Effect of rise time on nanosecond pulsed surface dielectric barrier discharge actuator

Numerical verification of the two-spike-current behavior in the initial stage of plasma formation in a pulsed surface dielectric barrier discharge

“…It is agreed that under a pulsed voltage with a fast ns rising and falling edge, the primary discharge with streamer-like morphology and the secondary discharge with diffused morphology will appear at the rising regime and decaying phase of the pulsed voltage, respectively [15,16]. However, as the rise time changes, some of the discharge characteristics may change, such as discharge ignition, plasma uniformity, thrust and so on [9,18,19]. In our previous studies of ns SDBD, a discharge current with two distinct spikes during the rising edge of the voltage was measured, and the two current spikes presented two typical behaviors under different electrode gaps [20][21][22][23].…”

“…But when a nanosecond pulsed voltage is applied, the EHD force seems to be not so prominent as in an AC SDBD. However, some improved characteristics emerge, such as more diffuse plasma distribution, more active particles, lower heat loss, strong shock waves in airflow control, and so on [7][8][9]. Although a number of investigations have been conducted to study the characteristics and aerodynamic applications of nanosecond pulsed SDBD in atmospheric pressure air, the understandings of airflow control mechanisms are still insufficient.…”

“…For example, initially it was thought that the main reasons for ns SDBD airflow control are the shock waves, while the body force plays the key role in the AC SDBD airflow control, which is more likely to induce vortexes [10,11]. But recently, many studies have found that vortexes and lift and drag forces also arise in ns SDBD [8,9,12,13]. Zhang et al [12] pointed out that more significant hydrodynamic effect could be generated during a shorter rise time with the propagation of surface ionization wave.…”

Characteristics of high-repetition-rate bipolar pulse DBD under various electrical conditions in atmospheric-pressure air

“…In this graph, the applied voltage is an oscillating pulse wave, and a multiple-current pulse phenomenon occurs, where the current is discharged a total of three times during the rising moment [33]. While tens of NPDBDs produce one current peak, the presence of three current peaks in this study is thought to be due to the relatively long rise time [34]. Additionally, the total current is around 1.5 A, which agrees with the results in figure 2.…”

Spatio-temporal evolution of ion current extracted from pulsed dielectric barrier discharge

“…Another advantage of exploiting pulsed voltage is the ability to generate a strictly defined number of SDBD pulses, which releases an extremely precise dosage of the input energy. Studies of the pulsed SDBD by various authors [39,[41][42][43][44] demonstrated the dependence of the discharge properties on the pulsed voltage parameters, such as the voltage rise time, the pulse active time, and the polarity of a HV pulse. So, the use of a pulsed voltage to create an SDBD seems to be an enticing prospect owing to the flexible regulation of the discharge regimes and parameters.…”