Absolute and real time experimental radiative loss measurements of spherical expanding free flames: FAIRS (Fast Absolute InfraRed Sensor)—An innovative technique - CNRS - Centre national de la recherche scientifique Access content directly
Journal Articles Review of Scientific Instruments Year : 2022

Absolute and real time experimental radiative loss measurements of spherical expanding free flames: FAIRS (Fast Absolute InfraRed Sensor)—An innovative technique

Abstract

An innovative technique was developed for the direct measurement of the absolute radiant flux emitted from transient flames. The design of the experimental device, called FAIRS (Fast Absolute Infra-Red Sensor), is detailed in this work. The main concept of FAIRS is based on the combination of a carbon nano-tube-based black body as a sensitive element, coupled to a fast IR HgCdTe detector via an achromatic optical setup. A specific calibration protocol based on a laboratory blackbody (ambient to 850 °C) allows the qualification of the FAIRS for absolute radiative heat-flux measurements, with a response time less than 1 µs that was checked, thanks to pulsed laser irradiation. It is thus demonstrated that FAIRS is a good candidate for transient measurements, with a simplified calibration procedure. FAIRS was coupled with ultra-fast schlieren imaging on spherical expanding CH 4 /air and C 3 H 8 /air flames. In this condition, it is possible to correlate the real time flame diameter to its absolute radiative heat losses.
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Dates and versions

hal-03869302 , version 1 (24-11-2022)

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Mahmoud Idir, Ayan Mousse Rayaleh, Domingos de Sousa Meneses, Nadjib Semmar, Nabiha Chaumeix. Absolute and real time experimental radiative loss measurements of spherical expanding free flames: FAIRS (Fast Absolute InfraRed Sensor)—An innovative technique. Review of Scientific Instruments, 2022, 93 (9), pp.095103. ⟨10.1063/5.0101519⟩. ⟨hal-03869302⟩
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