Accession Number : ADA299119

Title :   Use of Maximum Entropy Principle as a Guide in Design of Spray Nozzles.

Descriptive Note : Final technical rept. 15 Jun 92-14 Aug 95,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL

Personal Author(s) : Tankin, Richard S. ; Chin, Long P. ; Hsing, P. C.

PDF Url : ADA299119

Report Date : 21 AUG 1995

Pagination or Media Count : 44

Abstract : The maximum entropy model predicted, under certain operating conditions, that a spray will have a bimodal size distribution. Experiments were performed that verified this prediction. In searching the literature, other researchers have observed bimodal size distributions over limited range of operation. Their experimental results were compared with the calculated values and they agreed. Experiments were performed on the disentegration of a cylindrical liquid jet (Rayleigh problem). This flow results in a very strong bimodal size distribution consisting of primary drops and satellite drops. The maximum entropy theory was modified to account for non-sphericity of the droplets. The computed size and velocity distributions (non-Gaussian) agreed with theory. Experiments were also performed on a heated cylindrical liquid jet. The maximum entropy theory was extended to include not only size and velocity distributions but also temperature distributions. There is agreement between theory and experiments.

Descriptors :   *LIQUID JETS, *SPRAY NOZZLES, THERMAL PROPERTIES, VELOCITY, SIZES(DIMENSIONS), EXPERIMENTAL DESIGN, DROPS, FLOW, DUAL MODE, DISTRIBUTION FUNCTIONS, ENTROPY.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE