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Research on the Nucleation and Coagulation of Nanoparticles in the Parallel Twin Jets
Author(s): YIN Zhao-qin, LIN Jian-zhong, ZHOU Kun
Pages: 140-
148
Year: 2008
Issue:
2
Journal: APPLIED MATHEMATICS AND MECHANICS
Keyword: 纳米颗粒; 双射流; 成核; 凝聚; 数值计算;
Abstract: 对平行双射流中H2SO4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.
Citations
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