Active Flow Control of a Flame-Holder Wake Using Nanosecond-Pulsed Surface-Dielectric-Barrier Discharge in a Low-Pressure Environment

Flame holders are widely used in ramjet combustors. We propose using surface nanosecond-pulsed surface-dielectric-barrier-discharge (NS-DBD) to manipulate the flame-holder flow field experimentally. The electrical characteristics, induced performance, and temperature distribution of NS-DBD were investigated via optical measurement system. In filamentary discharge mode, energy rose with decrease ambient pressure. pattern changed from filamentous uniform around 5 kPa. Starting-vortex intensity jet-flow angle relative wall increased at low recirculation zone was asymmetrical pressures above 60 zone’s area length smaller lower pressures, but when actuator operating, nearly 11.8% longer. vorticity When pulse width 300 ns, had greatest effect, velocity region (LVR) fuel–air-mixture residence time (FMRT) could be by 31.8% 20.5%, respectively. a widening effect on LVR Rising-edge should increase pressure optimize increase; it ns FMRT increase. conclude that is viable method controlling airflow