Characteristics of pulsed surface arc discharge actuator and its verification of flow control over a Delta wing

Xie, Like; Liang, Hua; Zhao, Guiping; Wei, Biao; Su, Zhi; Yang, Hesen; Hua, Weizhuo

doi:10.1016/j.sna.2019.111550

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…The propagation speed of the pressure wave is maintained at around 350 m/s (see Fig. 7), the value approximately equals to the local sound velocity, the phenomenon is in reasonable agreement with the results in Xie et al 2019). The results indicate that μSDBD, nSDBD, and microsecond surface arc discharge (μSAD) have similar pressure wave structures and propagation speeds.…”

Section: Resultssupporting

confidence: 88%

Flow Separation Control of Nacelle in Crosswind by Microsecond Pulsed Surface Dielectric Barrier Discharge Plasma Actuator

Jia

Liang

et al. 2021

Flow Turbulence Combust

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Flow separation under crosswind conditions seriously jeopardizes the quality of the nacelle's ow eld. In this paper, microsecond pulsed surface dielectric barrier discharge (µSDBD) is used to suppress the ow separation and reduce the crosswind distortion of the nacelle. The ow structure induced by the µSDBD is rst explored by a high-speed schlieren system. The pressure waves composed of a cylindrical wave surrounding the electrodes and a at wave at the top of the cylindrical one can be perceived, which indicates the fast gas heating produced by the µSDBD. A set of wind tunnel tests are then conducted to verify the ability of µSDBD to suppress the nacelle ow separation and study the in uence laws of pulse frequency, coverage area, and the actuator layout on the ow control effects. Results show that plasma actuation can not only improve the total pressure at the exit of the nacelle but also suppress the ow distortion caused by the crosswind. The best ow control effect can be achieved at the pulse frequency of 500Hz, with the value of sectional distortion coe cient reduced by 57.76% compared with the baseline condition. The ow control effect with the plasma actuator covering 120° of the nacelle perimeter is better than that of 60° and 180° coverage, showing the highest ow control e ciency in the 120°c ondition. The µSDBD can improve mixing between the boundary layer and the main ow, enhancing the ability of the boundary layer to resist the adverse pressure gradient, which is bene cial to ow separation control.

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Section: Resultssupporting

confidence: 88%

Flow Separation Control of Nacelle in Crosswind by Microsecond Pulsed Surface Dielectric Barrier Discharge Plasma Actuator

Jia

Liang

et al. 2021

Flow Turbulence Combust

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“…Surface arc actuation can quickly heat the boundary layer [38,42]. According to verified results [43], the wall heating causes the boundary layer to be thick, and local heating makes the transition happen earlier.…”

Section: Discussion Of Control Mechanismsmentioning

confidence: 91%

Experimental study on surface arc plasma actuation-based hypersonic boundary layer transition flow control

Yang¹,

Liang²,

Guo³

et al. 2022

Plasma Sci. Technol.

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Effective control of hypersonic transition is essential. In order to avoid affecting the structural profile of the aircraft, reduce power consumption and electromagnetic interference, the experiment of low-frequency surface arc plasma disturbance to promote hypersonic transition was carried out in the Φ0.25m double-throat Ludwieg tube wind tunnel of Huazhong University of Science and Technology. The contacting PCB sensors and non-contact focused laser differential interferometry testing technology (FLDI) are used in combination. Experimental results show that the low-frequency surface arc plasma actuation has obvious stimulation effects on the second mode unstable wave and can promote boundary layer transition by changing the spectral characteristics of the second mode unstable wave. At the same time, the plasma actuation can promote the energy exchange between the second mode unstable wave and other unstable waves. Finally, the corresponding control mechanism is discussed preliminarily.

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“…Plasma flow control (PFC) is a novel and promising active flow control technology, having the advantages of simple structure, fast response, wide working bandwidth, no mechanical moving parts, etc [1][2][3]. Surface dielectric barrier discharge actuator (SDBDA) [4][5][6], arc discharge plasma actuator (ADPA) [7], plasma synthetic jet actuator (PSJA) [8,9] are the three main actuation methods of PFC. Among them, plasma synthetic jet can generate high-energy jets with speeds up to hundreds of meters per second, and shock waves with approximate speed of sound.…”

Section: Introductionmentioning

confidence: 99%

Parametric study of high-frequency characteristics of plasma synthetic jet actuator

Song¹,

Zong²,

Liang³

et al. 2021

Plasma Sci. Technol.

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A major issue of plasma synthetic jet actuator (PSJA) is the severe performance deterioration at high working frequency. In this study, experiments and numerical simulation are combined together to investigate the influence of thermal conductivity, throat length (L th) and discharge duration (T d) on the high-frequency characteristics of PSJA. Results show that the variation of the actuator thermal conductivity and discharge duration will not alter the saturation frequency of the actuator, whereas decreasing the throat length results in an increase of the saturation frequency. For a short-duration capacitive discharge of 1.7 μs, a clear shock wave is issued from the orifice, followed by a weak jet. As a comparison, when the discharge duration is increased up to 202.6 μs, a strong jet column is formed and no obvious shock wave can be visualized. Based on numerical simulation results, it becomes clear that the long-duration pulse-DC discharge is able to heat the cavity gas to a much higher temperature (3141 K) than capacitive discharge, greatly improving the conversion efficiency of the arc discharge energy to the internal energy of the cavity gas. In addition, high-speed Schlieren imaging is deployed to study the performance degradation mechanism of PSJA at high working frequency. Monitor of the exit jet grayscale indicates that as long as the saturation frequency is exceeded, the actuator becomes unstable due to insufficient refresh time. The higher the discharge frequency, the more frequently the phenomenon of ‘misfires’ will occur, which explains well the decaying jet total pressure at above saturation frequency.

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Characteristics of pulsed surface arc discharge actuator and its verification of flow control over a Delta wing

Cited by 8 publications

References 17 publications

Flow Separation Control of Nacelle in Crosswind by Microsecond Pulsed Surface Dielectric Barrier Discharge Plasma Actuator

Flow Separation Control of Nacelle in Crosswind by Microsecond Pulsed Surface Dielectric Barrier Discharge Plasma Actuator

Experimental study on surface arc plasma actuation-based hypersonic boundary layer transition flow control

Parametric study of high-frequency characteristics of plasma synthetic jet actuator

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