Hydrodynamic study of a microwave plasma torch

Gadonna, K.; Leroy, O.; Silva, Tiago; Leprince, P.; Boisse‐Laporte, C.; Alves, L. L.

doi:10.1051/epjap/2011110161

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…Few authors have complemented electromagnetic field simulations with a gas dynamics model for a single gas [12,13]. As far as self-consistent modelling of comparable discharges is concerned, there have been very advanced works focusing on Plasma Sources Science and Technology…”

Section: Introductionmentioning

confidence: 99%

On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H₂microwave plasma torch

Synek¹,

Obrusník²,

Hübner³

et al. 2015

Plasma Sources Sci. Technol.

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A complementary simulation and experimental study of an atmospheric pressure microwave torch operating in pure argon or argon/hydrogen mixtures is presented. The modelling part describes a numerical model coupling the gas dynamics and mixing to the electromagnetic field simulations. Since the numerical model is not fully self-consistent and requires the electron density as an input, quite extensive spatially resolved Stark broadening measurements were performed for various gas compositions and input powers. In addition, the experimental part includes Rayleigh scattering measurements, which are used for the validation of the model. The paper comments on the changes in the gas temperature and hydrogen dissociation with the gas composition and input power, showing in particular that the dependence on the gas composition is relatively strong and non-monotonic. In addition, the work provides interesting insight into the plasma sustainment mechanism by showing that the power absorption profile in the plasma has two distinct maxima: one at the nozzle tip and one further upstream.

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Section: Introductionmentioning

confidence: 99%

On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H₂microwave plasma torch

Synek¹,

Obrusník²,

Hübner³

et al. 2015

Plasma Sources Sci. Technol.

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“…Increasing the power supplied to the discharge leads to larger T gas , more noticeable towards the end of the dart and in the plume region. In [31,48], feeding the discharge with the same argon flow, Alves et al obtained similar gas temperature profiles in a TIA torch. However, a sharper increase in gas temperature in the first millimeters from the nozzle was reported.…”

Section: Gas Temperature and Electron Density: Different Zones Along ...mentioning

confidence: 88%

Experimental characterization of TIAGO torch discharges: surface wave discharge behavior and (post-)discharge kinetics

Morales-Calero

Rincón

Muñoz

et al. 2023

Plasma Sources Sci. Technol.

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The Torche à Injection Axial sur Guide d’Ondes source -better-known as TIAGO torch- is a particular type of Microwave Induced Plasma which has become in the technological and scientific spotlight due to its outstanding features. Moreover, TIAGO torch device arouses interest thanks to its remarkable performance in many challenging topics as green energy generation or graphene production by hydrocarbons decomposition. Although it has not been experimentally demonstrated up to date, discharges generated by a TIAGO torch have been theoretically predicted to be Surface Wave Discharges, a kind of plasmas leading the development of new materials. Therefore, a deeper and fundamental research of this device is needed to optimize the implementation of plasma technology to these fields. In this study, the axial distribution of gas temperature, electron density and intensity of main atomic and molecular emissions have been studied by Optical Emission Spectroscopy feeding the discharge with different input power values (200, 400 and 600 W). A complete axial characterization of both the dart and the plume regions is depicted and, according to the data obtained for the main plasma parameters, different regions can be identified, being the radiation zone reported for the first time at atmospheric pressure. The kinetics of both the dart and the plume are discussed and an experimental verification of the TIAGO torch behavior as a surface wave discharge is presented for first time.

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“…We remind here the main effects of the plasma parameters on the HD behavior of the gas/plasma system, which have been presented previously [23]. As shown in Figure 7, the gas temperature is sensitive to changes in the electron density: T g increases with n e , because the power transfer from the plasma to the gas is mainly due to electron-neutral collisions, thus becoming more effective at high energy-density exchange rates (see last term of Equation (ix) in the Appendix, depending on the n e T e ν product).…”

Section: Influence Of Plasma Parametersmentioning

confidence: 95%

Study of Gas Heating by a Microwave Plasma Torch

Gadonna¹,

Leroy²,

Leprince³

et al. 2012

JMP

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Among the different types of microwave plasma torches, the axial injection torch (TIA) has been used for several years to create chemically active species, in applications such as gas analysis, surface processing and gaseous waste treatments. The TIA allows the coupling of microwave energy (2.45 GHz) to a gas injected axially at the nozzle's exit. The TIA produces non-local thermodynamic equilibrium plasmas with a high luminosity and a maximum density of charged particles at the nozzle's exit. The present work is dedicated to study the plasma created by a TIA running at atmospheric pressure. The study involves both experiment and modeling of this torch, in order to maximize the coupling between the microwave power and the plasma and to define the optimum plasma and flow operating conditions for plasma-to-gas heat transfer.

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Hydrodynamic study of a microwave plasma torch

Cited by 8 publications

References 9 publications

On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H₂microwave plasma torch

On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H₂microwave plasma torch

Experimental characterization of TIAGO torch discharges: surface wave discharge behavior and (post-)discharge kinetics

Study of Gas Heating by a Microwave Plasma Torch

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Hydrodynamic study of a microwave plasma torch

Cited by 8 publications

References 9 publications

On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H2microwave plasma torch

On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H2microwave plasma torch

Experimental characterization of TIAGO torch discharges: surface wave discharge behavior and (post-)discharge kinetics

Study of Gas Heating by a Microwave Plasma Torch

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On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H₂microwave plasma torch

On the interplay of gas dynamics and the electromagnetic field in an atmospheric Ar/H₂microwave plasma torch