|
| Numerical Investigation of Hydrodynamic Characteristics of Vehicle in Transonic Oblique Water Entry |
| |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.05.003 |
| KeyWord:vehicle water entry transonic cavity ballistic numerical simulation |
| Author | Institution |
| HAO Liang |
School of Mechanical Engineering, Beijing Institute of Technology, Beijing , China |
| LIU Tao-tao |
School of Mechanical Engineering, Beijing Institute of Technology, Beijing , China;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing , China |
| HUANG Biao |
School of Mechanical Engineering, Beijing Institute of Technology, Beijing , China;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing , China |
| WANG Guo-yu |
School of Mechanical Engineering, Beijing Institute of Technology, Beijing , China;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| This paper aims to study the transonic oblique water entry characteristics of the vehicle, and to obtain the transonic compressible water entry characteristics of the vehicle at different angles of attack. The geometric model of transonic vehicle is established with the numerical simulation adopting VOF (volume of fluid) homogeneous flow model, SST k-ω turbulence model, and Zwart cavity model. And then the correction of liquid compressibility is carried out. The compressible characteristics of water entry under different angles of attack are compared, and the development of cavity around the vehicle, and the attitude and force characteristics on the vehicle are analyzed. The compressible characteristics of transonic oblique water entry of vehicle at different angles of attack are determined. The angles of attack have little effects on the diameter of cavity, but the shape of cavity changing with time at different angles of attack are significantly different, and the integrity of cavity is destroyed with the increase of positive and negative angles of attack. The trajectory offset of the vehicle increases with the increase of the positive angle of attack. Moreover, the trajectory offset increases first with the increase of the negative angle of attack, and then decreases. The horizontal and vertical forces on the vehicle decrease with the increase of the positive angle of attack. Besides, the forces increase first and then decrease with the increase of the negative angle of attack. Under the different water entry angles of attack, the development of transonic water entry structure of vehicle is similar. But with the change of angle of attack, the cavity structure, trajectory offset, and force characteristics change significantly. |
| Close |
|
|
|