Imaging of molecular hydrogen and oxygen by single and two-photon fluorescence using laser and flashlamp sources

G Diskin, W. Lempert, R Miles, V. Kumar, Ivan Glesk

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Two flow visualization techniques, i.e., simultaneous two-dimensional fluorescence imaging of H2 and O2 in a diffusion flame, and quasi-linear fluorescence imaging of O2, are presented. The first uses an injection-locked argon-fluoride excimer laser and a partial overlap of a two-photon ground state absorption in H2 with a single photon absorption from a vibrational level in O2. The second uses a simple, high-intensity ultraviolet flashlamp which provides a flux of photons in the 180-195 nm range, sufficient to produce a quasi-one-dimensional fluorescence image of hot/room temperature oxygen. Both techniques do not require that a seed material be introduced into the flow, they can image major flow constituents, and provide an instantaneous snapshot of the flow.
Original languageEnglish
Title of host publicationAIAA 29th Aerospace Meeting
Place of PublicationUnited States
Number of pages11
DOIs
Publication statusPublished - 7 Jan 1991

Keywords

  • argon lasers
  • diffusion flames
  • excimer lasers
  • flash lamps
  • flow visualization
  • hydrogen
  • laser induced fluorescence

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