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

Diskin, G and Lempert, W. and Miles, R and Kumar, V. and Glesk, Ivan (1991) Imaging of molecular hydrogen and oxygen by single and two-photon fluorescence using laser and flashlamp sources. In: AIAA 29th Aerospace Meeting. American Institute of Aeronautics and Astronautics, United States.

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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.

Author(s):Diskin, G, Lempert, W., Miles, R, Kumar, V. and Glesk, Ivan ORCID logoORCID: https://orcid.org/0000-0002-3176-8069
Item type:Book Section
ID code:48194
Keywords:argon lasers, diffusion flames, excimer lasers, flash lamps, flow visualization, hydrogen, laser induced fluorescence, Optics. Light, Atomic and Molecular Physics, and Optics
Subjects:Science > Physics > Optics. Light
Department:Faculty of Engineering > Electronic and Electrical Engineering
Depositing user: Pure Administrator
Date deposited:21 May 2014 11:25
Last modified:21 Sep 2019 01:27
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URI:https://strathprints.strath.ac.uk/id/eprint/48194
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