Abstract.
The temperature and excitation wavelength dependencies of 3-pentanone absorption and fluorescence were studied in support of planar laser-induced fluorescence (PLIF) imaging of temperature and mixture fraction in flows of practical interest. The temperature dependencies (300–875 K) of absorption and fluorescence were measured for gaseous 3-pentanoneat atmospheric pressure in a nitrogen bath gas using 248, 266, and 308 nm excitation. The results indicate that the fluorescence signal per unit mole fraction using 248 nm excitation is highly temperature-sensitive below 600 K, while the signal from 308 nm excitation is not temperature sensitive below 500 K. For quantitative measurements over a broad range of temperatures, one must choose excitation schemes carefully to balance the trade-off between measurement sensitivity and the amount of signal at the expected conditions. As an example of such a choice and to show the capabilities of ketone PLIF techniques, we include temperature and mixture fraction images of a 300–650 K heated air jet using near-simultaneous 308 and 266 nm excitation.
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Received: 29 May 2002 / Revised version: 5 November 2002 / Published online: 26 February 2003
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Koch, J., Hanson, R. Temperature and excitation wavelength dependencies of 3-pentanone absorption and fluorescence for PLIF applications . Appl Phys B 76, 319–324 (2003). https://doi.org/10.1007/s00340-002-1084-4
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DOI: https://doi.org/10.1007/s00340-002-1084-4