摘要
对液柱受到激波冲击后在气流中的变形断裂过程进行了数值计算,研究了在该过程中RichtmyerMeshkov(RM)不稳定性的具体表现。应用Fluent软件,数值模拟了二维(2D)和三维(3D)液柱在激波马赫数为1.10、液柱初始直径为2.76mm的情况下,气/液界面上RM不稳定性的演化过程以及液体周围的流场。计算结果表明,初始扰动数目对RM不稳定性的影响显著;液柱在横截面平面(Z方向)发生变形失稳,导致沿液柱轴向出现变形失稳。数值计算的结果与已有的实验结果吻合较好。
This paper calculated the deformation and rupture process of the liquid column under the impact of shock waves and studied specific representations of Richtmyer-Meshkov （RM） instability in the process. Fluent software is used to carry out numerical simulation of evolutionary process of RM instability on gas/liquid interface and flow field around the gas of 2D and 3D liquid columns when shock roach number is 1.10 and initial diameter of shock math number is 2.76 ram. The results show that the number of initial perturbation imposes significant influences on RM instability; the liquid column deforms and loses stability along the cross section （direction Z）, so deformation and instability appear along axial direction of the liquid column. The numerical calculation results well eoincide with experimental results.
出处
《浙江理工大学学报（自然科学版）》
2014年第5期502-506,共5页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
关键词
RM不稳定性
激波
液柱
数值计算
RM instability
shock wave
liquid eolumn
numerical calculation
