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scientific edition of Bauman MSTU

SCIENCE & EDUCATION

Bauman Moscow State Technical University.   El № FS 77 - 48211.   ISSN 1994-0408

Power Engineering

Simulation of Heat Transfer to the Gas Coolant with Low Prandtl Number Value
# 06, June 2015
DOI: 10.7463/0615.0780763
T.N. Kulikova, P.V. Markov, V.I. Solonin
pp. 420-437
Experimental Study of Thermo-hydraulic Characteristics of Surfaces with In-line Dimple Arrangement
# 05, May 2015
DOI: 10.7463/0515.0776160
S.A. Burtsev, Yu.A. Vinogradov, N.A. Kiselev, M.M. Strongin
pp. 348-369
Neutron Yield from the Plasma of the Tokamak with Neutral Beam Injection
# 04, April 2015
DOI: 10.7463/0415.0765734
A.Yu. Chirkov, A.S. Volkov
pp. 326-335
Excitation of Turbulent Fluctuations by Unstable Drift Wave in Non-uniform Plasma Flow
# 11, November 2014
DOI: 10.7463/1114.0736412
D.N. Karbyshev, V.I. Hvesyuk, A.Yu. Chirkov
pp.800-816
Use of Distribution Devices for Hydraulic Profiling of Coolant Flow in Core Gas-cooled Reactors
# 09, September 2014
DOI: 10.7463/0914.0726747
A.A. Satin, V.I. Solonin, S.I. Getya
pp. 227-239
Cold Power Plant Based on the Cryogenic Refueling Tank
# 06, June 2014
DOI: 10.7463/0614.0716978
A.I. Dovgjallo, D.A. Uglanov, A.B. Tsapkova, A.A. Shimanov
The paper evaluates the possibility to use a tank with cryogenic refueling as a part of the autonomous complex employing the liquefied natural gas. A cryogenic refueling tank-based installation to utilize a low-grade heat has been designed. During its use extra electric power is generated. To assess a performance capability, the proposed installation calculations have been made for different end pressures in cryogenic refueling tank. In all embodiments, the mass of cryogenic refilled is 866 kg. Depending on the pressure an amount of extra electric power is produced owing to utilizing a low temperature potential of LNG. New values, such as the specific amount of extra energy are introduced. These values allow objective assessment of the potential for extra energy when using the cryogenic products with their subsequent regasification in cryogenic refueling tank taking into consideration the operational constraints and the working fluid flow. Cold energy power plant has been also designed to refuel vehicles with the natural gas. The total amount of generated electric power will be 3725.22 kW • h for 225 min. The action time of cold energy power plant, including the time of methane gasification in cryogenic refueling tank, time of refueling vehicles, and time of electricity generation will be 24 hours. The economic assessment of cold energy power plant has shown that the payback period is 3.4 years.
Development of Mechanical Loading Device for Testing the Zirconium Cladding Under the Pellet-Cladding Interaction Conditions
# 06, June 2014
DOI: 10.7463/0614.0715393
V.I. Solonin, A.S. Sotnikov, I.V. Sergienko
The article presents data on the development of the laboratory complex for determining a deformation capacity (mechanical properties) of the fuel rod claddings under pellet-cladding interaction (PCI) and controlled conditions specified by the following parameters: temperature, strain rate, hydrogen concentration, the concentration of corrosive medium (iodine). The article discusses the testing results of the mechanical loading device layout and the mechanical loading device (MLD) as such when stress is applied to Ø9.1x7.73 mm zirconium cladding from alloy E110 o.ch. at the temperatures of 380°C and 350°C via the plunger force acting on the simulator of fuel pellet made of aluminum oxide.
Structure of Two-Phase Adiabatic Flow in Air Sparging Regime in Vertical Cylindrical Channel with Water
# 06, June 2014
DOI: 10.7463/0614.0713566
V.I. Solonin, V.V. Perevezentsev, N.S. Isakov, V.B. Kuzero
Experimental research of two-phase adiabatic flow in sparging regime in cylindrical vertical channels with different levels of air volume rates was carried out. Vector velocity fields obtained using the optics methods were analyzed to identify a character of the air volumes motion, a bubbles shape, velocities of both phases, a character of the liquid phase motion in the lower part of channel, void fractions. Obtained data describe a structure of two-phase flows in-detail for various flow regimes and can be used as a verification base for math models in modern CFD-codes.
Detonation Wave Parameters in a Variable Cross Section Channel in Gas Mixture of Methane with Oxygen and Nitrogen
# 05, May 2014
DOI: 10.7463/0614.0712204
G.Y. Bivol, S.V. Golovastov, A.Yu. Mikushkin
Propagation of the detonation wave in gas mixtures of methane with oxygen in a channel of variable cross section was studied experimentally. Detonation initiation was carried out by spark gap. Deflagration-to-detonation transition was occurred. A composition of the mixtures was selected in such a way that the detonation cell width was several times smaller than the diameter of the channel. The waves velocities and peak pressures at the front of the detonation wave were measured depending on the mixture composition, including a presence of nitrogen. The sizes of the detonation cells were measured using smoked foil mounted inside the channel. The effect of the interference of the shock waves in a conical section was studied. Diagrams of the shock waves, flame fronts, and detonation waves in the combustion chamber depending on the mixture composition are presented.
Investigation of the Helium Proportion Influence on the Prandtl Number Value of Gas Mixtures
# 05, May 2014
DOI: 10.7463/0514.0710811
S.A. Burtsev, D.S. Kochurov, N.L. Schegolev
The paper investigates an influence of helium fraction on the Prandtl number value for various gas mixtures. It is shown that a low value of the Prandtl number allows us to raise efficiency of gasdynamic energy separation in Leontyev's tube. The paper conducts a numerical research of the influence of gas mixture composition on the Prandtl number value, and verifies the calculation procedure, using the known experimental data and calculation results of other authors. It is shown that there are binary mixtures of the "light" and "heavy" gases, possessing abnormally low value of the Prandtl number, and the used calculation procedure allows correct calculation of their thermo-physical properties.
Yield Surface Investigation of Alloys During Model Disk Spin Tests
# 05, May 2014
DOI: 10.7463/0514.0710005
E.P. Kuzmin, A.N. Servetnik
Disks of gas-turbine engine are high loaded parts of irregular shape having intensive stress concentrators wherein 3D stress strain state occurs. The loss of load-carrying capability or burst of disk can lead to accident or disaster. Therefore, development of methods to assess deformations and to predict burst is one of the critical goals. The article presents results of quasi-static numerical simulation of spin tests of model disk made from high-temperature forged alloy. To determine stress-strain state of disk during loading finite element analysis is used. Simulation of elastic-plastic strain fields was carried out using the incremental theory of plasticity with isotropic hardening. V.Mises and Tresca yield criteria impact on the model sensitivity was investigated. To identify the material model parameters the eddy current sensors were used in the experimental approach to measure rim radial displacements during the load-unload of spin test. The results of calculations made using different parameters of material model were compared with the experimental results.
The electrohydraulic balance of the solar heat storage with autonomous power supply
# 02, February 2014
DOI: 10.7463/0214.0697540
M.K. Marahtanov, D.V. Duhopel'nikov, S.G. Ivakhnenko, V.I. Krylov
The paper considers an autonomous solar heat storage scheme with photoelectric cells for the hydraulic pump. It describes a method for calculating the power density of solar radiation during the day. To calculate the energy balance of the hydraulic system of autonomous solar collector the authors offer a methodology relevant for designing the similar systems. The curves obtained allow calculating the main parameters of the system components, including the required minimum area of absorber and photoelectric cells, pump power, water flow. The typical values of photoelectric cells area required for operation under typical environmental conditions were obtained.
Numerical investigation of heat transfer in flat vortex channels
# 01, January 2014
DOI: 10.7463/0114.0696278
УДК: 536.24
N.V. Kukshinov, M.S. Frantsuzov
The vortex channels is the method of heat transfer intensification which combines increase of surface area (finned wall) and enhanced convective cooling. The vortex channels is a duct formed by combination of two plates with milled fins intersected at different angles. The investigation of heat transfer and hydraulic characteristics in vortex channels was carried out by means of CFD. Flow was simulated in wide range of Reynolds numbers, heat and hydraulic characteristics were obtained for this duct. It was shown that the sum intensification effect is comprised of convective component and the effect of surface area increase. It was shown that flat vortex channels provide to transfer the higher heat flux, than finned wall at the same conditions.
On percutaneous injection of toxic substances into the human organism from the workplace atmosphere
# 01, January 2014
DOI: 10.7463/0114.0671133
S.P. Babenko, A.V. Bad'in
This article describes theoretical research methods of percutaneous injection of uranium hexafluoride and its hydrolysis products into the human organism. Integral and differential models were considered. Capabilities of each model were described. Results on the settling of uranium and fluorine onto the skin surface, on the deposition of those substances in the organism in emergency situation and under regular industry conditions were obtained using both specified models and presented in this paper. The distribution of uranium over separate organs was also presented. It was shown that under certain operating conditions at the place of production, accumulation of uranium in the kidneys exceeds critical value that leads to their disease. The importance of obtained results for solving the matters of protection of employees from occupational diseases and medical assistance to those in emergency situation was demonstrated.
 
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