| 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.[点击复制] |
| LIU Changbo,LEI Fanpei,ZHOU Lixin.A new multiscale simulation method for primary atomization[J].Journal of National University of Defense Technology,2014,36(3):25-31[点击复制] |
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| 雾化过程的多尺度仿真算法 |
| 刘昌波1, 雷凡培2, 周立新1 |
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(1.西安航天动力研究所， 陕西 西安 710100;2.中国航天科技集团公司，北京 100037)
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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。 |
| 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 |
| DOI：10.11887/j.cn.201403005 |
| 投稿日期：2013-09-09 |
| 基金项目:国家重大基础研究资助项目（613193） |
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| A new multiscale simulation method for primary atomization |
| LIU Changbo1, LEI Fanpei2, ZHOU Lixin1 |
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(1. Xi’an Aerospace Propulsion Institute, Xi’an 710100, China;2. China Aerospace Science and Technology Corporation, Beijing 100037, China)
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| Abstract: |
| A new multiscale method of primary atomization is proposed. The liquid blobs larger than the grid volumes were captured by the volume of fluid algorithm, the droplets comparable with the grid volumes or smaller were 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 was used to describe the turbulent flow. A new developed code was validated by several cases, and some key parameters were investigated to improve the precision. The primary atomization of a single jet was calculated, and the results of instantaneous and average characteristics are in good agreement with the experimental results. |
| Keywords: primary atomization multiscale large eddy simulation volume of fluid Lagrangian particle tracking |
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