Abstract
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.
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Taro Hirasawa: He received his B. Eng., M. Eng. and D. Eng. Degrees, all from Mechanical Engineering Department of Keio University in 1995, 1997 and 2000, respectively. He first worked at Case Western Reserve University as research associate in 2000-2002. He is currently assistant professor at Department of Mechanical Engineering, Chubu University since 2002. His research interests are fundamental characteristics of premixed flame, micro combustor, and laser diagnostics.
Takahiro Kaneba: He received B. Sc. in Department Physics in 2000 from Ehime University and M. Eng. in Energy Engineering and Science in 2002 from Nagoya University and D. Ac. (Doctor of Academic) in Department of Fusion Science in 2005 from Graduate University for Advanced Studies. He worked in Center for Advanced Metrology, Chubu University as post doctoral fellow. His research interests are gas temperature measurement by LIF.
Yuichi Kamata: He received his Ph.D. in Physics in 1995 from Nagoya University. He worked in Research Center for Advanced Energy Conversion, Nagoya University as a lecturer in 1997 – 2000. He works in Noritake Company Limited as an technical adviser since 2001. His research interests are X-ray astronomy in Astrophysics, Atmospheric and Environmental Science and Thermal Visualization.
Katsunori Muraoka: He received his B. Eng., M. Eng. and D. Eng. Degrees, all from Mechanical Engineering Department of Kyushu University in 1963, 1965 and 1970, respectively. He first worked at Research Institute for Applied Mechanics, and then at Interdisciplinary Graduate School of Engineering Sciences of the same University until his retirement in 2004. He moved to the current position in April 2004. His research interests are plasma physics and gas discharge phenomena, in particular developments of laser-aided diagnostics of plasmas and gases. In this field, he published a book “Laser-aided diagnostics of plasmas and gases” (Institute of Physics Publishing, U. K., 2001).
Yuji Nakamura: He received his M. Sc.(Eng) degree in Mechanical Engineering in 1995 from Nagoya University and his Ph.D. in 2000 from same university. He worked in University of Kentucky as visiting research assistant in 1996-1997. He joined in Department of Mechanical Engineering, Nagoya University as research associate and became associate professor at Center for Integrated Research and Engineering and EcoTopia Science Institute, Nagoya University. He also worked at National Institute of Standards and Technology (NIST) in 2000-2001 as visiting professor. He is currently associate professor at Division of Mechanical and Space Engineering, Hokkaido University since 2005. His research interests are Combustion, Fire Science, and Safety Engineering.
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Hirasawa, T., Kaneba, T., Kamata, Y. et al. Temperature dependence of intensities of laser-induced fluorescences of ethylbenzene and naphthalene seeded in gas flow at atmospheric pressure. J Vis 10, 197–206 (2007). https://doi.org/10.1007/BF03181831
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DOI: https://doi.org/10.1007/BF03181831