多线羟基标志测速技术用于反应和非反应实验流体

2008/02/14   下载量: 57

方案摘要

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应用领域 石油/化工
检测样本 其他
检测项目
参考标准 暂无

A new compact micro-lens optical system has been developed to produce a 7 x 7 multiline optical grid for Hydroxyl Tagging Velocimetry (HTV). These lines provide additional spatial information and aid the software tracking of the flowfield by increasing its resolution. Single-photon photodissociation of groundstate H2O by a ~193-nm ArF excimer laser “writes” a 7 x 7 beam molecular grid with very long gridlines of superequilibrium OH and H photoproducts in either room air flowfields or in H2-Air flames due to the presence of H2O vapor. The displaced OH tag lines’ positions are revealed through fluorescence by A2Σ+ (v′= 0) ← X2Πi (v″ = 0) OH excitation using a ~308 nm pulsed frequency-doubled dye laser. A time-of-flight software (DaVis 6.0 Stereo PIV/PTV, LaVision, GmbH) determines the instantaneous velocity field. HTV tag lifetime comparisons between experimental results and theoretical predictions are discussed.

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