Adaptation of a Cascade Impactor to Flight Measurement of Droplet Size in Clouds

One of 5,164 reports in the series: NACA Research Memorandums available on this site.

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Description

A 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. ... continued below

Creation Information

Levine, Joseph & Kleinknecht, Kenneth S. September 18, 1951.

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This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and one other and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 167 times . More information about this report can be viewed below.

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Titles

  • Main Title: Adaptation of a Cascade Impactor to Flight Measurement of Droplet Size in Clouds
  • Series Title: NACA Research Memorandums

Description

A 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.

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Identifier

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  • : 81N73153
  • URL: http://hdl.handle.net/2060/19810068731 External Link
  • Report No.: NACA-RM-E51G05
  • Center for AeroSpace Information Number: 19810068731
  • Archival Resource Key: ark:/67531/metadc53539

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National Advisory Committee for Aeronautics Collection

The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA).

Technical Report Archive and Image Library

This selection of materials from the Technical Report Archive and Image Library (TRAIL) includes hard-to-find reports published by various government agencies. The technical publications contain reports, images, and technical descriptions of research performed for U.S. government agencies. Topics range from mining, desalination, and radiation to broader physics, biology, and chemistry studies. Some reports include maps, foldouts, blueprints, and other oversize materials.

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Creation Date

  • September 18, 1951

Added to The UNT Digital Library

  • Nov. 11, 2011, 7:22 p.m.

Description Last Updated

  • Jan. 27, 2017, 2:36 p.m.

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Citations, Rights, Re-Use

Levine, Joseph & Kleinknecht, Kenneth S. Adaptation of a Cascade Impactor to Flight Measurement of Droplet Size in Clouds, report, September 18, 1951; (digital.library.unt.edu/ark:/67531/metadc53539/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.