Dushanbe, Tajikistan

Osimi Tajik Technical University

Dushanbe, Tajikistan
Time filter
Source Type

Tavarov S.Sh.,Osimi Tajik Technical University | Sidorov A.I.,South Ural State University | Medvedeva Yu.V.,South Ural State University
2016 2nd International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2016 - Proceedings | Year: 2017

The paper lists operation features of the 500 kV overhead power lines in the Republic of Tajikistan. It presents the impact of the terrain and ambient air temperature on the change of electric field intensity of industrial frequency near the overhead 500 kV power lines. The results of calculations of residence time for line personnel in areas with different voltage of industrial frequency electric field within the working day are provided. Applicability of calculate cards for electric field intensity distribution of industrial frequency is useful at servicing these lines. The article provides the example of job organization at clearing the trails along the overhead power line located in the southwestern part of the Republic of Tajikistan. With the calculate cards of distribution of the electric field intensity of industrial frequency along the 500 kV overhead transmission lines, service works at these lines may be organized in such a way that the personnel work time near electric field will not exceed 8 hours. This reduces a negative effect of electric field of industrial frequency on staff serving the 500 kV line. © 2016 IEEE.

Manusov V.,Novosibirsk State Technical University | Kirgizov A.,Osimi Tajik Technical University | Ahyoev J.,Novosibirsk State Technical University
E3S Web of Conferences | Year: 2016

In this article the basic principles and classifications of small hydroelectric power stations depending on the power of system in which they work are provided. Especially, in the conditions of Tajikistan when all small hydroelectric power stations in some regions carry out the functions of big hydroelectric power stations. We suggest to use new classification by using function of fuzzy logic. The new concept of a power complex (HUB) on the basis of the renewed energy source (RES) is also offered. © Owned by the authors, published by EDP Sciences, 2016.

Berdiev A.E.,Russian-Tajik Slavonic University | Ganiev I.N.,Academy of Sciences of Tajikistan | Niezov K.K.,Osimi Tajik Technical University
Russian Metallurgy (Metally) | Year: 2017

The interaction of an yttrium-modified AK1M2 alloy with atmospheric oxygen in the temperature range 723–823 K is studied by thermogravimetry. The kinetic parameters of oxidation are determined. An yttrium addition is shown to decrease the oxidation rate, which is accompanied by an increase in the apparent oxidation activation energy from 114.9 to 134.6 kJ/mol. © 2017, Pleiades Publishing, Ltd.

Diyorov R.,Osimi Tajik Technical University | Glazyrin M.,Novosibirsk State Technical University | Sultonov S.,Novosibirsk State Technical University
Proceedings - 2016 11th International Forum on Strategic Technology, IFOST 2016 | Year: 2017

The mathematical model of Francis turbine operating at variable speed hydrounit. The results of numerical modeling are fully consistent with the physical representation of the behavior of the hydraulic turbine in dynamic modes. © 2016 IEEE.

Odinaev S.,Academy of Sciences of Tajikistan | Abdurasulov A.,Osimi Tajik Technical University
Ukrainian Journal of Physics | Year: 2016

A short review of theoretical and experimental works dealing with the research of acoustic parameters of some classical liquids and their solutions is made. On the basis of the analytical expressions obtained in the framework of molecular-kinetic theory for the sound velocity c(v) and the absorption factor α(v), as well as the choice of a model for the potential of intermolecular interaction Φ (|r|) and the radial distribution function g(|r|), the frequency dispersion of acoustic parameters for liquid N2, O2, and CH4 was numerically calculated in wide intervals of density and temperature. © S. ODINAEV, A. ABDURASULOV, 2016.

Odinaev S.,Academy of Sciences of Tajikistan | Akdodov D.,Tajik National University | Mirzoaminov K.,Osimi Tajik Technical University
Journal of Molecular Liquids | Year: 2011

Using the obtained kinetic equations for one-particle f1x→ 1,t and two-particle f2x→1, x→2,t distribution functions the frequency dispersion of shear ηS(ω) and bulk ηV(ω) viscosity coefficients of simple liquids are studied. The numerical calculations of the coefficients ηS(ω) and ηV(ω) for liquid Ar, Kr, Xe have been performed for definite potential of intermolecular interaction Φr→ and radial distribution function gr→ in broad temperature T, density ρ, and frequency ω ranges. The obtained results of theoretical calculations of viscosity coefficients of these liquids are in good agreements with the existed experimental data. © 2011 Elsevier B.V. All rights reserved.

Odinaev S.,Osimi Tajik Technical University | Mirzoaminov K.,Osimi Tajik Technical University
Ukrainian Journal of Physics | Year: 2010

Experimental and theoretical works studying the shear {eng}S and bulk {eng}V viscosity coefficients of simple liquids and the optimal choice of the intermolecular interaction potential Φ(r) and the radial distribution function g (r) are briefly analyzed. The last are used to determine the friction coefficient β and the relaxation times τ and τ0 as functions of the temperature T and the density ρ, as well as to numerically calculate the viscosity coefficients {eng}S(ω) and {eng}V (ω) in wide ranges of state parameters and frequencies. The obtained results are in satisfactory quantitative agreement with the theoretical and experimental data for liquid argon reported in the literature. © 2009.

The results of an experimental investigation of the thermal conductivity of aqueous solutions of trimethylhydrazine in the 293.5-568.9 K temperature range and the 0.101-49.1 MPa pressure range are presented. Empirical equations are obtained using the experimental data and the law of corresponding states. © 2013 Springer Science+Business Media New York.

Dzhuraev D.S.,Osimi Tajik Technical University | Safarov M.M.,National Research University Moscow Power Engineering Institute
Measurement Techniques | Year: 2016

Thermophysical properties (thermal diffusivity, conductivity and heat capacity) of ferrofluids are investigated by the laser flash method within the interval of magnetic field induction 1.594–3.866 mT while varying the content of added iron powder in the range of 0.1–0.3 g at room temperature. © 2016 Springer Science+Business Media New York

We consider the frequency dispersion region of the dynamic shear viscosity coefficient ηs(ω) of simple liquids obtained by the method of kinetic equations, where the equilibrium structure of a liquid is restored according to the diffusion law or exponentially. At a certain choice of the intermolecular interaction potential Φ({pipe}r{pipe}) and the equilibrium radial distribution function g0({pipe}r{pipe}), the coefficient ηs(ω) for liquid argon was numerically calculated as a function of the density ρ, temperature T, and frequency ω. The obtained theoretical values of the shear viscosity ηs(ω) are in a satisfactory quantitative agreement with experimental data. It is shown that the frequency dispersion region of ηs(ω) obtained on the basis of the diffusive mechanism, i.e. structural relaxation, is large (~ 105 Hz). In the case of the exponential attenuation of the viscous stress tensor, this region is narrow (~ 102 Hz), which agrees both with acoustic measurements and the results of a phenomenological theory. © 2011.

Loading Osimi Tajik Technical University collaborators
Loading Osimi Tajik Technical University collaborators