| 通气空泡尾部气泡流仿真和特性分析 |
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| 引用本文： | 向敏,张孜博,屠基元,张为华.通气空泡尾部气泡流仿真和特性分析[J].力学学报,2011,43(5):819-825. |
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| 作者姓名： | 向敏 张孜博 屠基元 张为华 |
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| 作者单位： | 1.国防科技大学国防科技大学航天与材料工程学院 |
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| 基金项目： | 国家留学基金委研究生资助项目(2009611040)~~ |
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| 摘 要： | 基于欧拉-欧拉双流体模型对通气空泡尾部气泡流进行数值仿真, 并采用基于多尺寸分组模型的总体平衡方法预估气泡尺寸分布. 应用改进后湍流耗散系数计算模型, 考虑了气泡体积含量对在湍流作用下气泡扩散现象的影响. 基于上述模型对两种试验工况下流场进行了数值仿真.结果表明模型对空泡尾部回流区特性进行了准确预示, 在回流区高湍流度作用下气泡迅速破碎成小气泡. 并进一步得到试验体尾流区空泡体积分数和速度分布. 尾流区水流速度分布保持了流体经过非流线型对称体时产生的尾流分布规律. 仿真结果与试验数据相一致, 模型适用性得到验证.
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| 关 键 词： | 多尺寸分组 |
| 收稿时间： | 2010-04-22 |
| 修稿时间： | 2011-04-03 |
ON THE NUMERICAL STUDY AND CHARACTERISTIC ANALYSIS OF BUBBLY FLOW CREATED BY VENTILATED CAVITY |
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| Xiang Min Zhang Zibo,Tu Jiyuan,Zhang Weihua.ON THE NUMERICAL STUDY AND CHARACTERISTIC ANALYSIS OF BUBBLY FLOW CREATED BY VENTILATED CAVITY[J].chinese journal of theoretical and applied mechanics,2011,43(5):819-825. |
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| Authors: | Xiang Min Zhang Zibo Tu Jiyuan Zhang Weihua |
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| Institution: | 1.Institute of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073, China2.School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Victoria 3083, Australia |
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| Abstract: | Considering the significant influence that the bubbly flow created at the tail of the ventilated cavity makes on the vehicle hydrodynamics and the cavity control mechanism,a Eulerian-Eulerian two-fluid model was proposed for simulation on the bubbly wakes created by ventilated cavity.The population balance approach integrated with Multiple-Size-Group(MUSIG) model was adopted to predict the bubble size distribution.Furthermore, a new model for the turbulence dispersion coefficient was introduced to take into... |
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| Keywords: | ventilated cavity bubbly flow numerical simulation population balance MUSIG |
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