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LABORATOIRE D'ELECTROTECHNIQUE ET D'ELECTRONIQUE DE PUISSANCE DE LILLE

Recherche, Développement et Innovation en Génie Electrique

Séminaire Equipe OMN, 31 aout 2018

Le vendredi 31 aout 2018, Prof. Chijie ZHUANG qui vient de l’Université de Tsinghua (Chine), effectuera un séminaire sur le thème :

Shock Wave in Atmospheric Air Gap Leader Discharge: Observation and Simulation Results

Date : Lundi 2 juillet 2018 à 13h30
Lieu : Salle 2S53 à Lilliad

A leader is an electric discharge mechanism in long-air-gap discharges, which is generally described by a set of convection-diffusion equations, Poisson’s equation and Navier-Stokes equations. We report the shockwave phenomenon in an air-gap leader discharge observed using a Mach-Zehnder interferometer with a time resolution of several microseconds. The continuous temporal evolution of the shock wave and the plasma channel was recorded and reproduced with a thermo-hydrodynamic model discretized by MUSCL and TVDRK schemes, with the measured current as the model input. The simulation results for the shock wave front positions and the plasma channel radius showed good consistency with the experimental measurements. Detailed thermal parameters obtained through the simulation showed that continuous energy injection by the current results in a temporary over-pressure process in the plasma channel and produces the shock wave.