Influence of SDBD plasma aerodynamic actuation on flow control by AC power supply and AC-DC power supply

Abstract

Abstract. In this paper, the excitation effect of single dielectric barrier discharge plasma actuator (SDBD) is compared by using AC power supply and AC-DC power supply. AC-DC power supply is based on the AC power supply, just adding DC component. The flow measurement is carried out by PIV technique. Results show that the excitation effect of AC power supply and AC-DC power supply increases by the increase of voltage, the range of speed field excited by AC power is greater than that of AC-DC power supply. For x direction maximum speed, excited by AC power supply is close to AC-DC, and for y direction maximum speed, AC power supply is greater than AC-DC power supply. So the excitation effect of AC power supply is better than that of AC-DC power supply for SDBD. IntroductionPlasma flow control technology which is a new active control technology has become the focus of current research that can control flow separation effectively [1]. It can increase lift, reduce resistance, shock absorption and noise reduction [2,3], so it has a wide application prospect in the field of Aeronautics and Astronautics [4]. Also plasma flow control technology has no moving parts, short response time, excitation frequency bandwidth and other excellent features [5,6].The experimental excitation power supply is mainly based on AC power supply and nanosecond power supply, AC power supply provides sinusoidal alternating current, and the direction of the voltage varies periodically with time. The AC-DC power supply adds DC component to the AC power supply, the magnitude of the DC voltage is peak value of the alternating current and the direction is negative, so that the sinusoidal voltage of the AC output moves downward to a peak value, the output voltage of the power supply is in one direction. For the same SDBD plasma actuator, when the peak voltage of the AC power supply is same with the AC-DC power supply and the output frequency is the optimum frequency, then the excitation effect of the two power supplies is comparable. The flow field measurement is carried out by PIV technology. The experiment can find that in a certain range, the excitation effect of AC power supply and AC-DC power supply increases with the increase of voltage. At the same voltage, the excitation effect of AC power supply is better than AC-DC power supply.

Computational study of simultaneous positive and negative streamer propagation in a twin surface dielectric barrier discharge via 2D PIC simulations

“…Throughout the 1990s, SDBDs have been well investigated as potential actuators for gas flow control [1,2,4,6]. For such purposes an asymmetric geometry, where one electrode is offset from the opposite electrode and possibly completely submerged by the dielectric, is typically used [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Much effort has been put into controlling the plasma behaviors, such as densities and surface charge deposition, and their corresponding aerodynamic effects from said SDBD configurations [6,8,[21][22][23].…”

Computational study of simultaneous positive and negative streamer propagation in a twin surface dielectric barrier discharge via 2D PIC simulations

“…For such purposes an asymmetric geometry, where one electrode is offset from the opposite electrode and possibly completely submerged by the dielectric, is typically used [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Much effort has been put into controlling the plasma behaviors, such as densities and surface charge deposition, and their corresponding aerodynamic effects from said SDBD configurations [6,8,[21][22][23].…”

The effect of modulated electric field on characteristic of SDBD‐like plasma jet for surface modification

“…Therefore, the accelerated ions interact with the dominant molecules in the gaseous medium and the momentum transfers to the surrounding gas medium (called the ionic wind), which can be considered the results of the produced plasma jet. [24][25][26][27] In this research, a structure has been used that can use corona wind to strengthen the plasma jet. An Enhanced Plasma jet in this study means increasing the effective impact cross-section of the plasma jet with the surface in surface treatment applications.…”