CAREER: Formation and Evolution of Soot Particles During Turbulent Nonpremixed Combustion

这项研究的目的是为了了解湍流非预混火焰中碳烟颗粒的演变，特别是碳烟前体颗粒是如何由高分子化合物形成的。研究了超大型集料在重烟尘火焰中的聚集动力学。分析了碳烟颗粒的详细纳米结构，以帮助识别碳烟的来源。使用两种燃料：甲烷用于研究煤烟前体颗粒，乙炔用于研究高浓度和大聚集体。实验技术包括角光散射/消光和热泳取样。通过对散射信号的分析，评价了湍流对烟度场的影响。还测量了温度、速度和辐射热损失，包括广泛的教育活动，包括课程和课程的开发，本科生积极参与研究，鼓励代表不足的群体成员，参与工业实践，将计算机技术和兴趣带到课堂和教学实验室。

The objective of this research is to provide an understanding of the evolution of soot particles in turbulent nonpremixed flames, specifically how soot precursor particles are formed from high-molecular-weight compounds. The aggregation kinetics of super-large aggregates in heavily sooting flames is explored. The detailed nanostructure of soot particles is analyzed to help identify the source of the soot. Two fuels are used: methane for studies of soot precursor particles and acetylene for studies of high concentrations and large aggregates. Experimental techniques include angular light scattering/extinction and thermophoretic sampling. The effect of turbulence on the soot field is evaluated by analysis of the scattered signal. Measurements of temperature, velocity, and radiative heat loss are also made.A broad range of educational activities is included consisting of development of courses and curricula, active participation of undergraduates in research, encouragement of members of underrepresented groups, involvement of industrial practice, and bringing computer technology and the interest to the classroom and instructional laboratory.