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Measurement of the temperature distribution within monodisperse combusting droplets in linear streams using two-color laser-induced fluorescence

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Abstract

Two-color laser-induced fluorescence can be use to perform space-averaged flying droplet temperature measurements. In this paper, the possibility to extend this technique to the measurement of the temperature distribution within a moving combusting droplet is considered and demonstrated. This technique may provide new experimental data related to the heat diffusion in liquid fuel droplets injected in high-temperature gas streams, for example, in combustion chambers. The main principles of the technique and the data reduction process are discussed, and a test on combusting a monodisperse ethanol droplets (200 μm in diameter) stream is presented.

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Abbreviations

a i , b i :

temperature sensitivity coefficients for i th spectral band

C :

molecular concentration of fluorescent tracer

D :

droplet diameter

I 0 :

incident laser beam intensity

I f :

fluorescence intensity

K opt :

optical constant

K spec :

spectroscopic constant

V c :

collection volume

R f :

fluorescence ratio

T :

absolute temperature

T i :

injection temperature

V i :

injection velocity

( x, y , z):

spatial coordinates

β :

temperature sensitivity coefficient

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Acknowledgments

This work is supported by the European Community in the framework of the MUSCLES contract, growth project GRD1-2001-40198.

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Authors and Affiliations

  1. LEMTA (CNRS, UMR 7563), 2 avenue de la Forêt de Haye, BP 160, F-54504, Vandoeuvre-lès-Nancy Cedex, France

    G. Castanet, P. Lavieille, M. Lebouché & F. Lemoine

Authors
  1. G. Castanet
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  2. P. Lavieille
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  3. M. Lebouché
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  4. F. Lemoine
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Corresponding author

Correspondence to F. Lemoine.

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Castanet, G., Lavieille, P., Lebouché, M. et al. Measurement of the temperature distribution within monodisperse combusting droplets in linear streams using two-color laser-induced fluorescence. Exp Fluids 35, 563–571 (2003). https://doi.org/10.1007/s00348-003-0702-1

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  • DOI: https://doi.org/10.1007/s00348-003-0702-1

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