Accession Number:

ADA149849

Title:

Two-Dimensional Measurements of OH Concentration and Temperature in Reactive Flows.

Descriptive Note:

Final rept. Jul 81-Mar 84,

Corporate Author:

SRI INTERNATIONAL MENLO PARK CA

Personal Author(s):

Report Date:

1984-12-05

Pagination or Media Count:

39.0

Abstract:

This report describes two related efforts that have as a common objective the development of new aspects of laser-induced fluorescene for measurements in time-varying reactive flows such as turbulent flames. The first effort was the demonstration, development and study of two-dimensional fluorescence imaging in flames. This provides a spatially correlated map of the concentration of OH radicals from a single laser shot. The second effort was the development of vibrational transfer thermometry, in which upward collisional energy transfer in the A2 state of laser excited OH in flames is used to measure temperature simultaneously with OH concentration. Although a good correlation better than 5 per cent rms deviation between measured intensities and temperature was obtained in the range 1400-2700K, it has not been possible thus far to place the method on a sound fundamental, theoretical footing. Originator-supplied keywords include Laser-induced fluorescence, Transfer ratios, Quenching rates, Rotational distributions.

Subject Categories:

  • Lasers and Masers
  • Atomic and Molecular Physics and Spectroscopy
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE