The present study has been carried out with the aim of developing a technique for measuring two-dimensional gas temperature profiles based on two-color fluorescence induced by a one-color laser. The laser sheet of the fourth harmonic (266 nm) from a Nd:YAG laser induced fluorescence in species doped in a nitrogen gas flow. The LIF spectra of seven fluorescent species, namely acetone, methylethylketone, acetaldehyde ethylbenzene, anisole, aniline, and naphthalene, were measured to select the best prospective pair of fluorescent species for this technique. Ethylbenzene and naphthalene show relatively high LIF intensities and their LIF spectra overlap less with each other than with other species. Also, ethylbenzene has a high temperature dependence while naphthalene has a low temperature dependence. Thus by selecting one portion of wavelengths in the range where ethylbenzene or naphthalene is dominant, the temperature of the gas can be determined using the ratio of LIF intensities of the mixture at the two wavelengths with good temperature sensitivity. In addition, a general principle is presented for finding out an optimum pair of wavelengths to obtain a good temperature sensitivity in those LIF spectra.
Temperature Measurement Laser Induced Fluorescence Fluorescent Species Temperature Sensitivity Laser Sheet
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Baranger, P., Orain, M. and Grisch, F., Fluorescence Spectroscopy of Kerosene Vapour: Application to Gas Turbines, 43rd AIAA Aerospace Science Meeting and Exihbit, (2005), 828.Google Scholar
Funatani, S., Fujisawa, N. and Ikeda, H., Simultaneous measurement of temperature and velocity using two-colour LIF combined with PIV with a colour CCD camera and its application to the turbulent buoyant plume, Meas. Sci. Technol., 15 (2004), 983–990.CrossRefGoogle Scholar
Koban, W., Schorr, J. and Schulz, C., Oxygen-distribution imaging with a novel two-tracer laser-induced fluorescence technique, Appl. Phys. B, 74 (2002), 111–114.CrossRefGoogle Scholar
Melton, L. A., Spectrally Separated Fluorescence Emissions for Diesel Fuel Droplets and Vapor, Appl. Opt., 22 (1983), 2224–2226.CrossRefGoogle Scholar
Sakakibara, J. and Adrian, R. J., Whole Field Measurement of Temperature in Water using Two-Color Laser Induced Fluorescence, Experiments in Fluids, 26 (1999), 7–15.CrossRefGoogle Scholar
Schulz, C. and Sick, V., Tracer-LIF diagnostics: quantitative measurement of fuel concentration, temperature and fuel/air ratio in practical combustion systems, Progress in Energy and Combustion Science, 31 (2005), 75–121.CrossRefGoogle Scholar
Thurber, M. C., Grisch, F., Kirby, B. J., Votsmeier, M. and Hanson, R.K., Measurement and Modeling of Acetone Laser-Induced Fluorescence with Implications for Temperature Imaging Diagnostics, Appl. Opt., 37 (1998), 4963–4978.CrossRefGoogle Scholar