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) : Ramshaw, C

PDF Url : AD0636972

Report Date : Dec 1965

Pagination or Media Count : 24

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.

Descriptors :   *DROPS, *SPRAYS, COMBUSTION CHAMBERS, FUEL SPRAYS, LIQUID PROPELLANT ROCKET ENGINES, MEASUREMENT, OPTICAL EQUIPMENT, PARTICLE SIZE, PHOTOGRAPHIC ANALYSIS, PHOTOGRAPHIC IMAGES, UNITED KINGDOM

Subject Categories : Physical Chemistry
      Test Facilities, Equipment and Methods
      Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE