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3 edition of A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma found in the catalog.

A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma

A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma

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  • 28 Currently reading

Published by National Aeronautics and Space Administration, Lyndon B. Johnson Space Center, National Technical Information Service, distributor in Houston, Texas, [Springfield, Va .
Written in English

    Subjects:
  • Hydrogen.,
  • Plasma chemistry.,
  • Structural engineering.

  • Edition Notes

    StatementCarl D. Scott.
    SeriesNASA technical memorandum -- 104765., NASA technical memorandum -- 104765.
    ContributionsLyndon B. Johnson Space Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14691169M

    Matveyev, A.A.; Silakov, V.P. Theoretical study of the role of ultraviolet radiation of the non-equilibrium plasma in the dynamics of the microwave discharge in molecular nitrogen. Plasma Sources Sci. Technol. , 8, – [Google Scholar] Brunet, H.; Roca Serra, J. Model for a glow discharge in flowing nitrogen. J. : Ezequiel Cejas, Beatriz Rosa Mancinelli, Leandro Prevosto. Electron/ion energy loss to discharge walls revised: A case study in low-temperature, thermally nonequilibrium plasmas Y. P. Ren,1 K. Ostrikov,2,a and S. Xu3,b 1Plasma Sources and Applications Center, NIE, Nanyang Technological University, 1 Nanyang Walk, Singapore. To mitigate greenhouse gas CO2 emissions and recycle its carbon source, one possible approach would be to separate CO2 from the flue gases of power plants and to convert it to a liquid fuel, e.g., methanol. Hydrogenation of CO2 to methanol is investigated in a dielectric-barrier discharge (DBD) with and without the presence of a catalyst. nonequilibrium plasma wind tunnel, which produces a highly nonequilibrium plasma flow with the low gas kinetic temperature at M=2, is used. Supersonic flow is maintained at complete steady state. The flow is ionized by a high-pressure aerodynamically stabilized DC discharge in the tunnel plenum and by a transverse RF discharge in.


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A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma Download PDF EPUB FB2

Get this from a library. A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma. [Carl D Scott; Lyndon B.

Johnson Space Center.]. Nonequilibrium discharges in air and nitrogen plasmas at atmospheric pressure Article (PDF Available) in Pure and Applied Chemistry 74(3) January with Reads How we measure 'reads'.

4 1 An Introduction to Nonequilibrium Plasmas at Atmospheric Pressure An essential feature of a cold nonthermal discharge is its short duration. There-fore, the largely varying timescales of the processes inside the discharge must be considered.

The excitation. A one-dimensional simulation for studying the influence of small additives of nitrogen to the parameters and structure of non-uniform microwave discharge in hydrogen at pressure of 1 Torr has been.

Abstract. The structure of an electrode microwave discharge in nitrogen at a pressure of 1 torr and incident power of up to W is studied by the optical and probe methods, when the size of the plasma formation is much less than the size of the discharge by: 3.

The work deals with the modelling of a nonequilibrium spherical microwave discharge. An effect of the higher modes of the incident electromagnetic wav Cited by: 1.

Carl D. Scott has written: 'A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma' -- subject(s): Plasma chemistry, Hydrogen, Structural engineering Asked in. The Nonequilibrium Gas and Plasma Dynamics Laboratory (NGPD) at the Aerospace Engineering Department of the University of Michigan is headed by Professor Iain Boyd and performs research of nonequilibrium gases and plasmas involving the development of physical models for various gas systems of interest, numerical algorithms on the latest supercomputers, and the application of challenging flows.

Plasma plays an important role in a wide variety of industrial processes, including material processing, environmental control, electronic chip manufacturing, light sources, and green energy, not to mention fuel conversion and hydrogen production, biomedicine, flow control, catalysis, and space prop.

A pulse-modulated nonequilibrium atmospheric-pressure microwave argon surface wave plasma is generated by means of a preionization discharge with a single-electrode plasma jet driven by a power supply of 50 by: Nonequilibrium Effect of Atmospheric-Pressure Microwave-Discharge Plasma on Methane and Kerosene Conversion into Synthesis Gas and Fridman, A.A., Diagnostika Neravnovesnoi Khimicheski Aktivnoi Plazmy (Diagnostics of Nonequilibrium Chemically Active Plasma), Moscow Institute of Hydrogen Energy and Plasma Technologies Russian Research Cited by: 9.

The model. In order to describe A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma book plasma in an Ar–H 2 rf discharge, the following assumptions are made: The plasma consists of seven species—electron, Ar, Ar +, H 2, H 2 +, H, and H +, and all species follow the Maxwell–Boltzmann distributions; the plasma is in chemical A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma book, i.e., the rates of species production and loss can Cited by: 1.

The Nonequilibrium Gas and Plasma Dynamics Laboratory (NGPDL) at the Aerospace Engineering Department of the University of Michigan is headed by Professor Iain D. Boyd and performs research of nonequilibrium gases and plasmas A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma book the development of physical models for various gas systems of interest, numerical algorithms on the latest supercomputers, and the application of challenging.

IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 39, NO. 1, JANUARY On the Effect of Nonequilibrium Plasma on the Minimum Ignition Energy—Part 1: Discharge Model Albina A.

Tropina, Mruthunjaya Uddi, and Yiguang Ju Abstract—The mathematical model of a repetitive nanosecond pulse discharge at atmospheric-pressure conditions has been by: A capacitively coupled, atmospheric pressure plasma has been developed that A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma book a high concentration of reactive species at a gas temperature below °C.

The concentration of ground-state oxygen atoms produced by the discharge was measured by NO titration, and found to equal vol %, or ± − cm, using vol % O. Chapter 5 presents experimental material gained from studying the peculiarities of molecular excitation spectra from low-pressure gas discharges and describes diagnostics for nonequilibrium chemically active plasma.

In chapter 6 the problems of mathematical modeling of equilibrium plasma in arcs, microwave and optical discharges are by: @article{osti_, title = {Hydrocarbon plasma chemistry in a continuous microwave discharge}, author = {Gorbachev, A M and Muchnikov, A B and Vikharev, A L and Radishchev, D B and Koldanov, V A}, abstractNote = {A study is made of the relation between the kinetic processes involving carbon-containing species and the intensity ratios of different emission lines in synthesizing diamond.

Carl D. Scott has written: 'A nonequilibrium model for a moderate pressure hydrogen microwave discharge plasma' -- subject(s): Plasma chemistry, Hydrogen, Structural engineering Asked in Actors. Instead of direct treatment of only natural gas, plasma activated methane is reacting with liquid fuel.

In this way, methane molecules are directly incorporated onto liquid fuel to achieve liquefaction. Nanosecond-pulsed dielectric barrier discharge and atmospheric pressure glow discharge are used here to ensure no local heating in gas by: 2.

Nijdam, S, van Veldhuizen, E, Bruggeman, P & Ebert, UAn Introduction to Nonequilibrium Plasmas at Atmospheric Pressure. in Plasma Chemistry and Catalysis in Gases and Liquids.

Wiley-VCH, pp. Cited by: Ions can be created in an inductively coupled plasma, which is a plasma source in which the energy is supplied by electrical currents which are produced by electromagnetic induction, that is, by time-varying magnetic fields.

Microwave-induced plasma. Microwave induced plasma ion sources are capable of exciting electrodeless gas discharges to create ions for trace element mass spectrometry.

This work presents a numerical model of hydrogen plasma in a microwave coaxial discharge at low pressure (25– Pa). The model is a mixed two-dimensional (2D)/three-dimensional (3D) model in that it combines three-dimensional geometry for the electromagnetic field and two-dimensional geometry for the transport equations.

diffuse plasma was created by a low-pressure aerodynamically stabilized DC discharge between nozzle and model in the supersonic test section. The experimental data for the low-temperature non-equilibrium plasma influence on the flow pattern around the model were.

Experiments were carried out in different S/C, reaction temperatures, and residence time s with a pressure of MPa. The standard conditions were a mass flow rate of × 10 −6 kg/s, reaction temperature of °C, plasma power, and frequencies of W and kHz, and S/C of 2.

Experimental variations in different conditions are shown in Table 1, where three different mass flow Cited by: 4.

Population densities of excited states of argon atoms are theoretically examined for ionizing argon plasma in a state of nonequilibrium under atmospheric pressure from the viewpoint of elementary processes with collisional radiative model. The dependence of excited state populations on the electron and gas temperatures is discussed.

Two electron density regimes are found, which are Cited by: Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF.

Visit to get more information about this book, to buy it in print, or to download it as a free PDF. premixed ethylene‐air and H2‐air flows excited by RNSPD and compared with kinetic model‐ ing.

The results show that ignition in a uniform plasma occurs in a large volume, due to gen‐ eration of radical species in the discharge. The main advantage of using RNSPD for high‐. Book Description. Plasma plays an important role in a wide variety of industrial processes, including material processing, environmental control, electronic chip manufacturing, light sources, and green energy, not to mention fuel conversion and hydrogen production, biomedicine, flow control, catalysis, and space propulsion.

Generators of non-thermal atmospheric pressure plasma, such as: gliding arc [], GA gliding arc in tornado GAT [4,5], arc in the transverse blowing gas flow (transverse arc TA) [] and discharge in the gas channel with liquid walls DGCLW [9] can ensure simultaneously high plasma density and operating pressure with high level of non-equilibrium.

Plasma Science and Technology, Vol, No.1, Feb. Comparison of Sterilizing Effect of Nonequilibrium Atmospheric-Pressure He/O 2 and Ar/O 2 Plasma Jets LI Shouzhe ()1,LIMJinpyo()2 1State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics & Optoelectronic Engineering, Dalian University of Technology.

c) Nonequilibrium: The region immediately downstream of the bow shock wave is undergoing dissociation and ionization. A finite time is required for the ionization equilibrium is reached.

In the nonequilibrium region prior to reaching equilibrium, electron density will be low or nonexistent. This nonequilibrium region will emit radiation smaller. Due to the attraction of plasma technologies as a clean and efficient means of surface modification, significant research has gone into the physical and chemical aspects of polymer functionalization.

In this study, it was shown that the use of an atmospheric plasma jet can efficiently modify the surface of polyethylene terephthalate samples and change their hydrophobic properties to Cited by: 2. A thermal model for the nozzle is also included.

The combined features of thermal nonequilibrium, chemical nonequilibrium, and propellant flexibility distinguish this model from previous research efforts.

Model calculations are presented for kW-class arcjets operating with Cited by: 7. The effect of O 2 additions below % to N 2 was investigated for the cleaning of organic contaminants on an indium tin oxide film using a nonequilibrium atmospheric-pressure pulsed plasma.

A remarkably high cleaning efficiency was obtained for plasma treatment with additions from to % O 2 to N concentration of the ground state oxygen radical [O(3 P)] was measured using vacuum Cited by: Coupled plasma and gas flow phenomena are encoun-tered in a number of applications requiring the development of an integrated plasma model coupled to a gas dynamic flow model In the MPT, the microdischarge plasma is in a highly nonequilibrium state with disparate electron and gas temperatures and nonequilibrium finite-rate chemical effects.

A study of streamer discharge properties in the context of their applications in: large-gap arc breakdown, and plasma reforming of carbon-dioxide is presented. The first part of this work focused on the characterization and optimization of volume streamers for reforming applications in carbon : Michael Vincent Pachuilo.

This laboratory, centered in the Department of Mechanical Engineering at The Ohio State University, is led by Igor Adamovich and J. William has developed into a major center for experimental and theoretical research into fluids with substantial thermal mode and/or chemical disequilibrium, with an emphasis on aerospace and industrial applications, such as high-speed flow control, plasma.

An essential tool for understanding this dynamic field, Plasma Physics and Engineering provides a clear, fundamental introduction to virtually all aspects of modern plasma science and technology, including plasma chemistry and engineering, combustion, chemical physics, lasers, electronics, methods of material treatment, fuel conversion, and.

The main LTP devices used in plasma medicine research are the dielectric barrier discharge (DBD) and nonequilibrium atmospheric pressure plasma jets (N-APPJ). In fact, the DBD was the device used in the first experiments on the inactivation of bacteria.

The DBD uses plate electrodes covered by a Cited by: Part I: Fundamentals of Plasma Physics and Plasma ChemistryPlasma in Nature, nonequilibrium velocity conductivity emission particle electromagnetic equilibrium reactions beam You can write a book review and share your experiences.

Other readers will always be interested in your opinion of the. Plasma Physics And Engineering è un libro di Pdf Alexander, Fridman Alexander, Kennedy Lawrence A., Kennedy Lawrence A.

edito da Crc Press a febbraio - EAN puoi acquistarlo sul sitola grande libreria online.High-Pressure, Vibrationally Nonequilibrium Plasmas (Sponsored by National Science Foundation and the Air Force Office of Scientific Research) In this project, we discovered a novel, energy efficient method of storing energy in the vibrational modes of diatomic molecules at high pressures, using resonance absorption of CO laser radiation.butions to the ebook index of the species constituting a ebook cesium plasma, The data are computed for a nonequilibrium plasma since this is the state in which the thermionic converter operates.

The wavelengths chosen for the computations are those of the widely used helium-neon laser, and 3, pm, 11 SYMBOLS 8.