Accession Number : ADA290553

Title :   Development and Application of Fluorescent Diagnostics to Fundamental Droplet and Spray Problems.

Descriptive Note : Final rept. 16 May 91-15 May 94,

Corporate Author : TEXAS UNIV AT DALLAS RICHARDSON DEPT OF CHEMISTRY

Personal Author(s) : Melton, Lynn A.

PDF Url : ADA290553

Report Date : 12 SEP 1994

Pagination or Media Count : 11

Abstract : This final report describes work carried out under ARO grant DAALO3-91-G-0033 for the development and application of fluorescent diagnostics to fundamental droplet problems. Particular emphasis has been placed on attempts to understand the heating, evaporation, and internal circulation processes of sub-millimeter droplets. At the University of Texas at Dallas, a new type of exciplex fluorescence thermometer, based on the temperature dependent shift of the exciplex band, has been developed and applied to thermometry of evaporating droplets and surface liquids. Algorithms and programs have been developed and disseminated for the correction of "droplet slicing images" (DSI) for the effects of refraction by the front hemisphere of the droplet. At United Technologies Research Center, DSI techniques have been used to demonstrate unequivocally that aerodynamic shear can induce internal circulation in sub-millimeter droplets and to show that droplets rotate and interact with the surrounding gas phase flow field.

Descriptors :   *FLUORESCENCE, *LASER APPLICATIONS, *DROPS, *DIAGNOSIS(GENERAL), *FUEL SPRAYS, SHEAR PROPERTIES, ALGORITHMS, TEMPERATURE, LIQUIDS, RESEARCH FACILITIES, OPTICAL IMAGES, VAPOR PHASES, INTERNAL, THERMOCHEMISTRY, REFRACTION, EVAPORATION, CIRCULATION, SPRAYS, AERODYNAMICS, GAS FLOW.

Subject Categories : Optical Detection and Detectors
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE