Influence of high-voltage pulse parameters on the propagation of a plasma synthetic jet

Abstract

In this work, a typical pin-to-pin plasma synthetic jet in static air is excited by a pulsed DC power supply. The influences of the pulse rising time, the amplitude and the repetition frequency of the pulse voltage on the jet flow have been investigated. First, using a high-speed Schlieren imaging technique, the induced shock waves and the fast jet flow generated by the plasma synthetic jet are characterized. With a deposited energy of 44 mJ per pulse, the velocity of the shock wave and the maximum velocity of the jet flow reach 320 m s −1 and 100 m s −1 , respectively. Second, when the applied voltage increases from 12.8 kV to 16 kV, the maximum jet velocity increases from 66 m s −1 to 93 m s −1 . On the other hand, as the pulse rising time varies from 50 ns to 500 ns, or the pulse repetition frequency increases from 5 Hz to 40 Hz, the jet velocity induced by the plasma synthetic jet is weakly dependent. In addition, a comparative study of the plasma synthetic jets using three commercial pulsed power supplies (XJ-15, NPG-18, and PG-30) is implemented. It reveals that the maximum jet velocity of 120 m s −1 is obtained in the case of PG-30, with the longest pulse rising time and the lowest breakdown voltage, while the maximum velocity of 33 m s −1 is detected in the case of NPG-18, even though it has the shortest pulse rising time and the highest breakdown voltage.

Diagnostics of a microhollow cathode discharge at atmospheric pressure

“…For example, such plasmas can reduce costs and improve efficiency in chip manufacturing. At present, dielectric barrier discharge plasma [7][8][9] and jet discharge plasma [10][11][12] are commonly used in atmospheric-pressure discharges. However, microdischarge devices [13][14][15] can not only produce stable plasma at atmospheric pressure, but also generate high current and a high deposition effect, making microdischarge plasma an attractive research topic.…”

Experimental Study on Ramp Shock Wave Control in Ma3 Supersonic Flow Using Two-Electrode SparkJet Actuator

“…The SPJ actuator has been a hot research topic in plasma flow control field for the past 17 years [13][14][15][16][17][18]. On the one hand, the researchers conducted a detailed parametric study of SPJ actuator [19][20][21][22][23]. On the other hand, a large number of studies focused on the working characteristic [24][25][26], efficiency improvement [27,28] and structure optimization [29][30][31] of SPJ actuator.…”

Experimental study on airfoil flow separation control via an air-supplement plasma synthetic jet

“…Zong et al [5,6] also studied the energy efficiency characteristics of actuators. Belinger [7] and Wu et al [8] used different technical approaches to explore the effects of different electrical parameters on jet performance.…”