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Adaptation of a Cascade Impactor to Flight Measurement of Droplet Size in CloudsA cascade impactor, an instrument for obtaining: the size distribution of droplets borne in a low-velocity air stream, was adapted for flight cloud droplet-size studies. The air containing the droplets was slowed down from flight speed by a diffuser to the inlet-air velocity of the impactor. The droplets that enter the impactor impinge on four slides coated with magnesium oxide. Each slide catches a different size range. The relation between the size of droplet impressions and the droplet size was evaluated so that the droplet-size distributions may be found from these slides. The magnesium oxide coating provides a permanent record. of the droplet impression that is not affected by droplet evaporation after the. droplets have impinged.
Document ID
19810068731
Acquisition Source
Legacy CDMS
Document Type
Other - NACA Research Memorandum
Authors
Levine, Joseph
(National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Kleinknecht, Kenneth S.
(National Advisory Committee for Aeronautics. Lewis Flight Propulsion Lab. Cleveland, OH, United States)
Date Acquired
August 11, 2013
Publication Date
September 18, 1951
Subject Category
Instrumentation And Photography
Report/Patent Number
NACA-RM-E51G05
Report Number: NACA-RM-E51G05
Accession Number
81N73153
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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