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| Simulation analysis on water entry loads of a space capsule based on SPH method |
| Received:May 28, 2022 Revised:July 13, 2022 |
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| DOI：10.7511/jslx20220528002 |
| KeyWord:SPH two-phase flow algorithm space capsule water landing second slamming tilt angle |
| Author | Institution |
| 丁宁 |
中国民航大学 航空工程学院, 天津 |
| 王鑫博 |
中国民航大学 航空工程学院, 天津 |
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| Abstract: |
| In the early stage of water landing,a space capsule is faced with a large slamming.To study the slamming load received during landing,based on the smooth particle fluid dynamics (SPH) gas-liquid two-phase flow algorithm,the water entry process of the two models of a plate and a wedge is first simulated,and the experimental results in the relevant literature are compared to verify the effectiveness of the algorithm.On this basis,the water entry process in the space capsule is simulated.The results show that the calculation results of the two models are in good agreement with the experimental results in the relevant literature.The water velocity and tilt angle of the space capsule has a greater impact on the slamming and there is a secondary slamming phenomenon in the process.The slam load increases with the speed of the water entry.The peak of the first slamming load decreases with the increase of tilt angle,and the peak of the second slamming load increases first with the increase of tilt angle and then decreases.The results also show that the SPH gas-liquid two-phase flow algorithm can better simulate the water entry process of the space capsule. |