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Plasma Science, IEEE Transactions on

Issue 12  Part 1 • Date Dec. 2009

 This issue contains several parts.Go to:  Part 2 

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Displaying Results 1 - 12 of 12
  • Table of contents

    Publication Year: 2009 , Page(s): C1
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  • IEEE Transactions on Plasma Science publication information

    Publication Year: 2009 , Page(s): C2
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  • Special Issue on Plasma-Assisted Combustion

    Publication Year: 2009 , Page(s): 2273 - 2274
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  • Compact Pulsed-Power System for Transient Plasma Ignition

    Publication Year: 2009 , Page(s): 2275 - 2279
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (472 KB) |  | HTML iconHTML  

    The use of a compact solid-state pulse generator and compact igniters for transient plasma ignition in a pulse detonation engine (PDE) is reported and compared with previous results using a pseudospark pulse generator and threaded rod electrode. Transient plasma is attractive as a technology for the ignition of PDEs and other engine applications because it results in reductions in ignition delay and has been shown to ignite leaner mixtures which allows for lower specific fuel consumption, high-repetition rates, high-altitude operation, and reduced NOx emissions. It has been applied effectively to the ignition of PDEs as well as internal combustion engines. Nonequilibrium transient plasma discharges are produced by applying high-voltage nanosecond pulses that generate streamers, which generate radicals and other electronically excited species over a volume. The pulse generator used is in this experiment is capable of delivering 180 mJ into a 200-?? load, in the form of a 60-kV 12-ns pulse. Combined with transient plasma igniters comparable with traditional spark plugs, the system was successfully tested in a PDE, resulting in similar ignition delays to those previously reported while using a smaller electrode geometry and delivering an order of magnitude less energy. View full abstract»

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  • Air–Propane Mixture Ionization Processes in Gas Discharges

    Publication Year: 2009 , Page(s): 2280 - 2285
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (307 KB) |  | HTML iconHTML  

    Investigations devoted to the analysis of effective ionization processes at early discharge stages in propane-air mixture, at propane concentration of <10% at atmospheric pressure, are the first necessary step before the analysis of air-propane discharge in real conditions. Necessary parameters of excitation and ionization in these mixtures have been determined in a wide range of electric field. Thresholds of ionization in these mixtures have been calculated. View full abstract»

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  • Comparative Analysis of Engine Ignition Systems

    Publication Year: 2009 , Page(s): 2286 - 2292
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (919 KB) |  | HTML iconHTML  

    The experimental data of a comparative analysis of a spark-ignition system and a nanosecond-discharge-based ignition system in engines are presented. The effectiveness of the ignition systems used was evaluated on fuel consumption and exhaust-gas composition during the road and laboratory tests. It has been discovered that using a plasma-ignition system rather than a spark-ignition system considerably improves engine performance and reduces tailpipe emissions at the same time. The obtained results are analyzed based on the equilibrium calculations of combustion products and on the analytical evaluation of the flame-extinguishing-layer width near the cylinder walls of the combustion chamber. View full abstract»

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  • Investigations of Subcritical Streamer Microwave Discharge in Reverse-Vortex Combustion Chamber

    Publication Year: 2009 , Page(s): 2293 - 2297
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (591 KB) |  | HTML iconHTML  

    In this paper, we report on the experimental investigations of two innovative technologies combined in one device, namely, the application of an initiated streamer microwave (MW) discharge for ignition and flame control in a reverse-vortex combustion chamber, also known as a Tornado combustor. The pulsed subcritical streamer MW discharge (SSD) in a quasi-optical wave beam was experimentally investigated in the atmospheric-pressure model of a Tornado combustor with transparent dielectric walls. The possibility of a surface MW streamer discharge formation at new conditions, particularly on the dielectric walls of the cylindrical combustion chamber, has been confirmed. The mechanism of SSD realization, at which the discharge development takes place in a volume of the combustion chamber, has been proposed. It was shown that SSD could be applied for ignition of fuel/air mixtures in an axial area of the reverse-vortex combustion-chamber bottom plate, which is normally used for a fuel feeding. View full abstract»

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  • Nonself-Sustained Microwave Discharge in a System for Hydrocarbon Decomposition and Generation of Carbon Nanotubes

    Publication Year: 2009 , Page(s): 2298 - 2302
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (513 KB) |  | HTML iconHTML  

    This paper deals with the investigation of a method for sustainment of high-power microwave discharge in the installation for natural-gas decomposition. The essence of the method is to provide a generation of auxiliary discharge plasma in the area where the main microwave plasma torch burns. The design of the electrode system of auxiliary discharge resembles that for a coaxial plasmatron that consumes an average current of about 0.1 A. Then, the nonself-sustained microwave discharge with a frequency of 2.45 GHz has been obtained at a power level from 1 to 3 kW. Such a discharge has been used in the installation for natural-gas decomposition and generation of the carbon nanotubes. With a typical gas flow of 1 m3/h, the natural-gas conversion achieves 40%-80%. Three types of nanotubes are contained in the final product: multilayer tubes, single-layer tubes, and onion-type tubes. View full abstract»

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  • Nitric Oxide Formation in a Premixed Flame With High-Level Plasma Energy Coupling

    Publication Year: 2009 , Page(s): 2303 - 2313
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (809 KB) |  | HTML iconHTML  

    This paper presents quantitative planar laser-induced fluorescence (PLIF) imaging of nitric oxide (NO) in a transient-arc direct-current plasmatron igniter using premixed air/fuel mixtures. Quantitative measurements of NO are reported as a function of gas flow rate (20-50 standard cubic feet per hour), plasma power (100-900 mA, 150-750 W), and equivalence ratio (0.7-1.3). Images were corrected for temperature effects by using 2-D temperature field measurements obtained with infrared thermometry and calibrated by a more accurate multiline fitting technique. The signals were then quantified using an NO addition method and spectroscopic laser-induced fluorescence modeling of NO. NO PLIF images and single-point NO concentrations are presented for both plasma-discharge-only and methane/air plasma-enhanced combustion cases. NO formation occurs predominantly through N2(v) + O ¿ NO + N for the plasma-discharge-only case without combustion. The NO concentration for the plasma-enhanced combustion case (500-3500 ppm) was an order of magnitude less than the plasma-discharge-only case (8000-15 000 ppm) due to the reduction of plasma reactions by the methane. Experiments show the linear decay of NO from equivalence ratio 0.8-1.2 under the same flow condition and discharge current. View full abstract»

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  • Plasma-Assisted Combustion System Based on Nonsteady-State Gas-Discharge Plasma Torch

    Publication Year: 2009 , Page(s): 2314 - 2320
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (578 KB) |  | HTML iconHTML  

    This paper describes the experiments with the plasma-assisted combustion system as applied to gaseous hydrocarbons. The system is based on a nonsteady-state gas-discharge plasmatron with a low average current. One of the subjects of the investigations is to elucidate a correlation between the discharge burning regimes in the plasmatron and the properties of the torch flame in the combustion chamber. Depending on the gas-discharge regimes and plasmatron design, the conditions of complete hydrocarbon combustion and partial oxidation have been demonstrated. Aside from that, the data on testing a special power supply intentionally developed for nonsteady discharge powering are presented. View full abstract»

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  • IEEE Transactions on Plasma Science information for authors

    Publication Year: 2009 , Page(s): C3
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  • Affiliate Plan of the IEEE Nuclear and Plasma Sciences Society

    Publication Year: 2009 , Page(s): C4
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IEEE Transactions on Plasma Sciences focuses on plasma science and engineering, including: magnetofluid dynamics and thermionics; plasma dynamics; gaseous electronics and arc technology.

 

 

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