Accession Number : ADA332433

Title :   Fluorescent Diagnostics and Fundamental Droplet Processes.

Descriptive Note : Final progress rept. 15 May 94-30 Jun 97

Corporate Author : TEXAS UNIV AT DALLAS RICHARDSON

Personal Author(s) : Melton, Lynn A.

PDF Url : ADA332433

Report Date : SEP 1997

Pagination or Media Count : 44

Abstract : This project is directed toward the development and use of fluorescent diagnostics in the understanding of the heating and evaporation of droplets and sprays. (1) At the University of Texas at Dallas (UTD), a major focus has been the determination of the transient temperature field within droplets which fall into hot ambient gas. Oxygen resistant high temperature fluorescence shift thermometers were studied and the oxygen quenching behavior of a previously studied fluorescent thermometry system (PYPYP) was characterized. Other fluorescent diagnostics work, including studies of the evaporation of liquid fuel films and characterization of fuel/methanol mixtures have accompanied this focus on fundamental studies of droplet heating. (2) At United Technologies Research Center (UTRC), the major focus has been the design and operation of a droplet slicing imaging experiment to determine conclusively the role of aerodynamic-induced shear forces, especially at high pressures, in causing internal circulation within droplets. UTRC has also investigated diagnostics appropriate for study of liquid instabilities near the critical point. These experiments utilized acoustic disturbances in UTRC's high pressure pulse tube facility and Raman imaging to obtain images of O2 in and around a LOX droplet stream.

Descriptors :   *FLUORESCENCE, *DROPS, *SPRAYS, TRANSIENTS, FILMS, RESEARCH FACILITIES, QUENCHING, FUELS, METHANOLS, DIAGNOSIS(GENERAL), ACOUSTICS, BEHAVIOR, EVAPORATION, CIRCULATION, RAMAN SPECTRA, THERMOMETERS, LIQUID OXYGEN.

Subject Categories : Physical Chemistry
      Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE