Engineering Research Equipment Grant: Acquisition of Equipment for Imaging of Reacting Flows

设备资金将用于购买激光器和紫外线 用于表征温度的荧光成像系统，以及 高温反应中氧化物种浓度场 流动。 直接的应用将是表征 时间演变的温度，OH和O浓度场内的一个 共振突扩燃烧器，一种被评估为危险的装置， 废物焚化炉。 这种测量可以使用激光非侵入性地完成， 诱导荧光（LIF），其中受激准分子激光泵浦染料 被调谐到一种物质的特定跃迁的激光器， 或者在燃烧混合物中自然发生，或者被引种 进入流动。 一般来说，观察到的荧光强度 与发荧光物质的温度和密度有关。 因此，在某些条件下，温度和/或浓度 场可以从激光诱导的平面图像中提取， 荧光。

Equipment funds will be used for the purchase of lasers and a UV fluorescence imaging system for characterizing the temperature and concentration fields of oxidizing species in high temperature reacting flows. The immediate application will be the characterization of the time evolving temperature, OH and O concentration fields inside a resonant dump combustor, an apparatus under evaluation as a hazardous waste incinerator. Such measurements can be accomplished nonintrusively using laser- induced fluorescence (LIF), in which an excimer laser pumps a dye laser that is tuned to a particular transition of a species that either occurs naturally in the combusting mixture, or else is seeded into the flow. In general, the intensity of the observed fluorescence is related to the temperature and density of the fluorescing species. Thus, under certain conditions, temperature and/or concentration fields can be extracted from planar images of laser-induced fluorescence.