e39bb6d42dc9e381c1 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T01:11:47Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-e7b160da27de48e39bb6d42dc9e381c12023-11-23T14:16:31ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-01-011017010.3390/jmse10010070Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing RobotYibing Zhao0Canjun Yang1Yanhu Chen2Jia Li3Siyue Liu4Guoyun Ye5The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaThe State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaThe State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaThe State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaThe State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaThe State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaIn order to adhere to the wall stably in an underwater environment, a vortex suction cup that injects high-pressure water inside via two axisymmetrically side-distributed inlets to create a negative pressure area in the center is the necessary component for the underwater climbing robot (UCR). However, the suction force of this vortex suction cup is reduced and periodically unstable due to unstable cavitation. The aim of this paper is to propose a cavitation reduction optimization method for vortex suction cups and to verify the effectiveness of the optimization. Analyses of this vortex flow, including streamlines, pressure, and cavitation number fluctuations, were carried out by the introduced computational fluid dynamics (CFD) simulating methods based on the multiphase RNG <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>k</mi><mo>−</mo><mi>ε</mi></mrow></semantics></math></inline-formula> model to study the periodic fluctuations of the suction force of the original suction cup and the optimized ones. Force measurement and vortex observation experiments were conducted to compare the suction force of the original vortex suction cup and the optimized suction cup, as well as the cavitation and pressure fluctuation phenomenon. Results of simulation and experiments prove the existence of the effect of vortex cavitation on the suction performance and verify the rationality of optimization as well.https://www.mdpi.com/2077-1312/10/1/70vortex suction cupforce measurement and vortex observation experimentcomputational fluid dynamicscavitating vortex flowaxial pressure fluctuationoptimized suction cup |
| spellingShingle | Yibing Zhao Canjun Yang Yanhu Chen Jia Li Siyue Liu Guoyun Ye Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing Robot Journal of Marine Science and Engineering vortex suction cup force measurement and vortex observation experiment computational fluid dynamics cavitating vortex flow axial pressure fluctuation optimized suction cup |
| title | Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing Robot |
| title_full | Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing Robot |
| title_fullStr | Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing Robot |
| title_full_unstemmed | Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing Robot |
| title_short | Study on the Optimal Design for Cavitation Reduction in the Vortex Suction Cup for Underwater Climbing Robot |
| title_sort | study on the optimal design for cavitation reduction in the vortex suction cup for underwater climbing robot |
| topic | vortex suction cup force measurement and vortex observation experiment computational fluid dynamics cavitating vortex flow axial pressure fluctuation optimized suction cup |
| url | https://www.mdpi.com/2077-1312/10/1/70 |
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