Nitrogen oxides chemistry
Although many PAC experiments demonstrated combustion enhancement, several studies report an increase in NOx emissions. The kinetic pathways leading to NOx formation in the second stage of a sequential combustor assisted by Nanosecond Repetitively Pulsed Discharges (NRPDs) have been studied. For this purpose, Large Eddy Simulation (LES) associated with an accurate description of the combustion/NOx chemistry and a phenomenological model of the plasma kinetics has been used. Figure LES-PAC-NOX shows the production rate of NO in the sequential burner used for this study. More details in this publication.
Figure LES-PAC-NOX: Planar cut through the second stage of the sequential combustor used for experiments and simulations at the CAPS lab., ETH Zürich. The planar cut is a snapshot during PAC and is colored by the NO chemical source term with two iso-contours of progress variable C. More details in this journal publication.
