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Experimental Evaluation of Flame Radiative Feedback: Methodology and Application to Opposed Flame Spread Over Coated Wires in Microgravity

  • Augustin GuibaudEmail author
  • Jean-Marie Citerne
  • Jean-Louis Consalvi
  • Osamu Fujita
  • Jose Torero
  • Guillaume Legros
Article
  • 33 Downloads

Abstract

The objective of this work is to quantify for the first time soot-related radiative heat transfer in opposed flow flame spread in microgravity. This article presents experimental results obtained in parabolic flight facilities. A flame is established over a solid cylindrical polyethylene coated metallic wire and spreads at a steady rate, in low velocity flow conditions allowed by the absence of buoyancy. Implementing the Broadband Modulated Absorption/Emission technique, the two-dimensional fields of soot volume fraction and temperature are obtained for the first time in flame spread configuration over an insulated wire in microgravity. The consistency of the results is assessed by comparing results from independent experimental runs. From these fields, radiative losses attributed to soot in the flame are computed at each location. This map of radiative losses together with the profile of the wire surface are then used as inputs to a novel experimental approach that enables the assessment of soot radiative heat feedback to the wire. Results are extracted from a specific case of a flame propagating over a polyethylene coated Nickel–Chrome wire at nominal pressure. The oxidizer, composed of 19% oxygen and 81% nitrogen in volume is blown at opposed flow parallel to the wire at a velocity of \(200\,\hbox {mm}\cdot\hbox{s}^{-1}\). This new approach provides the first detailed quantitative measurements which are required to check the relevance of heat transfer models under development, therefore to better understand the mechanisms driving flame spread in microgravity.

Keywords

Soot Microgravity Radiative heat transfer 

Notes

Acknowledgements

The authors feel grateful to the Centre National dEtudes Spatiales for its financial support under Contract No. 130615. Osamu Fujita is supported by JAXA under the project of FLARE, a candidate experiment for the third stage use of JEM/ISS.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.CNRS, UMR 7190, Institut Jean Le Rond d’AlembertSorbonne UniversitéParisFrance
  2. 2.CNRS, UMR 7343, IUSTIAix-Marseille UniversitéMarseilleFrance
  3. 3.Division of Mechanical and Space EngineeringHokkaido UniversitySapporoJapan
  4. 4.Department of Fire Protection EngineeringUniversity of MarylandCollege ParkUSA

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