Physics
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979rsci...50..705d&link_type=abstract
Review of Scientific Instruments, vol. 50, June 1979, p. 705-707. NASA-supported research.
Physics
1
Flow Visualization, Gas Flow, Ozone, Tracers, Ultraviolet Absorption, Ariel, Chemiluminescence, Fluorescence, Mercury Lamps, Ultraviolet Detectors, Ultraviolet Photometry, Photometers, Radiometers, And Colorimeters, Photography, Photographic Instruments, Xerography, Chemiluminescence
Scientific paper
The paper describes a new flow-visualization technique based on the absorption of ultraviolet light by ozone. Ozone is an excellent tracer, because as a gas it has the same effective physical properties as air. Ozone strongly absorbs the principal line (253.7 nm) of a mercury lamp, so that when an ozone-traced flow passes between a mercury lamp and a fluorescent screen, a sharp, shadow-like image of the ozone tracer is cast on the screen. Quantitative photometry can be carried out by replacing the screen with ultraviolet detectors that yield the path-integrated column density of ozone in the flow. High-speed quantitative point monitoring (10 Hz at 10 ppb O3) is possible with capillary probes and chemiluminescent analysis.
Dickerson Russell R.
Stedman Donald H.
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