对冲滞止面纳米颗粒输运的在线诊断与计算  

In-Situ Measurement and Calculation of the Nanoparticle Transport Phenomena at the Counterflow Stagnation Plane

作　　者：王子豪[1] 张易阳[2] 李水清[1] 张惠婷[1] WANG Zi-Hao ZHANG Yi-Yang LI Shui-Qing ZHANG Hui-Ting(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 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,北京100084 [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,北京100084

出　　处：《工程热物理学报》2017年第8期1795-1799,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金青年科学基金资助项目(No.51406097);清华大学自主科研计划(No.20151080381)

摘　　要：颗粒在边界层内的输运特性对理解和调控颗粒沉积、煤粉燃烧等工业过程有重要的意义。本工作基于近年来发展的相选择性激光诱导击穿光谱(PS-LIBS)方法,对对冲火焰滞止面附近纳米颗粒的输运特性进行了高空间分辨率的解析;并利用颗粒系统群平衡的DSM方法和输运方程对颗粒的对流、扩散和热泳过程进行了数值研究,实验和计算结果吻合良好,表明现有的理论框架可定量预测金属氧化物纳米颗粒在边界层内的输运现象。Particle transport phenomena in boundary layer is the fundamental issue for many industrial processes. Based on a recently development In-Situ laser diagnosis method named PS-LIBS （Phase Selective Laser-induced Breakdown Laser Spectroscopy）, this work investigated the particle volume fraction in counterfiow stagnation plane in a high spatial resolution. Furthermore, a DSM （Discrete-Section Model） method is applied to solve the population evolvement of the particle system. And the transport equation based on the diameter distribution is solved to examine and interpret the experimental data. The comparison shows that our current theoretical structure could predict the transport phenomena of metal oxide nanoparticles in the boundary layer in a satisfactory precision.

关 键 词：纳米颗粒 输运特性 激光诊断 对冲火焰 

分 类 号：TK314[动力工程及工程热物理—热能工程]