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Ткаченко, С. И.; Khishchenko, K. V.; Воробьев, В. С.; Levashov, P. R.; Ломоносов, И. В.; Фортов, В. Е.

doi:10.1023/a:1012324925983

Cited by 60 publications

(21 citation statements)

References 19 publications

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“…In the formation stage of the core-corona struc ture, the hot emitting region is just being created; therefore, the "cold start" simulations were per formed without allowance for radiative energy transfer in the framework of a one dimensional one tempera ture MHD model (see, e.g., [19,20]). In these simula tions, the table data on the properties of aluminum [21] were used.…”

Section: Results Of Simulations Performed From the "Cold Start"mentioning

confidence: 99%

Study of the core-corona structure formed during the explosion of an aluminum wire in vacuum

et al. 2012

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The time evolution of the matter parameters and current distribution in the discharge channel formed during a nanosecond explosion of a 25 µm diameter 12 mm long aluminum wire was studied in a series of experiments with the following parameters: the discharge voltage was U 0 = 20 kV, the current ampli tude was I max ~ 8 kA, and the current rise rate was dI/dt ~ 40 A/ns. Optical shadow and schlieren images of the discharge channel were obtained using the second harmonic of a YAG : Nd +3 laser, and UV images of the discharge channel self radiation were recorded using a four frame camera with a microchannel plate. The process of aluminum wire explosion was simulated numerically (including simulations performed from the "cold start"). The numerical results were compared with the experimental data.

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Section: Results Of Simulations Performed From the "Cold Start"mentioning

confidence: 99%

Study of the core-corona structure formed during the explosion of an aluminum wire in vacuum

et al. 2012

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“…(1)-(3). The following notation is used in the figure: ig and il indicate the isotherms of the chemical potentials of gas and liquid, respectively, calculated using the wide-range semiempirical equation of state [4,5]. Corresponding to the points of intersection of the ig and il lines is the equilibrium state of the liquid-gas system of pressure P s and chemical potential μ s in the absence of current.…”

Section: Phase Equilibrium In Current-carrying Conductormentioning

confidence: 99%

“…1, Δμ ≈ 2.5×10 4 J/kg and ΔP f ≈ 0.02 GPa; therefore, the initial velocity of scattering of droplets is u ≈ 200 m/s. The vapor pressure in the mixture is ~0.21 GPa, and the ambient pressure in the calculations of [5] is 0.1 GPa. In the case of adiabatic scattering of a two-phase droplet-vapor system (according to [29], droplets of less than 10 -5 cm in size are in thermodynamic equilibrium with surrounding vapor), the temperature of the mixture drops by approximately 4 kK, and the velocity increases bỹ 500 m/s.…”

Section: The Velocity Of Scattering Of Products Of Electric Explosionmentioning

confidence: 99%

Nucleation Mechanism of Explosive Destruction of Conductors of High Energy Density

2005

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The paper deals with the nucleation mechanism of the loss of thermodynamic equilibrium in systems of high energy density, namely, in current-carrying conductors and in cathode micropoints. The limiting value of energy is discussed which may be introduced into a current-carrying conductor prior to its explosion, as well as the characteristic sizes of droplets during subsequent dispersion, times of delay of micropoint explosions, and other effects accompanying such a mechanism of destruction.

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“…The investigations of thermodynamics parameters of porous materials including, in particular, the solid organic substances under shock-wave loading are of interest in many problems of modern science; in this regard new models appear for the description of the behavior of such materials, for example [1][2][3][4][5][6][7][8]. These investigations are important in solving the applied problems of dynamic compaction, shock-wave synthesis, and other explosive technologies.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic parameters of mixtures with epoxy as a component under shock wave loading

Maevskii

Кинеловский

2018

J. Phys.: Conf. Ser.

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Abstract. The results of numerical experiments on modeling of shock wave loading of mixtures are obtained by using thermodynamic equilibrium model TEC (thermodynamic equilibrium components) are presented. The thermodynamic parameters are modeled for the mixtures that include epoxy resin as a component. The model allows taking into account the phase transition under shock wave loading, when the substance in the region of phase transition is considered as mixture of low-pressure phase and high-pressure phase. Interest in the investigation of compressibility of such mixtures is associated as with the possibility of creating materials that have the required properties and the properties of the materials themselves. The good agreement of these model calculations with the data of different authors that defined on the experiments basis is obtained. The model allows to describe dynamic loading of solid and porous mixtures comprising epoxy resin and various components such as quartz SiO2, periclase MgO, corundum Al2O3, spinel MgAl2O4, enstatite Mg2[Si2O6]. IntroductionThe investigations of thermodynamics parameters of porous materials including, in particular, the solid organic substances under shock-wave loading are of interest in many problems of modern science; in this regard new models appear for the description of the behavior of such materials, for example [1][2][3][4][5][6][7][8]. These investigations are important in solving the applied problems of dynamic compaction, shock-wave synthesis, and other explosive technologies.Interest in the study of compressibility of mixtures comprising as component epoxy resin due to their properties [9,10]. The composite materials combining the properties of the components are created on base on these mixtures. Epoxy resins are characterized by high resistance to the action of halogens, some acids, alkalis; they also have high adhesion to metals. Additional properties of the composite materials are obtained by using various additives to the mixture. For example, quartz SiO 2 is widely used in optical and electronic devices, in the manufacture of silica refractories and quartz glass. An additional important property of quartz is the existence of polymorphic phase transition under shock wave impact. Substantial change in the volume of such components included in the mixtures allows expanding the range of changes of thermodynamic parameters of the mixtures under shock wave loading. Periclase MgO is important component of magnesite and dolomite refractory. Abrasive materials are produce from corundum Al 2 O 3 . Spinel MgAl 2 O 4 is rare mineral of cubic crystal structure. It is a mixed oxide of magnesium and aluminum (volumetric fraction MgO 28.2%; Al 2 O 3 71.8%). The name of mineral enstatite Mg 2 [Si 2 O 6 ] is derived from the Greek words ενστ ατ ης (enstates) "the enemy", "the resistance",

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Cited by 60 publications

References 19 publications

Study of the core-corona structure formed during the explosion of an aluminum wire in vacuum

Study of the core-corona structure formed during the explosion of an aluminum wire in vacuum

Nucleation Mechanism of Explosive Destruction of Conductors of High Energy Density

Thermodynamic parameters of mixtures with epoxy as a component under shock wave loading

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