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

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.

Creator(s):
Creation Date: September 18, 1951
Partner(s):
UNT Libraries Government Documents Department
Collection(s):
National Advisory Committee for Aeronautics Collection
Technical Report Archive and Image Library
Usage:
Total Uses: 105
Past 30 days: 3
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Creator (Author):
Creator (Author):
Date(s):
  • Creation: September 18, 1951
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.

Language(s):
Subject(s):
Keyword(s): instrumentation and photography
Contributor(s):
Serial Title: NACA Research Memorandums
Partner:
UNT Libraries Government Documents Department
Collection:
National Advisory Committee for Aeronautics Collection
Collection:
Technical Report Archive and Image Library
Identifier:
Resource Type: Report
Format: Text
Rights:
Access: Public
Statement: No Copyright, Unclassified, Unlimited, Publicly available