Sciences & Société
Soutenance de thèse : Khriscia UTRIA SALAS
Study of stabilisation and development of a downward inverse diffusion flame for an industrial process optimisation
Doctorante : Khriscia UTRIA SALAS
Laboratoire INSA : CETHIL
Ecole doctorale : ED162 : Mécanique, Energétique, Génie Civil, Acoustique de Lyon
Combustion has been the cornerstone of industrial development for nearly two centuries, providing heat for many industrial processes and accounting for over 80% of the power used by turbines to generate electricity. Over the years, much progress has been made in understanding the fundamental science of combustion. Nevertheless, regulatory and competitive forces are driving the need for combustion equipment with better performance, lower environmental impact, and greater flexibility, all at a reasonable cost (e.g. Paris agreement 2015, UN Climate Change Conference (COP26) 2021) .
Keep in mind that the existing energy system is primarily non-renewable, using carbon- based energy sources. The new energy transition challenges require installing and integrating a new renewable energy system while securing the supply and resilience of the actual demand. Hydrogen, considered by many the clean alternative fuel, seems to be one of the answers. Despite the associated security issues, developing this technology contributes to countries meeting their climate goals, boosting green growth and creating sustainable jobs.
This thesis is part of the actions carried out at the collaborative laboratory RAInBOV that associates the Cethil and the company RSA. They specialise in the manufacture of sapphire crystals, mainly used in the field of watchmaking and glass. Their production requires fusing the raw material and crystallising it. To this effect, they use the Verneuil method, which consists of a downward vertical burner that generates an H2/O2 inverse diffusion flame located in a confined enclosure and loaded with alumina particles deposited on a crystalline gem. Within this framework, this thesis's main objective is to comprehend the aerothermochemical mechanisms present in this configuration. Concretely, the stabilisation, the structure and the development of the flames produced by this particular configuration and the thermal behaviour of the crystal growth environment are analysed.
Amphithéâtre Emilie du Châtelet (Bibliothèque Marie Curie) - Villeurbanne.