Aerosol Fractal Aggregate Optics and Kinetics in Laminar and Turbulent Flows

该项目涉及气溶胶凝聚体的光散射和吸收测量，作为颗粒大小和衍射指数的函数。将测量和评估在不同克努森制度下的团聚动力学。将分形光学和动力学实验与现有的理论进行了比较，提出了一种新的非定常流动中颗粒和集合体尺寸和形态的多角度光学诊断技术，并将其应用于火焰中的湍流流动。如果研究成功，这项研究将提供对气溶胶聚集机制的更好理解，以及对聚集体的光散射和吸收过程的了解，并为测量湍流中的聚集体的大小和组成提供了一种新的工具。应用范围从空气污染研究中的碳烟形成到火焰反应器中的粉末合成。

This project involves light scattering and absorbtion measurements on aerosol agglomerates as a function of particle size and diffraction indices. The dynamics of agglomeration at various Knudsen regimes will be measured and evaluated. The fractal optics and kinetics experiments will be compared with existing theories and a new model proposed by the P.I. A multi-angle optical diagnostic technique for size and morphology of particle and aggregate in unsteady flows will be developed, with application to turbulent flows in flames. If successful, the study will provide better understanding of the aerosol aggregation mechanisms, of light scattering and absorption processes from aggregates, and a new instrument to measure the aggregate size and composition in turbulent flows. Application range from soot formation in air pollution studies to powders synthesis in flame reactors.