About
84
Publications
4,835
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
582
Citations
Introduction
Publications
Publications (84)
It has been experimentally shown that by the thermophoretic force acting in the thermal field on microparticles in a complex plasma, , it is possible to effectively control a cloud of charged microparticles, which is formed in an electrostatic trap in the stratum of a positive glow discharge column. It is found that changing the temperature gradien...
A model for calculating the surface tension coefficient of a spherical cloud of charged microparticles in a plasma is proposed. The coefficients of the surface tension of Coulomb spheres obtained in a lowpressure glow discharge in neon at a temperature of 77K for particles with a diameter of 4 μm and a temperature of 295K for particles with a diame...
The contribution from the recombination of radicals on the surface of an admixture microparticle
in a reacting hydrogen/oxygen/argon or propane/oxygen/argon combustible mixture, to the heating of a
microparticle, has been analyzed. An estimation has been made of possible ignition acceleration from a
hotspot in the form of heated microparticle, at t...
A model of the energy balance of a microparticle located in the plasma of an electric discharge in neon is proposed which considers the heating of a microparticle as a result of collisions with electrons and ions, recombination, and quenching of metastable atoms on its surface. Plasma parameters are calculated using a liquid model of a low-pressure...
We consider the efficiency of an ion confinement inside a cloud of charged microparticles in a low-pressure DC discharge. To describe the ion confinement efficiency in such complex plasma, we propose the indicators calculated taking into account the processes responsible for the generation, the losses, and the accumulation of ions in a cloud of cha...
The complex plasma, comprising low-pressure DC discharge plasma and charged micro-particles, represents a trap, which can accumulate and localize ions. On the surface of the micro-particles, a loss of ions and electrons always occurs. These additional losses can lead to a decrease in the ion and electron densities in the plasma bulk. However, in mo...
Herein, we have calculated plasma parameters corresponding to those of a dc discharge in neon at 77 K temperature at self-organization of dense Coulomb balls with a dust particle number density of more than 4 ×1011m−3. To calculate the plasma parameters, we employed the fluid model of the positive column of the glow discharge with dust particles. T...
The parameters of a low-pressure glow discharge in neon with solid microparticles are experimentally and numerically studied in order to determine the region of the existence of charged dust clouds that most strongly affect the electrophysical parameters of a gas-discharge plasma in neon. It is shown that dust clouds with the maximum total negative...
The ion accumulation within the negatively charged dust cloud embedded in a plasma of dc glow discharge has been studied numerically under the conditions corresponding to recent experiments. The characteristics of neon plasma in a positive column of dc discharge with various densities of micron-sized particles have been simulated by a diffusion-dri...
The structure and properties of the shock wave front propagating in binary gas was investigated by multi-channel emission spectroscopy and electrostatic probe located in a flow core. The experimental conditions allowed to consider the energy exchange processes in the front like interaction of isolated cold heavy molecules Mo(CO)6 with shock wave fr...
Numerical study of the effect of dust particle concentration on the thermophoretic force acting on a dust particle inside a dust structure in plasma has been carried out. The experimental data on the formation of voids in dust structures formed by 2.55 μm dust particles in a glow dc discharge in neon have been used. The simulation has been performe...
Dense dust structures have been observed in a glow DC discharge in neon at a temperature of 77 K. Dependencies of shape, axial and radial sizes of dust structures on discharge current, gas pressure and longitudinal electric field have been studied. At the intersection points of dependencies of radial and axial sizes of dust structures on discharge...
The discharge parameters for the formation of charged spherical dust structures (Coulomb dust spheres) in neon plasma at a discharge tube wall temperature of 77 K are determined. The dust spheres were experimentally observed at fixed neon pressures of 0.15, 0.9, and 1.2 Torr. They were also obtained by extrapolation at pressures of 0.42 and 0.65 To...
The boundary (line) of the transition from homogenous dust structures to hollow dust structures in the coordinates gas pressure–discharge current in a glow discharge in neon was found experimentally. The experiments were carried out with spherical particles 2.55 and 4.14 μm in diameter. The transition was simulated
using the diffusion–drift model o...
![Figure 4. The OH* chemiluminescence intensity profiles [1] for a 2 vol...](publication/330474222/figure/fig2/AS:716432803381254@1547822299189/The-OH-chemiluminescence-intensity-profiles-1-for-a-2-vol-C-3-H-8-10-vol-O-2Ar_Q320.jpg)
The autoignition of a stoichiometric propane–oxygen mixture diluted with argon was studied behind reflected shock waves in the temperature range of 1230–1700 K at the total concentration of [M]50 ~ 10⁻⁵ mol/cm³. Emission signals from electronically excited CH* (at λ = 429 nm) and C2* (at λ = 516 nm) radicals were recorded. It was found that the CH*...
Experimental investigations and detailed kinetic simulations of the formation of soot particles during pyrolysis of mixtures of acetylene with acetone and propane behind reflected shock waves are performed. Acetone and propane additives are found to substantially promote the process of soot formation as compared with that in acetylene–argon mixture...
The plasma parameters leading to the formation of spherical dust structures (coulomb dust spheres) in neon plasma have been experimentally determined at a temperature of the discharge device wall 77 K. The dust spheres were observed experimentally at pressures of 0.15, 0.9 and 1.2 Torr and were obtained by interpolation at pressures of 0.42 and 0.6...
The transformation of dust structures under changes of discharge current in neon dc
discharge at a pressure of 20 Pa and the discharge tube temperature of 77 K has been studied. A nonmonotonic dependence of radial and axial sizes of the dust formations on the discharge current have been detected and analyzed. It has been found that dust clouds cons...
The diffusion-drift model of positive column of glow discharge in neon have been
used to study the effect of molecular ions in the interaction of plasma with dust particles of
micron size. Simulations have been carried out at a pressure of 20 – 100 Pa and gas
temperature of 77 K. The electric field of the discharge, the concentrations of discharge...
With the decrease of temperature, the “condensation” of dust particles with the formation of clusters has been detected. The transformation of complex dust structures with the change of the current of glow discharge in neon at a pressure of 20 Pa and a temperature of 77 K has been studied. The effect of discharge current on the shape and compositio...
Экспериментально получена граница (линия) перехода от сплошных пылевых структур к полым пылевым структурам в координатах «давление – ток разряда» в тлеющем разряде в неоне. Эксперименты выполнены для сферических частиц диаметром 2,55 и 4,14 мкм. Проведено моделирование линии перехода с помощью диффузионно-дрейфовой модели положительного столба разр...
The paper presents the results of the experimental measurement of electric characteristics of dc glow discharge with the hollow cathode in neon, carried out during cooling of the discharge to the temperature of liquid nitrogen. The experiments were performed at pressure P = 18-187 Pa and discharge currents I = 0.01-3.5 mA. The behavior of the borde...
The distributions of an average concentrations of ions in a positive column of glow discharge were simulated in pure neon and in plasma with micron size dust particles on the base of the drift-diffusion model. Simulations indicate that ion concentration within the dust structure may few times exceed that in a dust-free discharge. The discharge para...
Experimental and kinetic modeling study of the ignition of a stoichiometric mixture of acetone with oxygen diluted by argon was carried out behind reflected shock waves within the temperature range of 1350–1810 K for the total mixture concentration [M 50] ~ 10⁻⁵ mol/cm³. Emission signals were recorded simultaneously for three different wavelengths:...
The results of measurement and simulation of electrical characteristics of neon dc discharge are presented. These results have been obtained in the discharge cooled to the temperature of liquid nitrogen (77 K). The experiments were carried out at neon pressure of 18 - 187 Pa and discharge current of 0.01 - 3.5 mA. Cooling in the subnormal discharge...
The dependence of the shape of the dust structures on discharge current and pressure in neon glow DC discharge at temperatures 77 K and 295 К has been studied experimentally. It was found that when the discharge current was increased, the radial size of the dust cloud increased, and the axial size decreased. It was found that at 295 К the dust clou...
Мета. Вивчити ріст райдужної форелі та ефективність використання комбікорму за товарного вирощування цієї риби в басейновому рибному господарстві з використанням річкової води. Методи. Рибу вирощували за технологією, прийнятою для райдужної форелі. Результати. Установлено особливості накопичення маси риби залежно від сезонного коливання температури...
The effect of charged micron-size dust grains (microparticles) on the electric parameters of thepositive column of a low-pressure dc glow discharge in neon has been studied experimentally and numeri-cally. Numerical analysis is carried out in the diffusion-drift approximation with allowance for the interactionof dust grains with metastable neon ato...
The diffusion/drift model of the positive column of glow discharge in neon with fine dust particles was
used to study the role of dust cloud with void in interaction between plasma and dust particles in the range
of neon pressure and discharge current where dust particles may form structures with cavities. The results
represent the nonlocal effect...
The formation of structures consisted of dusty clusters in plasma at the discharge tube cooling to a temperature of liquid nitrogen was discovered. The dependence of the reduced electric field in the positive column of a discharge on gas temperature was experimentally measured. Depending on the pressure of neon were observed the different structura...
The electrical characteristics of the positive column of glow discharge were
measured and simulated in pure neon and in plasma with micron size particles. The increment of
the longitudinal electric field strength caused by the presence of dust structures was measured.
Simulation was based on the diffusion–drift model of the positive column of glow...
The experiments on the ignition of H2-O2 mixtures behind reflected shock waves were carried out. In these experiments the chemiluminescence of electronically excited OH* radicals (λ = 308 nm) at the early stage of the ignition induction period is studied over the temperature range of 800 < T < 1050 K at a pressure of 0.1 MPa. The OH* emission signa...
The autoignition of simple hydrocarbons, such as ethane, ethylene, and acetylene, in mixtures with oxygen diluted with Ar behind reflected shock waves in a temperature range of 1150-1800 K and a pressure of ~ 0.1 MPa is studied using the chemiluminescence from electronically excited CH* (λ = 430 nm), C2* (λ = 516.5 nm), OH* (λ = 308 nm), and CO2* (...
Experimentally and numerically is studied the effect of charged dust particles of micron size on the electrical parameters of the positive column of a low pressure dc glow discharge in neon. Numerical analysis is carried out in frames of the discharge plasma model in the diffusion-drift approximation, taking into account the interaction of dust par...
Plasma with dust structures containing internal cavities (dust-void) was numerically investigated. The radial profiles of plasma components and the radial and longitudinal components of the electric field were calculated on the base of diffusion/drift model developed for the positive column of glow discharge in neon with dust particles [1]. The for...
The article presents the results of experiments investigating the electrical characteristics of the
DC discharge with hollow cathode in neon and the discharge parameters on the boundary of the transition
to normal discharge at room gas temperature and the boiling point of liquid nitrogen at a pressure
of neon P=18-187 Pa and discharge currents of I...
The influence of dust particles on the concentration of metastable neon atoms and ionization was investigated using the developed drift/diffusion model for plasma of positive column of glow discharge. The detailed de-excitation in neon was considered. In addition to usual plasma losses in dusty plasmas, the quenching of metastable atoms on dust par...
Problems related to the autoignition of hydrogen-air mixtures are highly important for the operation safety of nuclear reactors and for hydrogen power engineering. In spite of extensive studies in this area, there are still many problems directly concerned with the ignition delay times of H2/O2 mixtures and with the conditions under which these pro...
The dependence of the form of dust structures on the current of glow discharge in neon is experimentally investigated. Under the increasing current the uniform in radial cross-section dust structures were transformed into the structures with the in cavity inside, which was free from dust particles. The potential energy of dust particles is calculat...
Phase diagram of dusty plasma in neon at 89 K with the isolines of the reduced values of longitudinal electric field is represented. The regions of existence of structured dust clusters and structural transition are shown to be characterized by higher values of reduced electric field than the regions of their melting and the regions with a homogene...
The main achievements of the investigations into cryogenic dusty plasma and the review of the
state of the studies carried out in this region are presented. The peculiarities of the cryogenic plasma of gas
discharges that affect the processes of selforganization of dusty plasma structures are discussed. The investigation of cryogenic dusty plasma i...
The main achievements of the investigations into cryogenic dusty plasma and the review of the
state of the studies carried out in this region are presented. The peculiarities of the cryogenic plasma of gas
discharges that affect the processes of self-organization of dusty plasma structures are discussed. The investigation of cryogenic dusty plasma...
Gas discharge chamber with dust particles sustained in a plasma of glow discharge may operate in a self-oscillating mode, i.e., provide periodical ignition and quenching of discharge. The frames from the video of dust structures involved in a self-oscillation mode of the glow discharge are presented.
The diffusion/drift model of the positive column of glow discharge in neon was used for the analysis of the role of neon metastable atoms in the interaction between neon plasma and dust particles. The radial profiles of electrons and metastable atoms were simulated in the typical range of neon pressure and discharge current where dust particles may...
Was discovered the formation of structures consisting from structures of clusters in dusty plasma at a temperature of liquid nitrogen. The dependence of the reduced electric field E/N in the positive column of a discharge from gas temperature was experimentally measured. Depending on the pressure of neon were observed the different structural trans...
The mechanism of self-sustenance of dust structures in plasma of dc glow discharge in neon is simulated using the diffusion/drift model. The heat release in a discharge is considered. Radial profiles of electron number density, electric field and gas temperature are represented for different values of dust particle concentration in a discharge.
Experimental and numerical study of positive column of glow discharge in neon with dust particles is presented. The influence of dust structures on integral parameters was measured and simulated. Spatial distributions of electrons and electric field configuration in presence of dust cloud are represented. The reverse radial electric field direction...
The effect of microparticles on the current–voltage characteristics (CVC) and on the distribution of plasma components in a positive column of a glow discharge in air is studied both experimentally and numerically. The analysis is carried out on the basis of a diffusion description of the plasma of a discharge and the description of flows of ions a...
The principal features of dust particles influence on plasma parameters
of positive column of glow discharge in neon at cryogenic temperature
are studied experimentally. It was found that the effect of dust
particles in cryogenic plasma is observed even at those values of
discharge currents and dust particle numbers, at which this effect was
not ob...
Experimental and numerical study of positive column of glow discharge in
air with disperse micron size particles is carried out with the aim to
describe changes of plasma parameters and electric field configuration
induced by cloud of particles.
We calculate the measured nonlocal parameters of the plasma of the positive column of direct current glow discharge in the
presence of dust structures with different dust particle concentrations. The calculations are performed for typical conditions
of the positive column of low-pressure glow discharge in air at which a collisional regime of mainta...
The study aims to describe plasma parameters changes induced by clouds of disperse micron size particles. Dust clouds were formed in the positive column of glow discharge in air at pressure 0.1–0.6
torr and current 0.1–3 mA. The simultaneous registration of discharge voltage and dust cloud parameters
was carried out. Experimental results were simul...
The study aims to describe plasma parameters changes induced by clouds of disperse micron size particles. Dust clouds were formed in the positive column of glow discharge in air at pressure 0.1–0.6 torr and current 0.1–3 mA. The simultaneous registration of discharge voltage and dust cloud parameters was carried out. Experimental results were simul...
The gas discharge–dust particle interaction for a dc discharge in air with micron-sized particles is investigated. The plasma of the dc column is described in the frame of diffusion approximation combined with the orbital motion limited approximation for ion and electron flow on the dust component surface. The problem is solved for dust particles o...
Micron size dust particles influence on nonlocal properties of complex gas discharge plasma are simulated. Plasma is described within limits of diffusion approximation, combined with OML approximation for dust component. The current-voltage characteristics as the easy-to-observe measure of dust influence on the total amount of charged particles, as...
Micron size dust particles influence on nonlocal properties of complex gas dis-charge plasma are simulated. Plasma is described within limits of diffusion approximation, combined with OML approximation for dust component. The current-voltage characteris-tics as the easy-to-observe measure of dust influence on the total amount of charged par-ticles,...
The formation of carbonaceous particles from the hydrogen-free precursors CCl4 and C3O2, both diluted in argon was studied behind reflected shock waves in the temperature range 1400 K ≤ T ≤3700 K and at pressures 1.3 bar ≤ p ≤ 4.5 bar. The appearance of particles was measured by laser light extinction (LLE) and by laser induced incandescence (LII)....
The formation of carbonaceous particles from the hydrogen-free precursors CCl 4 and C 3O 2, both diluted in argon was studied behind reflected shock waves in the temperature range 1400 K. T. 3700 K at pressures 1.3 bar. p. 4.5 bar. The appearance of particles was measured by laser light extinction (LLE) and by laser induced incandescence (LII). The...
The vibration-dissociation kinetics of CO2/N2 mixture is studied using three different models: 1) state-to-state approach, 2) quasi-stationary and 3) step-ladder approximations. Numerical simulations are aimed to describe the results of experimental findings in mixtures 2000 ppm CO2+N2 and 2000 ppm CO2+10%N2+Ar at Teq=2326-2855 K and Peq=0.75-2.59...
The spectral distribution of nonequilibrium emission from electron bands of partially dissociated CO2 in a supersonic jet was studied. A detailed model of kinetic and energy-exchange processes in a vibrationally nonequilibrium
recombining CO2 flow is elaborated. Within this model, the basic kinetic equation for the distribution of CO2 excited state...
C2 concentrations and populations of the ground and the first excited vibrational levels of electronically excited C2(d3Π) radicals during the thermal decomposition of C3O2 behind shock waves were monitored by emission and absorption measurements in the (0-0) and the (1-0) Swan-bands. Experiments were carried out in mixtures of 1% C3O2 + Ar and 1%...
A unified mechanism of the interaction of vibrational relaxation and dissociation of polyatomic molecules working in a wide
temperature range (from 2000 to 10000 K) is proposed, which is described by a double step-ladder model. Relaxation due to
collisions with the transfer of small and large portions of energy is taken into account. The transfer e...
Expressions are derived for the dissociation rate constants of molecules of carbon dioxide in the temperature range from 300
to 40000 K under both thermally equilibrium and nonequilibrium conditions. Under nonequilibrium conditions, the rate constants
are represented as a two-temperature dependence (on the gas temperatureT and on the unified temper...
Photodissociation of CO2 molecules initiated by a pulse of an Ar-F excimer laser in CO2/Ar, CO2/He, and CO2/N2 mixtures heated by a reflected shock wave in a shock tube is studied by means of atomic resonance absorption spectroscopy (ARAS). At equilibrium, a laser photon (λ=193 nm) is shown to be absorbed by molecules with internal energy E1=(0.92±...
The formation of electronically excited oxygen atoms O(1D) upon the thermal decomposition of carbon dioxide is experimentally studied in a high-vacuum shock tube by atomic resonance absorption spectroscopy (ARAS) at 4102-6375 K and 20-190 kPa in the mixtures containing 100-1000 ppm CO2 in Ar. The rate constant of the increase in the concentration o...
Our main concern here is to establish a correlation between the dissociation rate and vibrational energy distribution of CO2 molecules. The experimental approach consisted in setting up multimodal vibrational nonequilibrium in shock-heated CO2/N2/Ar mixtures and measuring the rate of CO2 decomposition by means of high-precision time-resolved atomic...
The spectroscopic data on the dissociation Of CO2 molecules in shock waves at T = 2500-4000 K and P = 10-30 atm are analyzed. The population distribution according to energy levels is obtained by numerical solution of the microkinetic equations in the step-ladder approximation. The dissociation rate constant and time evolution of the absorption-emi...
This paper presents an experimental and numerical analysis of the mechanisms by which electronically excited states of Ar atoms and ions in an ionized supersonic jet are populated. Nonequilibrium effects in ionized argon jets are analyzed numerically through an examination of the level-to-level recombination kinetics. The experiments were carried o...
