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Mesures 1D mono-coups multi-espèces de température et de concentration par ajustement de spectres de diffusion Raman spontanée : application dans les flammes aérobies et les oxyflammes turbulentes

Abstract : Recent progress in experimental devices and simulation of high-temperature Raman spectra enable the implementation of a spectral fitting method to solve single-shot Spontaneous Raman Scattering spectra collected in turbulent flames. In this study, this post-processing method, associated to a specific experimental set-up, has been developed to extend measurements to several cases of non-Raman friendly flames where matrix inversion or hybrid methods are usually limited. In a two-phase flame, N2 Raman thermometry has been used to overcome issues from Mie scattering of droplets. The implementation of a CH4 Raman thermometry and a minimization procedure of C2 emission in the data post-processing allowed the achievement of multi-scalar cartographies (temperature and all major species) throughout the recirculation zone of a slightly sooting turbulent flame stabilized on a bluff-body burner. A thermometry based on the minimization of CO2 Raman spectrum has also been developed and tested during a measurement campaign in a semi-industrial scale installation designed for the study of oxyfuel gas turbine cycle in the aim of carbon capture and sequestration.
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https://tel.archives-ouvertes.fr/tel-02023198
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Submitted on : Monday, February 18, 2019 - 2:05:08 PM
Last modification on : Thursday, November 28, 2019 - 3:53:44 AM
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  • HAL Id : tel-02023198, version 1

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Florestan Guichard. Mesures 1D mono-coups multi-espèces de température et de concentration par ajustement de spectres de diffusion Raman spontanée : application dans les flammes aérobies et les oxyflammes turbulentes. Mécanique des fluides [physics.class-ph]. Normandie Université, 2018. Français. ⟨NNT : 2018NORMR114⟩. ⟨tel-02023198⟩

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