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Accueil du site > Thèmes de recherche > Combustion & systèmes réactifs > 1.5 Dynamique des flammes laminaires & turbulentes

1.5 Dynamique des flammes laminaires & turbulentes

1.5.1 Laminar premixed flames Freely expanding spherical flames One of the major fundamental properties of combustion is the laminar flame velocity, which despite its very straightforward definition must be carefully assessed. Among the different techniques, the outwardly spherical flame proves to be very valuable since the stretch at which the flame is submitted is perfectly known and can be then accounted for. ICARE has designed a high pressure spherical chamber that can be operated over a wide range of (...)

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1.5.2 Laminar diffusion flames with and without magnetic forces

Magnetic forces can be used to control the stability of laminar diffusion flames capitalising on the magnetic susceptibility of oxygen. Permanent magnets (ACL126) and an electromagnet (ACL140) are used at ICARE for this purpose together with laser flame tomography and laser velocimetry. Dynamics of laminar methane – air flames with and without magnetic forces have been compared. In parallel, numerical simulations have been performed taking into account the heat release, magnetic forces and (...)

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1.5.3 Turbulent flames Non-premixed turbulent flames Turbulent hydrogen – air non premixed flames (or hydrogen enriched methane – air flames) are of interest because of their lowest risk potential in burners or gas turbines, compared to premixed hydrogen mixtures. An experimental study has been conducted on the characterisation of high pressure H2/air and H2 enriched methane – air flames in the framework of a joint PhD with the Polytecnico di Milano (TH1). A specific burner has been developed for this (...)

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