Combustion of lean fuel mixtures with subcritical streamer microwave discharge

Vibrational and rotational CARS measurements of nitrogen in afterglow of streamer discharge in atmospheric pressure fuel/air mixtures

The use of nonequilibrium plasma generated by nanosecond discharges to ignite fuel/air mixtures, known as transient plasma ignition (TPI), has been shown to effectively reduce ignition delay and improve engine performance relative to spark ignition for combustion engines. While this method is potentially useful for many engine applications, at present the underlying physics are poorly understoo...

The production and evolution of atomic oxygen in the afterglow of streamer discharge in atmospheric pressure fuel/air mixtures

In this work two-photon absorption laser-induced fluorescence was used to measure oxygen atom (0) concentrations in streamer discharge afterglow in a variety of fueVair mixtures in order to account for the 0 reaction pathways in transient plasma ignition. It is demonstrated that 0 atoms are generated in high concentration (~5 x 1017 cm-3) directly below the high-voltage anode in a point-to-plan...

Predicting the Combustion Properties of Hydrocarbon Fuel Mixtures

Branching of Streamer Type Corona Discharge

The behaviour of positive streamers in air is studied in a rather homogeneous field created by a short plane-protrusion gap in air. Branching is observed to be quite limited, the velocity of the streamers increases with travel distance and “late” streamers are observed. The interaction of streamer heads can be interpreted as electrostatic repulsion, while “late” streamers seem to be attracted b...

Combustion Mode Design with High Efficiency and Low Emissions Controlled by Mixtures Stratification and Fuel Reactivity

This paper presents a review on the combustion mode design with high efficiency and low emissions controlled by fuel reactivity and mixture stratification that have been conducted in the authors’ group, including the charge reactivity controlled homogeneous charge compression ignition (HCCI) combustion, stratification controlled premixed charge compression ignition combustion, and dual-fuel com...