Federal Center for Dual Use Technologies Soyuz

Dzerzhinsk, Russia

Federal Center for Dual Use Technologies Soyuz

Dzerzhinsk, Russia
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Sadovnichii D.N.,Federal Center for Dual Use Technologies Soyuz | Markov M.B.,RAS Keldysh Institute of Applied Mathematics | Vorontsov A.S.,RAS Keldysh Institute of Applied Mathematics | Milekhin Yu.M.,Federal Center for Dual Use Technologies Soyuz
Combustion, Explosion and Shock Waves | Year: 2012

The main specific features of propagation of an electromagnetic pulse in a solid-propellant energetic system are studied by means of the numerical solution of three-dimensional Maxwell equations. A case with the electric field vector in the pulse being directed parallel to the structure centerline is considered. The effect of the solid propellant properties on specific features of the formation of electric fields inside the solid-propellant energetic system and in the ambient space is demonstrated. © 2012 Pleiades Publishing, Ltd.


Sidorov O.I.,Federal Center for Dual Use Technologies Soyuz | Vygodskii Y.S.,RAS Nesmeyanov Institute of Organoelement Compounds | Milekhin Y.M.,Federal Center for Dual Use Technologies Soyuz | Matveev A.A.,Federal Center for Dual Use Technologies Soyuz | And 4 more authors.
Polymer Science - Series D | Year: 2015

A study of the influence of ionic liquids on the curing and properties of a strengthening composition based on polyesterurethane rubber with epoxyurethane end groups has been carried out. The catalytic activity of ionic liquids has been found to be dependent on the anion chemical structure and to increase as the anion size decreases. It has been shown that introduction of methylbenzylamine and ionic liquid (1-ethyl-3-methyl-imidazolyl dicyanamide) results in strengthening compositions with close mechanical properties, lifetime, swelling in transformer oil, and glass transition temperature. © 2015, Pleiades Publishing, Ltd.


Lempert D.B.,RAS Institute of Problems of Chemical Physics | Dorofeenko E.M.,RAS Institute of Problems of Chemical Physics | Soglasnova S.I.,RAS Institute of Problems of Chemical Physics | Matveev A.A.,Federal Center for Dual Use Technologies Soyuz
Russian Journal of Physical Chemistry B | Year: 2016

The influence of the enthalpy of formation and elemental composition of CHNO-formulations on the relationship between the specific impulse and the combustion temperature is studied. © 2016, Pleiades Publishing, Ltd.


Milekhin Yu.M.,Federal Center for Dual Use Technologies Soyuz | Koptelov A.A.,Federal Center for Dual Use Technologies Soyuz | Matveev A.A.,Federal Center for Dual Use Technologies Soyuz | Baranets Yu.N.,Federal Center for Dual Use Technologies Soyuz | Bakulin D.A.,Federal Center for Dual Use Technologies Soyuz
Russian Journal of Physical Chemistry A | Year: 2015

Abstract Chemical reactions and physical transformations that occur upon heating aluminum hydride (AlH3, alane), stored for 25 years, in the temperature range of 50-1200 C in an atmosphere of nitrogen, argon, and air are studied by means of thermogravimetric analysis and differential scanning calorimetry. The heat of thermal decomposition and the hydrogen content are determined for the AlH3 samples and are found to be 318 ± 25 J/g and 9.32 ± 0.24 wt %, respectively. It is established that the estimated enthalpy of formation of AlH3 in stoichiometric composition (Δf H ≈ -10.3 kJ/mol) agrees with the literature data. After the release of hydrogen, the mass of the precipitate increases by 0.5 ± 0.3%, relative to the initial mass of the AlH3 samples; the most likely reason for this effect is the adsorption of nitrogen (argon) in the micropores and mesopores that form. Thermal phenomena associated with the crystallization of the amorphous aluminum that forms after hydrogen is released from the alane particles are analyzed. It is established that the aluminum contained in initial AlH3 samples is almost completely transformed into aluminum nitride and oxide (AlN and Al3O3) upon heating to 1200 C in nitrogen and air, respectively. © 2015 Pleiades Publishing, Ltd.


Bykov D.L.,Moscow State University | Martynova E.D.,Moscow State University | Mel'nikov V.P.,Federal Center for Dual Use Technologies Soyuz
Mechanics of Solids | Year: 2015

A method for describing the creep behavior until fracture of a highly filled polymer material previously damaged in preliminary tests is proposed. The constitutive relations are the relations of nonlinear endochronic theory of aging viscoelastic materials (NETAVEM) [1]. The numerical-graphical method for identifying the functions occurring in NETAVEM, which was proposed in [2] for describing loading processes at a constant strain rate, is used here for the first time in creep theory. We use the results of experiments with undamaged and preliminary damaged specimens under the action of the same constant tensile loads. The creep kernel is determined in experiments with an undamaged specimen. The reduced time function contained in NETAVEM is determined from the position of points corresponding to the same values of strain on the creep curves of the damaged and undamaged specimens. An integral equation is solved to obtain the aging function, and then the viscosity function is determined. The knowledge of all functions contained in the constitutive relations permits solving the creep problem for products manufactured from a highly filled polymer material. © 2015, Allerton Press, Inc.


Koptelov A.A.,Federal Center for Dual Use Technologies Soyuz | Milekhin Yu.M.,Federal Center for Dual Use Technologies Soyuz | Baranets Yu.N.,Federal Center for Dual Use Technologies Soyuz
Russian Journal of Physical Chemistry B | Year: 2012

A mathematical formulation of the polymer thermal decomposition model at random scissions of C-C bonds in the backbone is presented. The model is based on ideas about a macrokinetic character of the observed process Polymer → Gaseous products, and the thermofluctuation nature of the bond scission. The suggested approach makes it possible to calculate the decomposition rate in a wide pressure range at any initial molecular weight distribution of the polymer. As an example, a comparison of the calculation results for temperature-time dependences of the conversion degree and decomposition rate with experimental data obtained in isothermal and non-isothermal regimes is performed for linear polyethylene. © Pleiades Publishing, Ltd., 2012.


Sinditskii V.P.,Mendeleev University of Chemical Technology | Filatov S.A.,Mendeleev University of Chemical Technology | Kolesov V.I.,Mendeleev University of Chemical Technology | Kapranov K.O.,Mendeleev University of Chemical Technology | And 4 more authors.
Thermochimica Acta | Year: 2015

Abstract The physico-chemical characterization (thermal decomposition under non- and isothermal conditions, enthalpy of formation, burning behavior and flame structure) of a new explosive dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate is detailed. Combustion studies have shown that TKX-50 burns slightly faster than HMX and approaches the burning rate of CL-20. The combustion of TKX-50 has been shown to obey mechanism with the leading reaction in the condensed phase. The rates of TKX-50 decomposition in both solid and liquid phases proved to be slightly higher than the corresponding rates of decomposition of RDX. Decomposition of TKX-50 is determined by decomposition of free hydroxylamine formed in the reaction of dissociation of the salt. An intermediate decomposition product is ammonium salt of 5,5′-bis(2-hydroxytetrazole), which further decomposes in the second stage at elevated temperatures. The enthalpy of formation of TKX-50 has been measured with the help of bomb calorimetry, however the resulting value is quite different from the enthalpy reported earlier. © 2015 Elsevier B.V.


Rashkovskiy S.A.,Russian Academy of Sciences | Milekhin Y.M.,Federal Center for Dual Use Technologies Soyuz | Fedorychev A.V.,Federal Center for Dual Use Technologies Soyuz
Combustion, Explosion and Shock Waves | Year: 2016

Experimental data demonstrating the correlation of parameters in the power-law dependence of the burning rate of composite solid propellants on pressure are reported. The reasons for changes in the burning rate due to changes in propellant mixing conditions are discussed. The deviation of the pressure in the combustor of a solid-propellant rocket motor is analyzed with due allowance for the correlation of parameters in the burning rate law. It is shown that the relative deviation of the burning rate depends on pressure at which propellant combustion occurs. Moreover, for each propellant, there exists a pressure level at which the burning rate deviation is theoretically equal to zero, regardless of the differences in propellant compositions and properties. © 2016, Pleiades Publishing, Ltd.


Rashkovskii S.A.,Russian Academy of Sciences | Milekhin Yu.M.,Federal Center for Dual Use Technologies Soyuz | Klyuchnikov A.N.,Federal Center for Dual Use Technologies Soyuz | Fedorychev A.V.,Federal Center for Dual Use Technologies Soyuz
Combustion, Explosion and Shock Waves | Year: 2012

A model equation for the unsteady burning rate of a solid propellant is proposed and justified. In the frequency range of interest for practice, the proposed model agrees with the phenomenological theory of unsteady combustion, but it is even more convenient for applications because it reduces to an ordinary differential equation of the second order with respect to the burning rate. A parametric study of the transitional process in the solid-propellant rocket motor is performed with variations of the nozzle throat area in a wide range of solid propellant parameters. The model predicts oscillatory combustion regimes and propellant extinction in the case of a decrease in pressure. The boundary of stability of the transitional process in the coordinates "sensitivity of the burning rate to changes in pressure-sensitivity of the burning rate to changes in initial temperature." It is demonstrated that the calculations performed with the use of this model are in qualitative and quantitative agreement with experimental data for a full-scale solidpropellant rocket motor. © 2012 Pleiades Publishing, Ltd.


Milekhin Yu.M.,Federal Center for Dual Use Technologies Soyuz | Klyuchnikov A.N.,Federal Center for Dual Use Technologies Soyuz | Popov V.S.,Federal Center for Dual Use Technologies Soyuz | Mel'Nikov V.P.,Federal Center for Dual Use Technologies Soyuz
Combustion, Explosion and Shock Waves | Year: 2012

A software system is developed for solving an adjoint problem for modeling intrachamber processes of an axisymmetric solid-propellant charge attached to the casing. This system predicts intraballistic, strength, and gas-dynamic characteristics of the rocket engine during the full cycle of its operation. The study of the computed and experimental intraballistic characteristics demonstrates qualitatively new capabilities of the computational method and reveals some interesting features of internal ballistics of the solid-propellant rocket motor. Reduction or elimination of fitting coefficients in the predicted law of the propellant burning rate and reduction of the number of engine tests necessary for studying the characteristics are justified. It is shown that gas-dynamically stable operation of the engine is determined by Young's modulus of the propellant. © 2012 Pleiades Publishing, Ltd.

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