Measurement of Droplet Size in Sprinkler Sprays.
Measurement of Droplet Size in Sprinkler Sprays.
(1758 K)
Lawson, J. R.; Walton, W. D.; Evans, D. D.
NBSIR 88-3715; 51 p. April 1988.
Sponsor:
General Services Admin., Washington, DC
Available from:
National Technical Information Service
Order number: PB88-215454
Keywords:
droplets; water sprays; sprinkler systems
Abstract:
A computer-controlled video shadowgraph was used to
collect data on the spray characteristics of a
commercially available sprinkler head. A total of 15
tests were carried out that measured spray
characteristics at different positions close to the
sprinkler head. Tests were conducted using two
different water flow rates, one and two liters per
second. Droplet diameters were measured and analyzed to
produce graphic presentations of normalized cumulative
volume and cumulative number vs. droplet diameter data.
In addition, a comparison was made between the droplet
diameters measured using the video analyzer and droplet
samples collected in a light oil and measured manually
using a microscope. The data are also compared with
results found in the literature. Data on more than
66,000 spray droplets were collected and used for
analysis in the development of this report.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899