Strong background and experience in experimental study in fluids mechanics (reactive or not), optical diagnostics and post-processing of data (C, C++, Python, matlab…) will be considered CompétencesĪpplicants will hold a PhD degree in Physics or Mechanical Engineering. GUICHARD, F., BOUBERT, P., HONORÉ, D., CESSOU, A., “CO2 Spontaneous Raman Scattering: an alternative thermometry for turbulent reactive flows”, 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, Lisbon, Portugal July 16 – 19, 2018. CESSOU, “Spontaneous Raman scattering: a useful tool for investigating the afterglow of nanosecond scale discharges in air”, Applied Physics B, Lasers and Optics, 107 (2012) 229-242 DOI:10.1007/s0034-3 In the final step, the 1D Spontaneous Raman Scattering technique will be coupled to nanosecond NO-PLIF technique in the H2-air turbulent flame, first to evaluate qualitatively for different operating conditions the correlations between NO production, temperature and the different species concentrations and second to reinforce the quantification of NO signal from the simultaneous local composition and temperature measurements. These results will allow to identify the local (premixed or not) combustion regime with 3D correlation plots in the frame of density number/radial location/mixture fraction, but also to estimate the instantaneous dissipation rate from the 1D mixture fraction profiles. Considering the high amount of steam in high temperature burnt gas in the case of H2O addition, thermography based on water spectra will reinforce the procedure developed in CORIA. Secondly, instantaneous temperature and major species will be measured by Spontaneous Raman Scattering technique in turbulent H2-air flames with and without H2O addition and produce by a specific burner representative of industrial geometries, in collaboration with EM2C researchers. For that, the 1D concentration of major species ( ) on a reference Mc Kenna burner for various operating conditions of H2-O2-N2-(H2O) laminar flames will be measured by Spontaneous Raman Scattering (SRS), an advanced optical technique developed at CORIA laboratory since more than 15 years. In collaboration with the other partners, temperature dependence of the measurements will be performed in a laminar flame. In CORIA, the postdoctoral fellow will participate in the co-building of the experimental database in turbulent flames and in its physical interpretation with a postdoc fellow of PC2A laboratory. The overall objectives of this project are to build a detailed and original experimental database, to clarify the specific respective NO formation kinetics mechanisms in H2-Air flames, to study the effect of steam on the NOx emissions, and also to provide a refine data-base to validate NO production simulation in Large Eddy Simulation (LES) of turbulent hydrogen flames. Through a collaboration of 3 laboratories (CORIA, EM2C, PC2A) internationally recognized for their researches in combustion, MONTHY aims for a better understanding and modeling NOx formation in turbulent hydrogen flames. The post-doctoral position is integrated to the project MONTHY in the research French national program PEPR-H2 (of the governmental action France 2030. Section(s) CN : Fluid and reactive environments: transport, transfer, transformation processes Niveau d'études souhaité : Niveau 8 - (Doctorat) Rémunération : monthly gross 2.934€ and 4.122€ (depending of experiences) Intitulé de l'offre : M/W Post-doctoral researcher in (…) Laminar and Turbulent H2 flames characterization by advanced optical diagnostics to investigate NOX formation (H/F)ĭate de publication : mercredi 22 novembre 2023
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