Experiments in Fluids

, Volume 48, Issue 1, pp 111–119

Processing of individual rainbow signals

  • Sawitree Saengkaew
  • Tawatchai Charinpanikul
  • Claire Laurent
  • Yves Biscos
  • Gérard Lavergne
  • Gérard Gouesbet
  • Gérard Gréhan
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

Authors and Affiliations

  • Sawitree Saengkaew
    • 1
    • 3
  • Tawatchai Charinpanikul
    • 1
  • Claire Laurent
    • 2
  • Yves Biscos
    • 2
  • Gérard Lavergne
    • 2
  • Gérard Gouesbet
    • 3
  • Gérard Gréhan
    • 3
  1. 1.Faculty of Engineering, Centre of Excellence in Particle TechnologyChulalongkorn UniversityBangkokThailand
  2. 2.ONERA/DMAE 02ToulouseFrance
  3. 3.UMR 6614/CORIA, CNRS/Université et INSA de RouenSaint Etienne du RouvrayFrance