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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"Dielectric Barrier Discharge"”.
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Optimisation of ozone generation using dielectric barrier discharge
… fundamental kinetics of ozone generation using dielectric barrier discharge and investigating the potential to optimize the process to improve ozone generation efficiency.The kinetics of ozone generation and its limitations are reviewed. The discharge characteristics of single filaments are …
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Pulsed nanosecond dielectric barrier discharge in nitrogen at atmospheric pressure
… In this work, a preliminary study of plasma discharge at atmospheric pressure is conducted as the first step to understand Plasma-Assisted Combustion (PAC) at micro scales.
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CO2 Dissociation using the Versatile Atmospheric Dielectric Barrier Discharge Experiment (VADER)
… can then be recycled or stored chemically.;A Dielectric Barrier discharge (DBD) is a pulsed, low temperature, non-thermal, atmospheric pressure plasma which creates high energy electrons suitable for dissociating CO2 into its components (CO and O) as one step in the CCU process. Here I discuss …
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Atmospheric pressure plasma chemical deposition by using dielectric barrier discharge system
… type and newly designed cylindrical DBD (Dielectric Barrier Discharge) torch have been characterized and compared based on the electrical and optical diagnostics results. The impact of electric field on APCVD (Atmospheric pressure plasma chemical vapor deposition) process was investigated …
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Optimization of surface dielectric barrier discharge ion sources for electroaerodynamic propulsion
Surface dielectric barrier discharges (SDBDs) are a type of asymmetric dielectric barrier discharge (DBD) that can be used to generate ions and produce aerodynamic forces in air. They have been studied for aerodynamic flow control and proposed for small aircraft propulsion as both direct sources of …
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Modeling of a dielectric barrier discharge (DBD) plasma reactor for soil remediation
… a promising plasma technology that uses a Dielectric Barrier Discharge (DBD) reactor to produce highly reactive oxidized species. The present work models plasma inside the DBD reactor and evaluates the production of oxidized species used for pollutant degradation and, eventually, for soil …
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Multi-Physics Model of a Dielectric Barrier Discharge Flow Control Actuator with Experimental Support
… supported multi-physics model of a dielectric barrier discharge boundary layer flow control actuator. The model is independent of empirical data about the specific behavior of the system. This model contributes to the understanding of the specific mechanisms that enable the actuator …
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Flow Control on an Airfoil Under Reversed Flow Conditions Using Nanosecond Dielectric Barrier Discharge Actuators
… into active flow control using Nanosecond Dielectric Barrier Discharge (NS-DBD) plasma actuation to manipulate the behavior of reversed flow over an airfoil. Similar in geometry to the more widely-studied AC-DBD actuators, NS-DBD actuators implement a high-voltage signal consisting of a …
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Improvements on dielectric barrier discharge applications: Plasma photonic crystal tuning by individually controlled filaments and surface DBD water treatment
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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On the use of switched-capacitor multi-level inverters for electro-aerodynamic thrust applications
… converter was designed and tested for use on the dielectric barrier discharge(DBD) section of a decoupled thruster on an electro-aerodynamic(EAD) thrust plane application. The converter was a switched-capacitor multi-level inverter(SCMLI) capable of generating a variety of AC waveform shapes. The …
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Hydration-Induced Plasma Surface Modification of Aluminum Nanoparticles for Power Generation in Oxygen Deficient Environments
… Combining water-vapor with an atmospheric helium dielectric barrier discharge (DBD) plasma yields a thinner Al2O3 shell with double the surface hydration compared to as-received aluminum nanoparticles (nAl). Non-equilibrium combustion studies on plasma-treated nAl particles demonstrate increased …
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Design of Optical Measurements for Plasma Actuators for the Validation of Quiescent and Flow Control Simulations
… is through the use of multi-physics modeling of dielectric barrier discharge actuators. The research in this thesis uses optical measurement techniques to validate computational models of flow control actuators being done concurrently at Virginia Tech. The primary focus of this work is to design, …
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Al/Al2O3 microchannel plasma chemical reactor for ozone synthesis
… of the channel produce spatially-uniform glow discharges in O2 or dry air feedstock gases at a pressures of 1 atmosphere and flow rates of 0.25 – 2.5 standard liters per minute (slm). Several devices and array structures, including Al/Al2O3 or glass channels, also have been fabricated and …
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Microplasma antennas: characterizing capillary plasma discharges as potential monopole antennas
… antenna elements. Glass tubes operated as a dielectric barrier discharge, or DBD, driven by an AC voltage of 10--40 kHz showed peak electron densities of n_e = 10^(15) cm^(-3). Time-averaged electron densities and conductivities in these tubes remained well below n_e = 10^(14) cm^(-3) and σ_p …
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Particle modeling of non-equilibrium field emission driven RF microplasmas
… of the field emission driven microdischarges indicate the absence of the glow regime because field emission replaces secondary emission as the discharge sustaining mechanism. At low pressures, microplasma driven by field ionization and field emission, enabled by nanostructures on …
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Studies on the Conversion of Atmospheric Carbon Dioxide to Methanol
… for plasma-driven splitting of CO₂ through dielectric barrier discharge. In supporting dielectric barrier discharge for non-thermal plasma, Cu-CeOₓ appeared to form oxygen vacancies able to scavenge oxygen after cleavage of the CO₂ molecule, whereas the Cu-ZnO and Cu-ZrOₓ catalysed the …
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Ar-Xe plasma laser and microplasma propagation
… and down Au electrodes facing each other and a dielectric barrier discharge (DBD) structure was deployed for Ar-Xe plasma discharge. Stable plasma discharge was obtained from the device with Ar, Ne, Ar-Xe, He gases at voltages consistently below 1200 V. An intensified charge couple device (ICCD) …
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Nitric oxide reduction by non-thermal plasma and catalysis
… a non-thermal plasma technique in the form of dielectric barrier discharge (DBD) has been extensively investigated for the removal of NOx. The main variables including electrical parameters, chemical compounds and flow conditions are identified and studied in terms of their effects on NO/NOx …
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Simultaneous removal of sulfur dioxide and nitric oxide from gas streams via combined plasma photolysis
The concept of applying Dielectric Barrier Discharge (DBD) and Combined Plasma Photolysis (CPP) to simultaneously remove SO$\sb2$ and NO from simulated flue gas streams has been evaluated with a laboratory-scale reactor. CPP relies on DBD to generate gas phase radicals which oxidize SO$\sb2$ and NO …
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Electrical, Optical and acoustic diagnostics of atmospheric pressure gas discharges
… investigations of atmospheric pressure gaseous discharges, operating in owing helium and helium with low concentrations (0.1 - 1 %) of gas admixtures, together with novel biomedical surface functionalisations. The initial body of this work focuses on comprehensive electrical and optical …
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