Aerosol Fractal Aggregate Optics and Kinetics in Laminar and Turbulent Flows

层流和湍流中的气溶胶分形聚集光学和动力学

• 批准号: 9709764
• 负责人: Christopher Sorensen
• 金额: $ 27.5万
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-10-01 至 2000-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9709764&HistoricalAwards=false
• 关键词: Aerosol; Fractal; Aggregate; Optics; Kinetics

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.

该项目涉及气溶胶团块的光散射和吸收测量，作为粒径和衍射指数的函数。在不同的克努森制度的团聚动力学将被测量和评估。将分形光学和动力学实验与现有理论和P.I.提出的新模型进行比较，开发非定常流动中颗粒和聚集体尺寸和形态的多角度光学诊断技术，并将其应用于火焰湍流。如果成功，这项研究将更好地理解气溶胶聚集机制、光散射和聚集体吸收过程，并提供一种新的仪器来测量湍流中聚集体的大小和组成。应用范围从空气污染研究中的烟尘形成到火焰反应器中的粉末合成。