Recent Progress in Dielectric Barrier Discharges for Aerodynamic Flow Control

Font, Gabriel; Morgan, W. L.

doi:10.1002/ctpp.200710015

Cited by 25 publications

(14 citation statements)

References 18 publications

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“…A peculiarity of DBDs is the presence of a dielectric insulator on one or both metallic electrodes, which engenders formation of numerous filamentary microdischarges of nanosecond duration, with sizes around 10–100 µm. Although the DBD has been used historically in the ozone industry since its initial discovery in 1857,1 it is now recognized as a viable processing plasma in various applications such as waste gas cleaning, excimer light sources,1 chemical synthesis,1 aerodynamic actuators,2–4 and biomedical sterilization 5–7. In the late 1980s, Okazaki and co‐workers developed an atmospheric pressure diffuse barrier discharge, which they designated as atmospheric pressure glow discharge (APG), which provided spatially uniform transient non‐equilibrium plasma at atmospheric pressure 8–11…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Synthesis in Atmospheric Pressure Glow Discharge: A Review

Nozaki

Okazaki

2008

Plasma Processes & Polymers

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This review presents recent developments of formation techniques related to atmospheric pressure glow discharge. The description specifically emphasizes their application to carbon nanotube (CNT) synthesis based on our recent work. High‐purity vertically aligned single‐walled CNTs are producible only when an atmospheric pressure glow discharge is applied: even moderate pressure such as 20 kPa preferentially synthesizes multi‐walled CNTs. Lower operating pressures are known to produce carbon nanofibers exclusively. A tentative reaction mechanism is discussed based on plasma‐induced substrate heating and on‐line gas analysis in the plasma sheath. Finally, concluding and prospective remarks are presented briefly.

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Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Synthesis in Atmospheric Pressure Glow Discharge: A Review

Nozaki

Okazaki

2008

Plasma Processes & Polymers

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“…Plasma flow control is a type of active flow control technology based on discharge plasma technologies, which is advantageous of little power, quick response, and perfect actuation. Russians, Americans, and other research groups [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] have done an in-depth study on plasma flow control, as well as the interaction between plasmas and airflows, to improve the aerodynamic characteristics and promote the scientific basis for efficiency. Discharge plasmas applied to flow control mainly include surface discharges [4][5][6][7][8][9][10][11][12][13][14] and volume discharges [15][16][17][18][19][20].…”

Section: Background For Discharges Under Airflowsmentioning

confidence: 99%

“…Recently, atmospheric pressure discharge plasma has been considered for many applications, such as airflow control [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], material modification [21][22][23][24][25][26][27][28][29][30][31], air purification [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49], and so on. With the difference from low-pressure discharge plasmas, atmospheric pressure dischar...…”

Section: Introductionmentioning

confidence: 99%

Repetitive Nanosecond Volume Discharges under Airflows

Tang¹,

Wei²,

Yu³

2019

Plasma Science and Technology - Basic Fundamentals and Modern Applications

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Atmospheric pressure discharges are widely used in active airflow control, material synthesis, and air treatment. The key to an optimal application performance lies in how to generate stable and diffuse plasma especially in a large volume and in high-speed airflows. This chapter presents the study of repetitive nanosecond volume discharges under high-speed airflows. The volume discharge strongly depends on the airflows, and the corresponding discharge modes vary from filament to diffuse modes with addition of airflows. The role of airflows provides negative effects on discharge currents as well as discharge densities. Moreover, a type of discharge device with upstream and downstream structure is proposed to demonstrate that charged particles produced by the upstream discharge are transported to the downstream zone and play a pre-ionization and enhanced effect to the downstream discharges.

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“…Different models have been proposed to simulate the discharge, which mainly include particle-in-cell (PIC) model [12][13][14][15], Monte Carlo model [16,17], five-moment fluid model [7,18], three-equation drift-diffusion fluid model [4,[6][7][8]10], two-equation drift-diffusion fluid model [19][20][21][22][23][24][25], and some other analytical models according to the fidelity of the physical principles. The PIC and Monte Carlo models based on the principle of particle collisions, typically involve the solution of the Boltzmann equation, which is computation expensive, requiring a long computation time.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Chemical Reactions on the Discharge Characteristics and Energy Balance of a Nanosecond Repetitive Pulsed Dielectric Barrier Discharge

et al. 2019

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Numerical investigation on a nanosecond repetitively pulsed dielectric barrier discharge (NS-DBD) in air is a temporal and spatial multi-scale problem involving a large number of species and chemical reactions. To know the effects of the species and chemical reactions on the discharge characteristics and energy balance, a high voltage repetitive plane to plane NS-DBD is numerically studied. Four groups of species and the corresponding chemical reactions are adopted in the investigation. The most complex one has 31 species and 99 chemical reactions that contains all reaction types, in particular, the vibrational-translational relaxation reactions, whereas the simplest one has only 4 species and 4 reactions, which represents the main kinetic processes. The others are in between. The discharge energy reaches to a periodic phase equality state after the second pulse in the repetitive pulses, and the present analysis is focused on the 7th pulse. All the N 2 /O 2 mixture reaction models predict almost the same discharge energies, which are qualitatively similar with that in the simplified 4-species model. The prediction of the discharge energy is determined by the electronic excitation and the energy gain by ions, but the vibrational excitation, negative ions, associative ionization, dissociation of nitrogen and oxygen molecules have very weak effects. The gas heating is determined by the exothermic reactions and the ions. The main processes in the fast and slow gas heating are the energy release of ions and the exothermic reactions, respectively. The negative ions, vibrational excitation, and associative ionization have very weak effects on the gas heating during the high voltage pulse, but they have considerable effects at a larger time scale. The magnitudes of the fast gas heating efficiency (η GH ) are in the range of 41%∼47% in the N 2 /O 2 mixture reduced kinetic models, but η GH is higher in the 4-reaction model.

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Recent Progress in Dielectric Barrier Discharges for Aerodynamic Flow Control

Cited by 25 publications

References 18 publications

Carbon Nanotube Synthesis in Atmospheric Pressure Glow Discharge: A Review

Carbon Nanotube Synthesis in Atmospheric Pressure Glow Discharge: A Review

Repetitive Nanosecond Volume Discharges under Airflows

Numerical Investigation on the Effects of Chemical Reactions on the Discharge Characteristics and Energy Balance of a Nanosecond Repetitive Pulsed Dielectric Barrier Discharge

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