为了获得圆柱体高速入水过程的演化规律，采用计算流体力学方法对其进行仿真模拟。应用VOF模型和重叠网格技术对圆柱体入水过程的运动情况进行计算，利用Schnerr-Sauer空化模型对入水空化现象进行模拟。仿真获得圆柱体入水过程的空泡演化过程、压力变化和速度衰减曲线。结果表明：圆柱体高速入水过程中，速度先急剧减小然后逐步平稳降低，空泡开始形成，圆柱头部边角处出现空化现象；在撞水时圆柱头部压力急剧增大，入水后压力迅速减小；入水过程与文献结果变化趋势一致，验证了模型的可靠性。
In order to study the high speed water entry process of cylinder, the research was conducted by numerical simulation with computational fluid dynamics(CFD). It was modeled with Volume of Fluid(VOF) and overset mesh. The Schnerr-Sauer model was selected to simulate the cavitation phenomena during the water entry process. It was derived with the bubble developing process, pressure and velocity curves. It was showed that at first the velocity of the cylinder decreases rapidly and then attenuates at a slower rate during the water entry process, the jet appears at the edge of the cylinder. The pressure at the center of the front surface of the cylinder grows fast in the penetration process and after that reduces sharply. The result of the simulation was in accordance with the reference and the reliability of the model was validated.
2022,44(2): 1-5 收稿日期：2021-06-16
DOI：10.3404/j.issn.1672-7649.2022.02.001
分类号：TJ67
作者简介：苗圃(1982-)，男，高级工程师，主要从事超空泡技术研究
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