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Vapor-Generator Wand Helps To Reveal Airflow PatternsIn vapor-generator wand, liquid propylene glycol flows into electrically heated stainless-steel tube. Liquid boils in heated tube, and emerging vapor forms dense, smoke-like fog used to make airflow patterns visible. Built in variety of sizes, suitable for uses ranging from tabletop demonstrations to research in wind tunnels. For best viewing, plume illuminated by bright, focused incandescent spotlight at right angle to viewing direction. Viewing further enhanced by coating walls of test chamber with flat, dark color to minimize reflections and increase contrast.
Document ID
19930000764
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Robelen, David B.
(NASA Langley Research Center, Hampton, VA.)
Date Acquired
August 16, 2013
Publication Date
December 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 12
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
LAR-15058
Accession Number
93B10764
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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