Accession Number:

AD0636972

Title:

TECHNIQUES FOR DROP SIZE MEASUREMENT BY DIRECT PHOTOGRAPHY AND ELECTRONIC PARTICLE SIZE ANALYSIS

Descriptive Note:

Technical rept.

Corporate Author:

ROCKET PROPULSION ESTABLISHMENT WESCOTT (UNITED KINGDOM)

Personal Author(s):

Report Date:

1965-12-01

Pagination or Media Count:

24.0

Abstract:

A photographic technique is described which overcomes many of the problems encountered in measuring the droplet size distribution in sprays. Droplet photographs were analysed using a Mullard Particle Size Analyser as recommended in the text and it is shown that, for photographs in which the depth of field is less than the spray thickness, a high contrast emulsion leads to errors. In general it is better to avoid out-of-focus drops, but a method is suggested which permits the results to be corrected provided the extent of the spray is large compared to the depth of field.

Subject Categories:

  • Physical Chemistry
  • Test Facilities, Equipment and Methods
  • Photography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE