Multiphase flow characteristics and gas loss in the shear layer on a ventilated supercavity wall

作者

Wang Zou¹ , Tingxu Liu¹ , Xingqun Gao¹ , Yongkang Shi¹

1. Shanghai Jiao Tong University, Shanghai 200240, China

会议/活动

Chinese Congress of Theoretical and Applied Mechanics -2021+1, November 2022 (虚拟会议)

海报摘要

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.

关键词

Ventilated supercavitating flow, Multi-fluid model, Gas loss, Shear flow

研究领域

Ocean Sciences, Physics

参考文献

暂无数据

基金

1. the National Natural Science Foundation of China (No. 11972228)
2. the University-Industry Collaborative Education Program (No. 202102273002)

补充材料

1. the manuscript   Download
2. The URL and QR code of the video   Download

附加信息

利益冲突

No competing interests were disclosed.

数据可用性声明

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

知识共享许可协议

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.