火焰场纳米颗粒间长程相互作用对碰撞率增强效应的研究  

Effect of Long-range Interactions on the Enhancement of Nanoparticle Collision Rate in Flames

作　　者：雷舒婷 张易阳 李水清[1] LEI Shuting;ZHANG Yiyang;LI Shuiqing(Key Laboratory of Thermel Science and Power Engincering,Tsinghua University,Beijing 100084,China;Key Laboratory of Adranced Reactor Engineering and Safety of Ministry of Education,Collaborative Iunovation Center of Advanced Nuclear Energy Technology,Institute of Nuclear and New Energv Technology,Tsinghua University,Bejjing 100084,China)

机构地区：[1]清华大学热能工程系热科学与动力工程教育部重点实验室,北京10084 [2]清华大学核能与新能源技术研究院,先进核能技术协同创新中心,先进反应堆工程与安全教育部重点实验室,北京10084

出　　处：《工程热物理学报》2022年第8期2058-2063,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.52130606);国家自然科学基金面上项目(No.51776109)。

摘　　要：针对纳米氧化物颗粒间偶极相互作用力和范德华力对碰撞率的增强作用,我们通过两体动力学建模和量纲分析的方法,分别给出了仅有偶极相互作用力,仅有范德华力,和偶极相互作用力与范德华力同时存在情况下,碰撞率增强因子的拟合公式。探究了两种力同时存在的情况下,两种力对增强因子的贡献占比,发现随着无量纲数D_(vdw)和D_(dipole)相对大小的变化,增强因子出现了由范德华力决定,由两种力共同决定和由偶极相互作用力决定三种情况。To investigate the enhancement effect of dipole-dipole interaction force and van der Waals force on nano-oxide particles collision rate, we apply two-body dynamics modeling and dimensional analysis to obtain the fitted formulas for the enhancement factor of collision rate in the presence of dipole-dipole interaction forces only, van der Waals forces only, and both dipole-dipole interaction forces and van der Waals forces respectively. When the two forces exist at the same time,the contribution ratio of the two forces to the enhancement factor is explored, and it is found that the fitting formula of the enhancement factor can be divided into three stages: dominated by van der Waals forces, dominated by both forces together and dominated by dipole-dipole interactions with the change of the relative magnitudes of the dimensionless number D_(vd)wand D_(dipole).

关 键 词：纳米氧化物颗粒 碰撞率增强 长程相互作用 量纲分析 

分 类 号：TK123[动力工程及工程热物理—工程热物理]