吴然^1,2,张琳^1,2,许伟刚^1,2,卜诗^1,2,柳林^1,2

• 1:常州大学 机械工程学院，江苏 常州 213164
• 2:常州大学 江苏省绿色过程装备重点实验室，江苏 常州 213164

摘要(Abstract)：

为研究旋流对小颗粒凝并过程的影响，研究通过整合Lech Gmachowski Brown凝并核模型、湍流凝并核模型和XIAO提出的剪切破碎核模型，建立了一个考虑剪切流影响的适用于全粒径范围的颗粒凝并模型。首先计算了初始粒径为0.5 μm的颗粒凝并效率，对比前人实验数据，验证了新模型对于湍流场过渡区内颗粒凝并行为的适应性。然后考察了旋流运动对亚微米和微米级颗粒凝并的影响，结果表明，旋流影响了亚微米级颗粒的自由扩散，促使不同粒径颗粒分离，从而降低凝并效率；对于微米级颗粒，旋流增加了小颗粒的碰撞概率，但无法提升凝并效果，旋流速度越高，凝并效果越差；在旋流场中设置轴向扰流板，可以改善小颗粒凝并效果。

关键词(KeyWords)： 凝并模型;旋流场;亚微米级及微米级颗业;扰流板

Abstract:

Keywords:

基金项目(Foundation): 江苏省科技厅重点研发计划项目（BE2016211）；江苏省"六大人才高峰"创新人才团队（GDZB-CXTD-001）；江苏省研究生科研与实践创新计划项目（KYCX17_2085）；江苏省大学生创新创业训练计划项目（201710292034Y）；2016国家青年自然科学基金（51606014）；2016江苏省青年自然科学基金（BK20160281）；2016江苏省高校自然科学基金（16KJB470001）。

作者(Author): 吴然^1,2,张琳^1,2,许伟刚^1,2,卜诗^1,2,柳林^1,2

DOI: 10.3969/j.issn.1003-9015.2019.02.011

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