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ISSN オンライン: 2642-0554

TURBULENT TRANSPORTS MODELING IN A HYDROGEN-AIR DIFFUSION FLAME

Sylvain Serra
Institut Pprime - UPR 3346 - CNRS - ENSMA - Universite de Poitiers BP 40109, 86961 Futuroscope, France

Vincent Robin
Institut Pprime - UPR 3346 - CNRS - ENSMA - Universite de Poitiers BP 40109, 86961 Futuroscope, France

Arnaud Mura
Institut Pprime - UPR 3346 - CNRS - ENSMA - Universite de Poitiers BP 40109, 86961 Futuroscope, France

Michel Champion
Institut Pprime - UPR 3346 - CNRS - ENSMA - Universite de Poitiers BP 40109, 86961 Futuroscope, France

要約

Turbulent transports in hydrogen-air flame are investigated by introducing relevant scalar variables which allow to identify and treat separately density effects induced by both mixing and reactive processes. The algebraic models proposed for the turbulent scalar flux and the turbulent kinetic energy allow to recover and generalise well-known previously established relations and highlight the possible occurrence of counter-gradient turbulent diffusion. The calculation of a practical turbulent diffusion hydrogen-air flame is also performed and exhibits a strong production of turbulence near stoichiometric conditions.