| Autor: |
Lin LU, Zhe YANG, Kaimin CHEN, Yongdong CHENG, Shuai YANG |
| Jazyk: |
čínština |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
水下无人系统学报, Vol 32, Iss 3, Pp 474-481 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2096-3920 |
| DOI: |
10.11993/j.issn.2096-3920.2024-0027 |
| Popis: |
For the water entry problem of supercavitating cylinders in polar environments, a numerical simulation method for the water entry of the cylinder under ice hole constraint was established based on the Reynolds time-averaged Navier-Stokes equations, volume of fluid model, and overlapping mesh technique. On this basis, the simulation of the water entry process of the cylinder through the ice hole at different water entry speeds was carried out, and the cavity evolution and load characteristics of the cylinder in the water entry process were analyzed. The results show that ice hole constraint restricts the flow of water inside the ice hole, which in turn alters the surface splashing and the shape of the cavity wall, thus delaying the surface closing of the cavity. The limiting effect of the ice hole constraint on the cavity shape is essentially the same as the water entry speed increases. The cylinder head appears to have a larger area of high pressure, showing an asymmetric distribution. In addition, the ice hole constraint increases the water entry impact load of the cylinder, which accelerates the underwater speed decay of the cylinder and contributes to a larger deflection angle of the cylinder than in the ice-free condition. The research results can provide some reference for the water entry stability of polar supercavitating weapons. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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