Abstract

The use of thermally assisted fluorescence (THAF) for temperature measurements has been investigated in a laminar, premixed C2H2/O2/Ar flame seeded with Ga atoms. Average temperature measurements were made with an uncertainty of less than ±100 K in flames >2150 K and were found to be in agreement with sodium line reversal temperature measurements and equilibrium calculations. In both fuel rich and lean flames spanning equivalence ratios from 0.75 to 2.0, it was found that composition influenced the measured temperatures, resulting in an accuracy of ±100 K over this range of flame conditions. Dilution of the flame with N2 rather than Ar resulted in measured temperatures that were substantially higher than the calculated adiabatic flame temperature, indicating that, in this case, a partial Boltzmann equilibrium is not established among the collisionally populated levels of Ga used for the measurement. These results indicate that THAF with gallium as the thermometric species is limited to cases in which an inefficient quencher, such as a rare gas, is the primary diluent.

© 1991 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Picosecond planar laser-induced fluorescence measurements of OH A2 Σ+ (ν′ = 2) lifetime and energy transfer in atmospheric pressure flames

Frank C. Bormann, Tim Nielsen, Michael Burrows, and Peter Andresen
Appl. Opt. 36(24) 6129-6140 (1997)

Temperature dependence of laser-induced fluorescence of nitric oxide in laminar premixed atmospheric-pressure flames

A. V. Mokhov, H. B. Levinsky, and C. E. van der Meij
Appl. Opt. 36(15) 3233-3243 (1997)

Background corrections for laser-induced-fluorescence measurements of nitric oxide in lean, high-pressure, premixed methane flames

D. Douglas Thomsen, F. Frank Kuligowski, and Normand M. Laurendeau
Appl. Opt. 36(15) 3244-3252 (1997)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription