Multiline hydroxyl tagging velocimetry measurements in reacting and nonreacting experimental flows

Multiline hydroxyl tagging velocimetry measurements in reacting and nonreacting experimental flows A compact micro-lens optical system is developed that produces a 7×7 multi-line optical grid for Hydroxyl Tagging Velocimetry (HTV) and generates at least 49 resolvable velocity vectors. Single-photon photodissociation of ground-state H2O by a ~193-nm ArF excimer laser “writes” a 7×7 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 line positions are revealed through fluorescence by A 2 Σ + (v′=0)←X 2 Π i (v″=0) OH excitation using a ~308-nm pulsed frequency-doubled dye laser. Time-of-flight analysis software determines the instantaneous velocity field in either an air nozzle or in a hydrogen/air flame. The OH tag lifetime is measured and compared to theoretical predictions using detailed chemistry. The lifetime of the OH tag is significantly enhanced by the presence of O atoms from 193-nm photodissociation of O2. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Multiline hydroxyl tagging velocimetry measurements in reacting and nonreacting experimental flows

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Publisher
Springer-Verlag
Copyright
Copyright © 2004 by Springer-Verlag
Subject
Engineering
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-004-0785-3
Publisher site
See Article on Publisher Site

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