非稀疏气泡流激波传播的数值模拟研究  

Numerical Simulation of Shock Wave Propagation in Non-dilute Bubbly Flow

作　　者：李晨[1] 王本龙[1] 洪尧 刘筠乔[1] Li Chen;Wang Benlong;Hong Yao;Liu Yunqiao(School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学水动力教育部重点实验室,上海200240

出　　处：《水动力学研究与进展（A辑）》2023年第2期286-292,共7页Chinese Journal of Hydrodynamics

基　　金：基础加强项目(2019-JCJQ-ZD-016-00)。

摘　　要：该文采用Godunov格式方法对激波在气泡流中的传播过程进行了数值模拟,研究单个气泡和气泡群与激波的相互作用过程。建立了一个考虑气泡间相互作用和气泡非球形变形等因素的群泡模型,验证了该计算方法对气泡和气泡流问题的有效性,模拟得到的激波波速与一维激波理论的波速接近。预报了激波在大体积分数气泡流中的传播发展过程:在气泡体积分数α=0.1时激波在气泡流区域形成一个A型激波(波面较为陡峭且激压力到达峰值之后出现振荡),而在α=0.3时激波的结果更接近于B型激波(激波压力上升较慢且有一定振荡),随着激波向下游的传播波面振幅降低向C型激波(压力平滑上升)发展,说明了气泡流对激波传播发挥了松弛作用。In this paper,the Godunov scheme is used to simulate the interaction between a shock wave and bubbles.The interaction between the shock waves and a single bubble or the bubbly flow is investigated.A model considering the interaction between bubbles and the non-spherical deformation of bubbles is established.And then the model is carefully verified.The simulated shock wave velocity is close to the velocity which is predicted by the one-dimensional shock wave theory.The simulation results predict the propagation and development process in bubbly flow with the volume fraction of bubblesα=0.1,the shock wave forms an A-type shock wave in the bubbly flow area,whose wave structure is steep and the shock pressure oscillates after reaching the peak.Whenα=0.3,the result of the shock wave form is closer to the B-type,whose pressure rises slowly and still has some oscillation.As the propagation of the shock wave downstream,the amplitude of oscillation of the shock wave decreases and it develops toward the C-type shock wave with the pressure rising smoothly,demonstrating the relaxation mechanism of bubbles.

关 键 词：气泡流 激波结构 Godunov格式 

分 类 号：O352[理学—流体力学]