近自由面通气空泡诱导的飞溅水层闭合行为数值模拟

王广航; 王静竹; 杜岩; 王志英; 王一伟

doi:10.7638/kqdlxxb-2023.0112

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近自由面通气空泡诱导的飞溅水层闭合行为数值模拟

研究专栏——跨水空介质动力学研究Ⅰ | 更新时间：2026-07-27

- 近自由面通气空泡诱导的飞溅水层闭合行为数值模拟
- Numerical study on the behaviors of bubble ventilation and splash closure
- 空气动力学学报 2024年42卷第1期页码：113-122
- 作者机构：
  
  1. 中国科学院力学研究所,北京,100190
  2. 中国科学院大学未来技术学院,北京,100190
  3. 中国科学院大学工程科学学院,北京,100190
  4. 广东空天科技研究院,广州,511458
- 作者简介：
  
  王广航（1997—），山东菏泽人，博士研究生，研究方向：空化与空泡动力学. E-mail：wangguanghang@imech.ac.cn
  王静竹*（1989—），北京海淀人，副研究员，博士，研究方向：界面稳定性、强耦合作用、空泡动力学. E-mail：wangjingzhu@imech.ac.cn
- 基金信息：
- DOI：10.7638/kqdlxxb-2023.0112
  中图分类号： O352
- 纸质出版：2024
- 稿件说明：
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王广航, 王静竹, 杜岩, 等. 近自由面通气空泡诱导的飞溅水层闭合行为数值模拟[J]. 空气动力学学报, 2024, 42(1): 113−122.

WANG Guanghang, WANG Jingzhu, DU Yan, et al. Numerical study on the behaviors of bubble ventilation and splash closure[J]. 2024, 42(1): 113-122.
王广航, 王静竹, 杜岩, 等. 近自由面通气空泡诱导的飞溅水层闭合行为数值模拟[J]. 空气动力学学报, 2024, 42(1): 113−122. DOI： 10.7638/kqdlxxb-2023.0112

WANG Guanghang, WANG Jingzhu, DU Yan, et al. Numerical study on the behaviors of bubble ventilation and splash closure[J]. 2024, 42(1): 113-122. DOI： 10.7638/kqdlxxb-2023.0112.

摘要

当空泡与自由面距离较远时，两者不会发生界面的直接相互作用，表现为以界面间液态水为间接媒介的弱耦合作用。当空泡靠近自由面时，两者界面发生直接相互作用，表现为空泡通气、自由面飞溅以及水层闭合行为的强耦合作用。本文通过数值模拟分析了强耦合作用下飞溅水层闭合行为。基于开源的OpenFOAM平台的多相可压缩求解器，采用有限体积法直接求解Navier-Stokes方程，并使用流体体积法来捕捉气液界面。结果表明，外部气体进入空泡的时间随着无量纲距离$ \gamma $和环境压力的增加而减少，飞溅水层闭合高度随无量纲距离$ \gamma $的增加而增加，随着环境压力的增加而减少。通过对飞溅水层受力分析，获得了近自由面空泡诱导的飞溅水层闭合机制，主要是由水层两侧的压差力驱动，而且，水层闭合时间与环境压力满足−0.92幂次律关系。

Abstract

When the distance between a bubble and a free surface is far

the direct interaction between the two interfaces will not occur

showing a weak coupling effect with liquid water as an indirect medium between the interfaces. When a bubble is extremely close to the free surface

their interfaces are fused

showing a strong coupling effect of bubble ventilation

free surface splash and closure. In this paper

numerical simulation is used to investigate the behaviors of the splash closure under the strong coupling effect. Based on the compressible multiphase solver in the framework of open-source software OpenFOAM

the finite volume method and volume of ﬂuid method are used to solve the Navier-Stokes equations and precisely capture the gas‒liquid interface

respectively. Numerical results show that the time of external air entering the bubble decreases with the increase of dimensionless standoff distance $ \gamma $ and ambient pressure. The height of splash closure increases with the increase of $ \gamma $ and continuously decreases with the increase of ambient pressure. By analyzing the forces on the splash

we obtain the closure mechanism of the splash induced by a bubble near the free surface. It is mainly driven by the pressure difference between the two sides of the splash and

moreover

the closure time of splash satisfies a −0.92 power law relationship.

关键词

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references

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