平行双射流场纳米颗粒的形成与凝聚的研究

尹招琴; 林建忠; 周锟

平行双射流场纳米颗粒的形成与凝聚的研究

尹招琴^1,2,
林建忠^1,2,
周锟¹

1.
浙江大学力学系流体工程研究所,杭州 310027;2.中国计量学院流动检测与仿真研究所,杭州 310018

基金项目: 国家科技部重大基础研究前期研究专项资助项目(2005CCA06900)

详细信息

作者简介:
尹招琴(1976- ),女,浙江人,博士生;林建忠,教授(联系人.Tel:+86-571-86836009;Fax:+86-571-87951464;E-mail:jzlin@sfp.zju.edu.cn).

中图分类号: O359
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- 文章访问数: 2433
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出版历程
- 收稿日期: 2006-05-16
- 修回日期: 2007-12-25
- 刊出日期: 2008-02-15

Research on the Nucleation and Coagulation of Nanoparticles in the Parallel Twin Jets

1.
Institute of Fluid Engineering, Department of Mechanics, Zhejiang University, Hangzhou 310027, P. R. China;

摘要

摘要: 对平行双射流中H2SO4蒸气扩散进行了大涡模拟，给出了硫酸/水系统成核生成纳米颗粒及颗粒的凝聚过程中颗粒的分布特性，分析了燃料中硫的浓度、环境相对湿度以及射流Reynolds数对于颗粒浓度和粒径分布的影响．结果表明，硫酸/水系统会成核生成大量的纳米颗粒，在双管射流的中间和射流场周围，颗粒具有较高的浓度；颗粒的凝聚过程使颗粒的数量减少、直径变大；随着硫的浓度的增加，流场中的颗粒浓度有明显增加，而成核后形成的颗粒直径减小；环境湿度和Reynolds数的增大，有利于成核过程，因而导致形成更多的颗粒．
- 纳米颗粒 /
- 双射流 /
- 成核 /
- 凝聚 /
- 数值计算
Abstract: The large eddy simulation method has been used to simulate the diffusion of H₂SO₄ vapor in the parallel twin jets.The distributions of number concentration and size of nanoparticles produced by nucleation and coagulation in sulfuric acid/water system were given.The functions of the sulfur content,relative humidity and jet Reynolds number were evaluated according to the distributions of number concentration and size of nanoparticles.The results show that the nucleation in sulfuric acid/water system produces large number of nanoparticles,and ga-sto-nanoparticle conversion mostly takes place in the middle and interface of the twin jets.The coagulation process of particles reduces the number concentration but increases the mean particle size.For the case with higher sulfur content,more number and smaller size nanoparticles are produced by nucleation and coagulation.There is also a larger number of nanoparticles for the cases with higher relative humidity and jet Reynolds number.
- nanoparticle /
- twin jets /
- nucleation /
- coagulation /
- numerical calculation

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参考文献(15)

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平行双射流场纳米颗粒的形成与凝聚的研究

作者简介:
尹招琴(1976- ),女,浙江人,博士生;林建忠,教授(联系人.Tel:+86-571-86836009;Fax:+86-571-87951464;E-mail:jzlin@sfp.zju.edu.cn).

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Research on the Nucleation and Coagulation of Nanoparticles in the Parallel Twin Jets

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留言板

平行双射流场纳米颗粒的形成与凝聚的研究

作者简介: 尹招琴(1976- ),女,浙江人,博士生;林建忠,教授(联系人.Tel:+86-571-86836009;Fax:+86-571-87951464;E-mail:jzlin@sfp.zju.edu.cn).

计量

出版历程

Research on the Nucleation and Coagulation of Nanoparticles in the Parallel Twin Jets

计量

出版历程

目录

作者简介:
尹招琴(1976- ),女,浙江人,博士生;林建忠,教授(联系人.Tel:+86-571-86836009;Fax:+86-571-87951464;E-mail:jzlin@sfp.zju.edu.cn).