| 李晓勇， 陈晔.凹凸腔方波型微混合器的数值研究[J].轻工机械,2019,37(1):43-48 |
| 凹凸腔方波型微混合器的数值研究 |
| Numerical Simulation of Square Wave Micro Mixer with Concave Convex Cavity |
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| DOI：10.3969/j.issn.1005 2895.2019.01.008 |
| 中文关键词: 微混合器 凹凸腔 方波型 混合强度 压降 |
| 英文关键词:micro mixer concave convex cavity square wave type mixing performance pressure drop |
| 基金项目: |
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| 摘要点击次数: 970 |
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| 中文摘要: |
| 通过对微混合器的通道结构进行优化或设计新型的通道，改变流体的运动状态，实现流体之间的快速混合和提高混合效率是当今微混合器研究的重点。为了进一步提高微混合器的混合效率，课题组设计了一种带有凹凸腔的方波型微混合器。在不同的Re下，对设计的微混合器进行数值模拟，以混合强度和压降作为评价指标，得到了凹凸腔方波型微混合器的最优结构参数。研究结果表明：凹凸腔微混合器的混合强度和压降都高于方波型微混合器，在Re=10时混合强度提升最显著。对2种结构进行流场分析，发现流体流经凹凸腔结构时能够产生涡流，层流状态被打破，流体之间的接触面积增大，混合强度得到提高。 |
| 英文摘要: |
| Optimizing the channel structure of the micro mixer or designing a new type of channel, changing the flow state of the fluid, rapid mixing fluids and improving mixing efficiency are the focus of the current micro mixer research. In order to further improve the mixing efficiency of the micro mixer, a square wave type micro mixer with concave convex cavities was designed. Numerical simulation of the designed micro mixer under different Reynolds numbers (Re) was carried out, with the mixing strength and pressure drop as the evaluation indexes, the optimal structural parameters of the concave convex cavity square wave type micro mixer were achieved. The results show that the mixing strength of the concave convex cavity micro mixer is higher than the square wave type micro mixer, the pressure drop is also increased, the mixing strength is most significant at Re=10. By analyzing the flow field of the two structures, it is found that the fluid flows through the concave convex cavity structure, the laminar flow state is broken and the contact area between the fluids is increased, the mixing strength is improved. |
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