排序方式: 共有29条查询结果,搜索用时 15 毫秒
1.
Artem’ev K. V. Batanov G. M. Berezhetskaya N. K. Borzosekov V. D. Gritsinin S. I. Davydov A. M. Kolik L. V. Konchekov E. M. Kossyi I. A. Lebedev Yu. A. Moryakov I. V. Petrov A. E. Sarksyan K. A. Stepakhin V. D. Kharchev N. K. Shakhatov V. A. 《Plasma Physics Reports》2020,46(3):311-319
Plasma Physics Reports - A subthreshold discharge excited by a microwave beam in air at pressures close to atmospheric is studied as a plasmachemical method of nitrogen oxide (NOx) production. It... 相似文献
2.
N. K. Berezhetskaya S. I. Gritsinin V. A. Kop’ev I. A. Kossyi D. van Wie 《Plasma Physics Reports》2005,31(10):886-890
The generation of long-lived microplasmoids is observed during the irradiation of a metal-dielectric surface with a high-power microwave beam in a chemically active gas mixture (H2 + O2; CH4 + O2). The lifetime of these plasmoids substantially exceeds the characteristic recombination and cooling times of plasmoids arising at the target surface in a chemically inactive medium. 相似文献
3.
S. I. Gritsinin V. Yu. Knyazev I. A. Kossyi N. I. Malykh M. A. Misakyan 《Plasma Physics Reports》2004,30(3):255-262
Results are presented from experimental studies of the formation dynamics, spatial structure, and parameters of a pulse-periodic microwave discharge excited in a coaxial waveguide. The experimental setup allows the stable generation of a plasma jet in molecular and atomic gas flows at pressures close to atmospheric pressure without applying additional initiators. The complicated sequence of processes leading to torch formation cannot be adequately described with conventional models of a discharge sustained by a surface electromagnetic wave. 相似文献
4.
Results are presented from experimental studies of the destruction of chlorofluorocarbon (CF2Cl2) molecules in a methane-oxygen (air) gas mixture whose combustion is initiated by a high-current slipping surface discharge. It is found that a three-component CH4+O2(air)+CF2Cl2 gas mixture (even with a considerable amount of the third component) demonstrates properties of explosive combustion involving chain reactions that are typical of two-component CH4+O2 mixtures. Experiments show the high degree of destruction (almost complete decomposition) of chlorofluorocarbons contained in the mixture during one combustion event. The combustion dynamics is studied. It is shown that the combustion initiated by a slipping surface discharge has a number of characteristic features that make it impossible to identify the combustion dynamics with the formation of a combustion or detonation wave. The features of the effects observed can be related to intense UV radiation produced by a pulsed high-current surface discharge. 相似文献
5.
S. I. Gritsinin P. A. Gushchin A. M. Davydov E. V. Ivanov I. A. Kossyi M. A. Misakyan 《Plasma Physics Reports》2009,35(11):933-940
A microwave coaxial plasmatron (microwave torch) is used as a plasmachemical converter of methane into hydrogen and hydrocarbons.
The measured energy cost of methane decomposition is close to its minimum theoretical value. Such a low energy cost is unsurpassed
for reactors operating at atmospheric pressure. A model of the plasmachemical converter is constructed. The results of calculations
in the frame-work of this model agree well with experimental data. 相似文献
6.
N. K. Berezhetskaya S. I. Gritsinin V. A. Kop’ev I. A. Kossyi P. S. Kuleshov N. A. Popov A. M. Starik N. M. Tarasova 《Plasma Physics Reports》2009,35(6):471-483
Results are presented from experimental studies and numerical calculations of the ignition of a stoichiometric CH4: O2 gas mixture by a high-current gliding discharge. It is shown that this type of discharge generates an axially propagating thermal wave (precursor) that penetrates into the gas medium and leads to fast gas heating. This process is followed by an almost simultaneous ignition of the gas mixture over the entire reactor volume. 相似文献
7.
S. Yu. Kazantsev I. G. Kononov I. A. Kossyi N. M. Tarasova K. N. Firsov 《Plasma Physics Reports》2009,35(3):251-257
Ignition of a stoichiometric CH4: O2 mixture by a laser spark excited in the reactor volume is studied experimentally. It is found that the spark initiates a feebly radiating incomplete-combustion wave, which is much faster than the combustion wave, but is substantially slower than the detonation wave. With a time delay of 500–700 μs, a bright optical flash occupying the entire chamber volume is observed, which indicates fast (involving branching chain reactions) ignition of the gas mixture. A conclusion is drawn regarding the common nature of the process of ignition of a combustible gas mixture by a laser spark excited in the reactor volume and the previously investigated initiation of combustion by laser sparks excited at solid targets, high-power microwave discharges, and high-current gliding discharges. 相似文献
8.
A Subthreshold High-Pressure Discharge Excited by a Microwave Beam: Physical Basics and Applications
K. V. Artem’ev G. M. Batanov N. K. Berezhetskaya A. M. Davydov I. A. Kossyi V. I. Nefedov K. A. Sarksyan N. K. Kharchev 《Plasma Physics Reports》2018,44(6):615-625
A new form of discharge excited by a microwave beam in a high-pressure (up to atmospheric and higher) gas in free space and in a closed chamber is discussed. For the first time, the discharge was implemented by means of a gyrotron with a pulse power of 200 ≤ P ≤ 600 kW, a pulse duration of 0.5 ≤ τ ≤ 20 ms, and a wavelength of λ = 0.4 cm. Under deeply subthreshold conditions in atmospheric-pressure air, a plasma column with a length of L = 50 cm was generated by a microwave beam formed with the help of a quasi-optical transmission line. With the use of the MIG-3 gyrotron complex with the above parameters, generation of a plasma column with a length of several meters is possible in principle. The parameters and structure of the formation of the plasma investigated make it possible to class it as a self-non-self-sustained (SNSS) discharge, discovered and described for the first time at the Prokhorov General Physics Institute, Russian Academy of Sciences. One of the important applications of this type of discharge is plasmachemical cleaning of the urban air environment of hazardous contaminants. 相似文献
9.
Artem’ev K. V. Batanov G. M. Davydov A. M. Berezhetskaya N. K. Borzosekov V. D. Kolik L. V. Konchekov E. M. Kossyi I. A. Petrov A. E. Sarksyan K. A. Stepakhin V. D. Kharchev N. K. 《Plasma Physics Reports》2021,47(5):498-502
Plasma Physics Reports - An analysis of a set of experiments on studying subthreshold microwave self/non-self-sustained (SNSS) discharges made it possible to estimate the volume of the active zone... 相似文献
10.
Edvard Mikhailovich Barkhudarov Nick Christofi Igor Antonovich Kossyi Mamikon Aramovich Misakyan John Sharp Ivan Merabovich Taktakishvili 《World journal of microbiology & biotechnology》2008,24(6):761-769
The killing of bacteria on surfaces by two types of UV sources generated by microwave radiation is described. In both cases,
UV radiation is produced by gas-discharge electrodeless lamps (Ar/Hg) excited by microwaves generated by a power supply from
a standard domestic microwave oven. For UV lamp excitation, one of these sources makes use of a coaxial line with a truncated
outer electrode that allows the excitation of gases and gaseous mixtures over a wide range of pressures at a comparatively
low microwave power. In the second source, UV lamps are placed inside a microwave oven. Ultraviolet generated by the two sources
was used to destroy vegetative Escherichia coli bacteria dispersed in thin films and in droplets on surfaces. Two types of UV lamps were used in the study. The first was
constructed of quartz that filtered UV below 200 nm preventing the dissociation of oxygen in air and, hence, ozone production.
The second type of tube was transparent to UV below 200 nm facilitating ozone production in air surrounding it. It was shown
that bacterial cells dispersed in films on surfaces are killed more rapidly than cells present in droplets when using the
lamps producing ozone and UV radiation. The UV sources described can effect rapid killing and constitute a cost-effective
treatment of food and other surfaces, and, the destruction of airborne viruses and bacteria. The lamps can also be utilised
for the rapid eradication of microorganisms in liquids. 相似文献