Nitric oxide flow tagging in unseeded air

N.J. Dam, R.J.H. Klein-Douwel, N.M. Sijtsema, J.J. Meulen, ter

Research output: Contribution to journalArticleAcademicpeer-review

85 Citations (Scopus)


A scheme for molecular tagging velocimetry is presented that can be usedin air f lows without any kind of seeding. The method is based on thelocal and instantaneous creation of nitric oxide (NO) molecules fromN2 and O2 in the waist region of a focused ArFexcimer laser beam. This NO distribution is advected by the flow and canbe visualized any time later by laser-induced fluorescence in the γ bands. The creation of NO is confirmed byuse of an excitation spectrum. Two examples of the application of thenew scheme for air-flow velocimetry are given in which single laserpulses are used for creation and visualization of NO.
Original languageEnglish
Pages (from-to)36-38
JournalOptics Letters
Issue number1
Publication statusPublished - 2001


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