Heat-flux measurement using fibre-Bragg-grating Fabry-Pérot sensors

W. N. MacPherson, James M Kilpatrick, J. S. Barton, J. D C Jones, L. Zhang, I. Bennion

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We describe a fibre Fabry-Pérot heat-transfer sensor that is capable of performing the high-spatial-resolution measurements required in turbomachinery research. The all-fibre cavity operates as a calorimeter embedded perpendicular to the test surface. The cavity incorporates a Bragg grating as the internal reflector, producing a mechanically robust sensor suitable for aerodynamic measurements. We present experimental results from an impinging flow rig, comparing the optical sensor with a thin-film resistance gauge subjected to a step increase in heat flux of 30 kW m-2.

Original languageEnglish
Pages (from-to)1300-1304
Number of pages5
JournalMeasurement Science and Technology
Issue number12
Publication statusPublished - Dec 1999


  • Bragg grating
  • Fabry-Pérot interferometer
  • Heat-flux sensor
  • Optical fibre
  • Turbomachinery


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