Fractionation with respect to size and density by means of sequential arodynamic classification

通过连续空气动力学分类对尺寸和密度进行分级

• 批准号: 382122643
• 负责人: Professor Dr.-Ing. Frank Einar Kruis
• 金额: --
• 依托单位: Fachgebiet Nanostrukturtechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/382122643?language=en
• 关键词: Fractionation; respect; size; density; means

The goal of this research project is a fractionation with help of aerodynamic lenses, in order to attain a separation on the basis of size as well as material density. A differential aerodynamic lens will be developed to this end, which allows a relative monodisperse classification using a particle-free central sheath gas flow on the basis of the aerodynamic behavior of the particles expressed as particle relaxation time. The main principle is the classification at different pressures, which leads to a change in the pressure-dependent slip correction coefficient. This results in a shift of the relaxation time of identical sized particles, allowing to differentiate between size and material density. The targeted size range is 0,5 to 5 µm. The efficiency of the size-and material-based classification will be assessed with help of online aerosol measurement technology as well as offline elemental analysis.

该研究项目的目标是借助空气动力学透镜进行分级，以便根据尺寸和材料密度进行分离。为此，将开发差分空气动力学透镜，其允许基于表示为颗粒弛豫时间的颗粒的空气动力学行为，使用无颗粒的中心鞘气流进行相对单分散的分类。其主要原理是在不同压力下进行分类，从而导致与压力相关的滑移校正系数发生变化。这导致相同尺寸颗粒的弛豫时间的偏移，从而允许区分尺寸和材料密度。目标尺寸范围为0.5至5 µm。将借助在线气溶胶测量技术和离线元素分析，评估按粒度和材料分类的效率。