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光荧光成像系统，以确定高温反应流动中氧化物质的温度和浓度场。直接的应用将是表征共振倾倒燃烧器内的时间演变的温度、OH和O浓度场，这是一种正在评估的危险废物焚烧炉。这种测量可以使用激光诱导荧光(LIF)非侵入性地完成，在LIF中，准分子激光泵浦一种染料激光，该激光被调谐到一种物种的特定跃迁，该跃迁要么在燃烧混合物中自然发生，要么被种子注入流动中。一般来说，观察到的荧光强度与荧光物种的温度和密度有关。因此，在一定条件下，可以从激光诱导荧光的平面图像中提取出温度和/或浓度场。

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.