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Multiphase flow characteristics and gas loss in the shear layer on a ventilated supercavity wall
PUBLISHED June 30, 2023 (DOI: https://doi.org/10.54985/peeref.2306p7107564)
NOT PEER REVIEWED
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Authors
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Wang Zou1 , Tingxu Liu1 , Xingqun Gao1 , Yongkang Shi1
- Shanghai Jiao Tong University, Shanghai 200240, China
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Conference / event
- Chinese Congress of Theoretical and Applied Mechanics -2021+1, November 2022 (Virtual)
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Poster summary
- Ventilated supercavities are being studied to reduce underwater drag, but maintaining and controlling their stability are challenging. Accurately predicting the supercavity shape under various flow conditions is crucial and the key is to understanding the gas loss law of supercavities. We numerically analyze shear flows on ventilated supercavitaty walls based on the gas–vapor–water multi-fluid model. It is shown that the external shear layer is thinner and has an irregular outer boundary compared to the internal layer. Analysis reveals similar velocity changes along the radial direction in the shear layer for all phases, but gas and water phases show opposite distribution trends. When natural cavitation occurs, vapor accumulates in the head of the supercavity and its velocity is higher than gas velocity and slightly lower than water velocity. Based on these findings, a gas loss model for ventilated supercavitating flows is established and validated.
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Keywords
- Ventilated supercavitating flow, Multi-fluid model, Gas loss, Shear flow
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Research areas
- Ocean Sciences, Physics
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References
- No data provided
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Funding
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- the National Natural Science Foundation of China (No. 11972228)
- the University-Industry Collaborative Education Program (No. 202102273002)
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Additional information
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- Competing interests
- No competing interests were disclosed.
- Data availability statement
- The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.
- Creative Commons license
- Copyright © 2023 Zou et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Zou, W., Liu, T., Gao, X., Shi, Y. Multiphase flow characteristics and gas loss in the shear layer on a ventilated supercavity wall [not peer reviewed]. Peeref 2023 (poster).
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