Experiments in Fluids

, Volume 48, Issue 1, pp 111–119

Processing of individual rainbow signals

Authors

  • Sawitree Saengkaew
    • Faculty of Engineering, Centre of Excellence in Particle TechnologyChulalongkorn University
    • UMR 6614/CORIA, CNRS/Université et INSA de Rouen
  • Tawatchai Charinpanikul
    • Faculty of Engineering, Centre of Excellence in Particle TechnologyChulalongkorn University
  • Claire Laurent
    • ONERA/DMAE 02
  • Yves Biscos
    • ONERA/DMAE 02
  • Gérard Lavergne
    • ONERA/DMAE 02
  • Gérard Gouesbet
    • UMR 6614/CORIA, CNRS/Université et INSA de Rouen
    • UMR 6614/CORIA, CNRS/Université et INSA de Rouen
Research Article

DOI: 10.1007/s00348-009-0717-3

Cite this article as:
Saengkaew, S., Charinpanikul, T., Laurent, C. et al. Exp Fluids (2010) 48: 111. doi:10.1007/s00348-009-0717-3

Abstract

The characterization of droplets under evaporation is still a challenge, especially to evaluate the droplet temperature. A promising technique is rainbow refractometry, which determines instantaneously the refractive index (temperature) and size of fuel droplets by characterizing the light distribution around the rainbow angle. As for other techniques, recorded signals must be efficiently processed to extract relevant information. This paper is devoted to the description of a new powerful processing strategy including the ripple structure which permits to increase the measurement accuracy. The algorithm has also been successfully applied to experimental rainbow signals recorded at ONERA-Toulouse with a special attention devoted to the measurement of ethanol droplets.

Copyright information

© Springer-Verlag 2009