Accession Number : ADP003138

Title :   Optical Measurements of Droplet Size Distributions: Special Considerations in the Parameter Definition for Fuel Atomizers,

Corporate Author : KARLSRUHE UNIV (GERMANY F R) INST FUER THERMISCHE STROEMUNGSMASCHINEN

Personal Author(s) : Wittig,S. ; Aigner,M. ; Sakbani,K. ; Sattelmayer,T.

Report Date : 1984

Pagination or Media Count : 10

Abstract : In evaluating fuel nozzle performance, the droplets size distribution - frequently characterized by the Sauter mean diameter - is found to be one of the dominant parameters. Using examples from ongoing experimental studies with pressurized and airblast atomizers, attention is directed towards the importance of flow parameters and size distribution in applying non-intrusive optical techniques. In particular, an optical diffraction-type particle sizer has been used in analyzing fuel sprays from airblast and pressure atomizers. It is shown that the Sauter mean diameter alone is generally not suited for describing the nozzle performance. Emphasis is directed towards the influence of the flow field on the apparent droplet size distribution explaining a variety of observations reported in other studies. (Author)

Descriptors :   *Fuel sprays, *Drops, *Atomization, *Fuel nozzles, Sizes(Dimensions), Optical properties, Diffraction, Blast, Pressurization, Diameters, Flow fields, Distribution, Laser beams, Light scattering, Measurement, Errors, West Germany

Distribution Statement : APPROVED FOR PUBLIC RELEASE