| 楼建锋,洪滔,朱建士.液滴在气体介质中剪切破碎的数值模拟研究[J].计算力学学报,2011,28(2):210~213 |
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| 液滴在气体介质中剪切破碎的数值模拟研究 |
| Numerical study on shearing breakup of liquid droplet in gas medium |
| 投稿时间：2009-05-09 修订日期：2009-12-07 |
| DOI：10.7511/jslx201102010 |
| 中文关键词: 液滴 变形 破碎 VOF方法 湍流模型 |
| 英文关键词:liquid droplet deformation breakup VOF method turbulent flow model |
| 基金项目:国家自然科学基金和中国工程物理研究院NSAF联合资助基金重点(10676120)项目. |
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| 中文摘要: |
| 液滴变形和破碎是燃料抛撒问题的重要过程。本文将VOF方法和标准k-ε湍流模型组合,建立了计算液滴在气流中变形破碎过程的数值方法。数值模拟了相关的实验,计算得到的液滴破碎过程与实验结果符合较好。在此基础上,分析了几个关键参数(Weber数、Ohnesorge数、液气密度比)对液滴破碎过程的影响。计算结果表明,Weber数对液滴变形破碎起促进作用,而Ohnesorge数和液气密度比起阻碍抑制作用。 |
| 英文摘要: |
| The deformation and breakup of liquid droplet is important in fuel explosive dispersal. In this paper, VOF method and standard k-ε turbulent flow model were combined to simulate the deformation and breakup of liquid droplet in air flow. Previous experiments were simulated with the new method, numerical results were in good agreement with experiments. On this basis, the influence of representative parameters on droplet breakup, such as Weber number, Ohnesorge number and density ratio of liquid to gas, were analyzed. Simulation results show that Weber number plays a catalytic role in deformation and breakup of droplet, while Ohnesorge number and density ratio of liquid to gas impede the breakup. |
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