|
| Ricochet Phenomenon of Tans-media Vehicle at High-speed Oblique Water-entry |
| |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.05.005 |
| KeyWord:ricochet trans-media vehicle enter the water at a high speed cavitation multiphase flow |
| Author | Institution |
| ZHOU Ke |
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing , China |
| HUANG Zhen-gui |
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing , China |
| CHEN Zhi-hua |
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing , China |
| LIU Xiang-yan |
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing , China |
| WANG Hao |
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| In order to reveal the ricochet mechanism of the trans-media vehicle entering water at high speed, and improve the penetration ability of the trans-media vehicle. Based on STAR-CCM+ fluid simulation software, the cavitation flow fields were calculated during the ricochet process of the vehicle by use of the VOF multiphase flow model and Schnerr-Sauer cavitation model. The motions of the vehicle were calculated using the overset mesh technique to couple the six-degree-of-freedom algorithm. Using the established computational model, the cavitation evolution, hydrodynamic and ballistic characteristics of the vehicle under different water entry speeds and angles were studied, and the causes and laws of the ricochet phenomenon of the vehicle were revealed. The results showed that when the vehicle enters the water at a small angle and high speed, the underwater motion trajectory will change greatly. It has experienced three stages:entering the water, soaking in the water and leaving the water. The main reason for ricochet was that after entering the water, the forces on the upper and lower edges of the head and on sides of the tail of the vehicle are uneven, forming an upward deflection moment, which greatly changes the pitch angle of the vehicle, and as the speed of the vehicle entering the water is faster, the smaller the angle of entering the water, the easier it is to produce ricochet. |
| Close |
|
|
|