本研究基于气液两相流模型和动网格技术对含球鼻艏附体的复杂外飘结构入水过程进行数值研究。模拟过程中分析了球鼻艏对自由面及砰击压力的影响。结果表明，附体使得流体先发生分离，而后重新撞击到外飘区域，形成二次砰击现象，而且流动分离产生的撞击压力明显高于第二次冲击压力。最后进一步探讨了不同入水速度对砰击载荷的影响，表明随着入水速度的增加，靠近球鼻艏的部位（外飘区域1）压力系数增加，而远离球鼻艏的部位（外飘区域2）压力系数保持不变。结构物入水过程中，由于附体引起的二次砰击现象值得关注，这对于改善相关结构的设计具有参考价值。
Water entry of structures is a strongly nonlinear slamming problem, which has long been a subject of extensive attention in the engineering field. The complexity of the problem is further exacerbated by flow separation and cavity phenomena during the water entry of structures with appendages. This study conducts a numerical investigation into the water entry process of a complex flared structure with a bulbous bow appendage, utilizing a gas-liquid two-phase flow model and dynamic mesh technology. During the simulation, the influences of the bulbous bow on the free surface and slamming pressure are analyzed. The results indicate that the appendage causes the fluid to separate initially and then reimpact the flared area, resulting in a secondary slamming phenomenon. Moreover, the impact pressure generated by flow separation is significantly greater than that generated by secondary impact. Finally, the study further explores the effects of different water entry velocities on slamming loads, revealing that as the water entry velocity increases, the pressure coefficient increases in the region near the bulbous bow (flared area 1), whereas it remains unchanged in the region farther from the bulbous bow (flared area 2). During the water entry process of the structure, the secondary slamming phenomenon induced by the appendage warrants attention, as it holds reference value for improving the design of relevant structures.
2025,47(24): 51-56 收稿日期：2025-5-10
DOI：10.3404/j.issn.1672-7649.2025.24.008
分类号：U661.1
基金项目：河南省科技攻关项目（242102220014）；黄淮学院教育教学改革研究项目（2024XJGLX49）
作者简介：莫晓健(1975-),男,副高级工程师,研究方向为结构力学
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