基于变体积力的跨水气界面多相流及流固耦合问题实验方法研究

航行体跨水气界面过程物理现象复杂并且多种力学效应耦合，相关研究往往需要利用缩比模型实验开展。已有缩比模型实验体积力保持不变，主要考虑弗劳德数和空化数相似，难以分析其他相似参数影响。利用离心机形成可变体积力环境，增加了实验可控参数，提高了实验模拟参数的完备性。通过流动和结构形变理论分析，形成了基于变体积力的跨水气界面多相流及流固耦合问题研究方案，可在考虑弗劳德数和空化数影响条件下，进一步考察雷诺数或结构形变的影响。针对上述研究方案，分析了缩比模型实验模拟条件并开展了仿真计算，验证了所提出实验方案的可行性，为跨介质问题研究丰富了探索途径。

Research on Experimental Method of Multiphase Flow and Fluid Structure Interaction Across Water-Air Interface Based on Variable Body Force

The physical phenomenon of the vehicle crossing water-air interface is extremely complicated, which involves multiple mechanical coupling effects. The related studies are always relied on the scaled model experiments. The body force of the existing scaled model experiment remains unchanged, the Froude and cavitation non-dimensional numbers are considered to be simulated. However, other impact factors can hardly investigated. The control variables are extended by introducing adjustable body force environment in centrifuge, which promotes the multi-parameter simulation capability. Based on the analysis of fluid mechanism and structural deformation theory, a research plan for multiphase flow across the water-air interface and fluid structure coupling based on variable body force is formed. The effect of Reynolds number or structural deformation can be investigated under the condition of considering the influence of Froude and cavitation numbers. According to the above research plan, the simulation conditions of the scale model experiment were analyzed, and the calculation was carried out to verify the practicability of proposed experiment plan, which enriched the exploration ways for the study of cross-media problems.