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| 基于SPH法的返回舱入水载荷模拟分析 |
| Simulation analysis on water entry loads of a space capsule based on SPH method |
| 投稿时间：2022-05-28 修订日期：2022-06-13 |
| DOI： |
| 中文关键词: SPH两相流算法 返回舱 水上着落 二次砰击 倾角 |
| 英文关键词:SPH two-phase flow algorithm space capsule water landing second slamming tilt angle |
| 基金项目:中央高校基本科研业务费 |
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| 中文摘要: |
| 返回舱水上着落前期面临较大砰击，为研究过程中受到的砰击载荷，基于光滑粒子流体动力学（SPH）气-液两相流算法，首先通过模拟平板和楔形体两种算例模型的入水过程，并与相关文献的试验结果进行对比，验证算法的有效性。在此基础上，对返回舱的入水过程进行模拟。结果显示：两种算例模型的计算结果与相关文献中试验结果吻合良好。返回舱入水速度和倾角对砰击有较大影响并且过程中存在二次砰击现象。砰击载荷随入水速度增大而增加。第一次砰击载荷峰值随倾角增大而减小，第二次砰击载荷峰值随倾角增大先增后减。结果表明:SPH气-液两相流算法能够较好地模拟返回舱入水过程。 |
| 英文摘要: |
| In the early stage of the water landing, the space capsule is faced with a large slamming. To study the slamming load received during the process, based on the smooth particle fluid dynamics (SPH) gas-liquid two-phase flow algorithm, the water entry process of the two study models of the plate and the wedge is first simulated, and the experimental results of the relevant literature are compared to verify the effectiveness of the algorithm. On this basis, the water inlet process of the space capsule is simulated. The results showed that the calculation results of the two study models were 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 inlet. 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 show that the SPH gas-liquid two-phase flow algorithm can better simulate the water entry process of the space capsule. |
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