The interaction between stratified mixing layers of undiluted hydrogen and air as they undergo forced ignition in quiescent surroundings is studied using two-dimensional direct numerical simulations. Ignition is initiated through energy addition to a spark kernel of specified diameter via a source term in the energy transport equation. Flame structure and propagation behavior employing detailed chemistry have been investigated. Effects on flame front speed and radical formation resulting from changes to the initial air temperature are examined. Furthermore, the domain pressure has been varied in order to investigate its effect on ignition flame structure and propagation behavior.
Direct Numerical Simulation of Spark-Ignited Hydrogen/Air Stratified Mixtures
MAGI, Vinicio;
2007-01-01
Abstract
The interaction between stratified mixing layers of undiluted hydrogen and air as they undergo forced ignition in quiescent surroundings is studied using two-dimensional direct numerical simulations. Ignition is initiated through energy addition to a spark kernel of specified diameter via a source term in the energy transport equation. Flame structure and propagation behavior employing detailed chemistry have been investigated. Effects on flame front speed and radical formation resulting from changes to the initial air temperature are examined. Furthermore, the domain pressure has been varied in order to investigate its effect on ignition flame structure and propagation behavior.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
