| 雾化过程的多尺度仿真算法 |
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| 引用本文： | 刘昌波,雷凡培,周立新.雾化过程的多尺度仿真算法[J].国防科技大学学报,2014,36(3):25-31. |
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| 作者姓名： | 刘昌波 雷凡培 周立新 |
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| 作者单位： | 西安航天动力研究所,中国航天科技集团公司,西安航天动力研究所 |
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| 基金项目： | 国家重点基础研究发展计划（973计划） |
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| 摘 要： | 提出了一种雾化过程多尺度仿真算法:对大块液团运动,采用流体体积法直接模拟;将与网格尺度相当或更小的液滴简化成粒子,采用一种基于虚网格的拉格朗日粒子法进行追踪;湍流运动采用了湍流动能单方程输运模型的大涡模拟。基于新算法开发了一套仿真程序,并对此程序进行了验证,对影响模型精度的重要参数进行了深入研究。采用该算法对单股射流的雾化过程进行了仿真,雾场的瞬态和统计特性分析表明,仿真结果与试验结果吻合较好。
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| 关 键 词： | 雾化 多尺度仿真 大涡模拟 流体体积法 拉格朗日粒子法 |
| 收稿时间： | 9/9/2013 12:00:00 AM |
A new multiscale simulation method for primary atomization |
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| LIU Changbo,LEI Fanpei and ZHOU Lixin.A new multiscale simulation method for primary atomization[J].Journal of National University of Defense Technology,2014,36(3):25-31. |
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| Authors: | LIU Changbo LEI Fanpei and ZHOU Lixin |
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| Institution: | LIU Changbo;LEI Fanpei;ZHOU Lixin;Xi’an Aerospace Propulsion Institute;China Aerospace Science and Technology Corporation; |
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| Abstract: | A new multiscale method of primary atomization is proposed. The liquid blobs larger than the grid volumes are captured by the volume-of-fluid algorithm, the droplets comparable with the grid volumes or smaller are simplified to particles and tracked by a Lagrangian particle tracking model on a virtual mesh. Large-eddy simulation with one equation sub-grid scale turbulent energy transport model is used to describe the turbulent flow. A new developed code is validated by several cases, and some key parameters are investigated to improve the precision. The primary atomization of a single jet is calculated, and the results of instantaneous and average characteristics are good agreement with experimental results. |
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| Keywords: | primary atomization multiscale large-eddy simulation volume-of-fluid Lagrangian particle tracking |
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