Nonlinear Spectroscopy of Multicomponent Droplets and Two- and Three- Dimensional Measurements in Flames
Abstract
Significant progress has been made in the following areas: (1) Nonlinear spectroscopy of micrometer sized droplets, and (2) Development and application of two- and three-dimensional scalar and velocity measurement techniques in flames. In the nonlinear spectroscopy area, the following achievements are reported: (1) Fluorescence seeding of the stimulated Raman scattering (SRS) in order to increase the detectivity (by as much as 10X) of minor species in a multicomponent liquid droplet that contains a fluorescent dye; (2) Temporal precession of the SRS as a means of determining the shape distortion (7 parts out of 10(exp 3)) of a flowing droplet because of inertial force; (3) Preliminary measurements of the relative evaporation rates of 15 droplets in a segmented stream where the few lead droplets evaporate faster than the remaining droplets; and (4) Suppression of lasing by the SRS and amplification of the SRS in microdroplets, leading to an increased SRS signal. . .. Droplets, Spray, Evaporation rate, Shape distortion, Precession of cavity modes and Lasing, Premixed flames, Nonpremixed flames, Rayleigh scattering, Laser-induced fluorescences, Three-dimensional measurements, Laser diagnostics, Flow imaging, Supersonic flow, Mixture fraction and Scalar dissipation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 05, 1993
- Accession Number
- ADA264341
Entities
People
- Marshall B. Long
- Richard K. Chang
Organizations
- Yale University