Actions for Investigation of light source and scattering medium related to vapor-screen flow visualization in a supersonic wind tunnel

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Investigation of light source and scattering medium related to vapor-screen flow visualization in a supersonic wind tunnel

Author
Snow, W. L.
Published
Dec 1, 1984.
Physical Description
1 electronic document
Additional Creators
Morris, O. A.
Online Version

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Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
Methods for increasing the radiant in light sheets used for vapor screen set-ups were investigated. Both high-pressure mercury arc lamps and lasers were considered. Pulsed operation of the air-cooled 1-kW lamps increased the light output but decreased reliability. An ellipsoidal mirror improved the output of the air-cooled lamps by concentrating the light but increased the complexity of the housing. Water-cooled-4-kW lamps coupled with high-aperture Fresnel lenses provided reasonable improvements over the air-cooled lamps. Fanned laser beams measurements of scattered light versus dew point made in conjunction with successful attempts to control the fluid injection. A number of smoke generators are described and test results comparing smoke and vapor screens are shown. Finally, one test included a periscope system to relay the image to a camera outside the flow.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19850006835.
Accession ID: 85N15144.
L-15836.
NAS 1.15:86290.
NASA-TM-86290.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15706077