Experimental Investigation of “Why an AC Dielectric Barrier Discharge Plasma Actuator is Preferred to DC  2 Corona Wind Actuator in Boundary Layer Flow Control?

Tathiri, Gholamreza; Esmaeilzadeh, E.; Mirsajedi, S. M.; Moghaddam, H Mahdavi

doi:10.36884/jafm.7.03.20378

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…Based on a few papers by He et al, [14], Daud et al, [15] and Sekimoto et al, [16], DBD plasma actuator is made of electrodes, a film such as polyimide tape (Kapton) acting as dielectric and has a high voltage power supply. Commonly, alternating current (AC) are likely to be used as a power supply as compared to direct current (DC) with a range in kV and a frequency ranging 50Hz~50kHz [17]. Figure 1 shows the schematic of a singular DBD plasma actuator in a normal scenario.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Investigation of Using DBD Plasma for Application in Micro Combustors

Tan

Munir

Tahir

et al. 2021

ARFMTS

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Dielectric-Barrier-Discharge (DBD) plasma actuators are one of the recent research topics that has caught worldwide attention. Plasma actuators are typically used in the aerospace field of study for their flow control and wide usage of different types of plasma actuators. DBD plasma actuator is an immobile actuator that able to be utilized for its flexibility and light weight parts. Due to the wide usage of DBD plasma, it is also able to be useful in the field of combustion in terms of air flow control. In this research, the DBD plasma actuator is tested on its ability to be applied in micro combustors based on the air flow controlling aspect, the temperature of plasma and effects of vibration of plasma. Experiments were performed in the wind tunnel with smoke generator to show the flow separation by DBD plasma actuator while infrared camera and accelerometer were used to sense the temperature and vibration respectively to investigate the effects of DBD plasma actuator on these aspects. Results shows that the plasma generated has minimal effects of the flow characteristics whereas the temperature of plasma has a maximum of 90?celcius when it is generated continuously. The vibration results indicate that generating plasma produces a small amount of vibration.

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Section: Introductionmentioning

confidence: 99%

Preliminary Investigation of Using DBD Plasma for Application in Micro Combustors

Tan

Munir

Tahir

et al. 2021

ARFMTS

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Mechanisms of low-frequency dielectric barrier discharge (DBD) plasma driven by unipolar pulses and bipolar pulses

2021

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In this study, experimental results presenting the development of Dielectric Barrier Discharge (DBD) powered by bipolar and unipolar pulses are compared. The experimental results showed that discharge current peaks in the case of DBD driven by repetitive unipolar pulses were about three times lower than those in the case of DBD driven by bipolar pulses. It is well known that if DBD is driven by bipolar pulses, the effect of surface charge on dielectric layers from the preceding discharge helps to ignite consecutive discharges at the same locations where the previous discharges already struck. In contrast, in the case of DBD generated by using the low-frequency unipolar pulses, the consecutive DBDs just could be initiated after the system erases part of the prehistory effect of surface charge deposition on dielectric layers from the preceding discharge, and then the following discharge was ignited at erased or uncharged areas. It was critical that a part of the energy stored in the dielectric layer and discharge gap by the previous discharge needed to be released to develop the next discharge. The results of this study provided an outlook for estimating the effectiveness of the DBD plasma system used in specific applications such as DBD for flow actuators or surface treatment where the use of unipolar DBDs at low frequency may be necessary.

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Experimental Study of Plasma Actuator Effects on Flow Field Separation Bubble around Blunt Flat Plate

Kavousfar¹,

Esmaeilzadeh

Mahdavy-Moghaddam³

et al. 2016

JAFM

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In this paper, the air flow around a blunt flat plate with a rounded leading edge has been experimentally examined with and without the presence of a plasma actuator. Tests have been conducted with Reynolds numbers ranging from 10 4 to 10 5 . Significant phenomena in this flow field is the flow separation at the leading edge of the body, which called separation bubble. There are two considerably dimensionless parameters in this experiment. One of them is the leading edge radius ratio to body thickness and other one is the ratio of maximum velocity induced by plasma actuator to free stream velocity. Geometries with the values of R/D=0, 1/16, 2/16, 4/16 were tested. For each geometry, the effectiveness of plasma actuator on the separation bubble is studied in different values of velocity ratio. The results show that, the effect of plasma actuator for the geometry with sharp edge (R/D=0), is negligible, while in geometry with rounded edge, the plasma actuator has significant effect on the separation bubble domain. This effectiveness is enhanced, by increasing of leading edge radius and velocity ratio, so that in rounded edge geometry (R/D=4/16) length of separation bubble is reduced about 75%.

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Experimental Investigation of “Why an AC Dielectric Barrier Discharge Plasma Actuator is Preferred to DC 2 Corona Wind Actuator in Boundary Layer Flow Control?

Cited by 5 publications

References 38 publications

Preliminary Investigation of Using DBD Plasma for Application in Micro Combustors

Preliminary Investigation of Using DBD Plasma for Application in Micro Combustors

Mechanisms of low-frequency dielectric barrier discharge (DBD) plasma driven by unipolar pulses and bipolar pulses

Experimental Study of Plasma Actuator Effects on Flow Field Separation Bubble around Blunt Flat Plate

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