入射和反射激波诱导重气泡变形和失稳的三维数值研究

朱跃进; 董刚; 刘怡昕; 范宝春

doi:10.11858/gywlxb.2012.03.004

入射和反射激波诱导重气泡变形和失稳的三维数值研究

doi: 10.11858/gywlxb.2012.03.004

南京理工大学瞬态物理重点实验室，江苏南京 210094

详细信息

通讯作者:
董刚 dgvehicle@yahoo.com

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出版历程
- 收稿日期: 2010-12-21
- 修回日期: 2011-01-23
- 发布日期: 2012-06-15

Three-Dimensional Numerical Investigation of Deformation and Instability of High-Density Bubble Induced by Incident and Reflected Shock Waves

Science and Technology on Transient Physics Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 采用大涡模拟方法，对入射激波及其反射激波诱导球形重气泡的变形失稳过程进行了三维数值模拟，利用已有实验验证了计算模型的可靠性，重点考察了反射激波与已经失稳的气泡界面的再次作用，讨论了涡环的形成及其三维失稳的过程。研究结果显示：入射和反射激波与球形重气泡作用产生斜压效应，会在流场中产生旋转方向截然相反的多个涡环；反射激波诱导的涡环具有较小的强度，故更加容易失稳，甚至能完全形成具有流向涡量的复杂小尺度涡结构。
- 激波 /
- 斜压效应 /
- 涡量 /
- 涡环 /
- 方位角不稳定
Abstract: The three-dimensional deformation and instability of high-density spherical bubble induced by incident shock wave and its reflected wave were studied numerically by using large eddy simulation method. The computational model was validated by the experimental results. The emphasis was placed on the interaction of reflected shock wave with the deformed high-density bubble. The formation and three-dimensional instability of vortex rings were discussed. The results show that the high-density spherical bubble can form the vortex rings with the different rotating directions along the streamwise direction induced by incident and reflected shock waves due to the baroclinic effect. The vortex rings induced by reflected shock wave have the less strength, and therefore are more likely unstable, and even can form a complicated small-scale structure dominated by the streamwise vortices.
- shock wave /
- baroclinic effect /
- vorticity /
- vortex ring /
- azimuthal instability

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参考文献(25)

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