Two-dimensional (2D) temperature images of turbulent hot nitrogen flows have been obtained by use of a novel technique involving fluorescence lifetime imaging. Nitrogen flows were doped with naphthalene vapor. The fluorescence lifetime of naphthalene decreases from 180 ns at 25 °C to 35 ns at 450 °C, and this temperature dependence can be used to calculate the temperature from the fluorescence lifetime in oxygen-free environments. With the current apparatus and with naphthalene as the fluorescent dopant, the error in the absolute temperature was estimated to be ±15 °C in the range of 25 to 450 °C. This application demonstrates that fluorescence lifetime imaging, which does not depend on the absolute concentration on the fluorescent dopant, may be useful in a variety of turbulence, temperature, and other combustion-related studies.

PDF Article

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
Login to access OSA Member Subscription