Vol 10, No 1 (2011)

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING
Heat exchange parameters of units and pipelines of the aircraft hydraulic system
Nikolayev V.N.
Abstract

A method of determining heat exchange parameters of the aircraft hydraulic system units and pipelines has been developed and investigated. A model of the real unit heat exchange has been constructed and formulas for the calculation of heat-transfer coefficients of the unit and pipeline are proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):9-18
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Theoretical and experimental analysis of the thermal state of transport aircraft compartments thermal state
Nikolayev V.N.
Abstract

Mathematical modeling of the thermal state of various types of compartments when solving direct and inverse problems of heat exchange is proposed. The results of mathematical modeling of the thermal state of hermetic heat-insulated compartments of transport aircraft are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):19-30
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Optimal program of controlling continuous low thrust in the flight between noncoplanar elliptical and geostationary orbits
Fadeenkov P.V., Ishkov S.A.
Abstract

The paper deals with the problem of creating an optimal program of controlling low-thrust spacecraft in the flight between noncoplanar elliptical and geostationary orbits. A scheme for the joint change of orbital elements within the simple structure of the thrust vector control on the orbit turn is suggested.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):31-37
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Definition of directions of developing methods, technical decisions and means of decreasing the technogenic influence on the environment for the omplementation on board of space launch vehicles
Shatrov Y.T., Baranov D.A., Trushlyakov V.I., Kudentsov V.Y.
Abstract

Proposals to reduce anthropogenic pollution on the environment caused by separating parts of space launch vehicle and upper stage (boosters) with liquid propellants are under consideration. Residual power sources that can not be used directly are gasified before being fed into the combustion chamber of a gas rocket engine. Different design and construction solutions of active on-board systems to reduce anthropogenic pollution, using all types of energy resources available on board of upper stage (boosters) are discussed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):38-48
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MECHANICAL ENGINEERING AND POWER ENGINEERING
Laws of distribution and unbiased estimates of numerical indexes for process reproducibility
Barvinok V.A., Bogdanovich V.I., Plotnikov A.N., Plotnikov V.A., Ryzhakov M.V.
Abstract

Laws of distribution are established and numerical characteristics of selective numerical indexes for the process reproducibility are obtained. Positive displacement of the estimations accepted in the operating standards is revealed and compensated. More efficient unbiased are proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):49-55
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Fatigue resistange of turbine blade roots under combined stress
Gladkov A.V., Solyannikov V.A., Zhuzhukin A.I.
Abstract

The paper presents the results of experimental study of vibration proof of gas turbine engine turbine blade roots made of ZhS30 monocrystal structure alloy under conditions of asymmetric vibration stress. The influence of different kinds of blade root surface hardening on the ultimate strength value was studied. Considerable reduction of ultimate stress after blade running has been found.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):56-61
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Opntimization of business processes for design and technological planning of production using SADT technologies for the Samara metallurgical plant "ALCOA"
Zelenev A.V., Khaimovich I.N.
Abstract

The main problem of the article is the optimization of business processes with the help of SADT technologies using activity based costing method.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):62-68
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Kinematic and dynamic analysis of the basic mechanism of the Wankel engine, based on its vector model
Kosenok B.B.
Abstract

The description of Wankel engine, its block diagram and vector model are given in the paper. Comparative analysis of the dynamics of Wankel engine and the slider-crank mechanism of a "classical" internal combustion engine is carried out.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):69-75
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Serviceability of the rolling contact of rings and bending strength of textolite cage rivets of ball bearings in helicopter transmission
Kurushin M.I., Kurushin A.M., Zhilnikov Y.P.
Abstract

This study presents the numerical investigation of the behaviour of ball bearing 35-2310118E3C1 and its ability to work in helicopter transmission. A simplified mathematical model of transmission with ball bearings on rubber supports has been developed. The model was constructed taking into account the interaction between the cage and rings. The contact durability of bearing rings is calculated on the basis of "basic forces" and textolite cage rivet lifetime. Maximum allowable disbalances and vibratory velocities of transmission elements have been set depending on the cage rivets lifetime. Recommendations to increase the rivets lifetime are given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):76-85
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Residual stresses and fatigue resistance of surface-hardened notched cylindrical specimens made of steel 20
Semyonova O.Y.
Abstract

Regularities of residual stresses in smooth cylindrical specimens and specimens with semicircular profile notches after outstripping superficial plastic deforming and their influence on the endurance limit of solid and hollow specimens made of steel 20 under stress concentration have been analysed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):86-92
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Carbothermal synthesis of fine-dispersed tantalum monocarbide powder
Simonenko Y.P., Ignatov N.A., Yezhov Y.S., Sevastyanov V.G., Meshalkin V.P., Kuznetsov N.T.
Abstract

Combination of the sol-gel technique, which allowed us to obtain fine-dispersed, homogenious, active starting system Ta2O5 - C, and carbothermal synthesis under vacuum resulted in nano-sized tantalum monocarbide synthesis at a relatively lowtemperature of 1200±50°C. The obtained product was investigated by means of XRD-analysis and transmission electron microscopy. The average size of TaC particles is 20-40 nm, the size of crystallites (calculated by the Sherrer method) is 4-8 nm.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):93-100
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Analysis of the effect of technological parameters of rolling on the optimization of rolling milladjustment programs
Tlustenko S.F.
Abstract

Increasing the efficiency of optimization of reduction regimes in automated rolling mills is connected with the development of theoretical models and principles of systematization of numerous factors for the purpose of obtaining the necessary values of the displacement of pressure devices of the stands by controlling systems.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):101-109
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Forming of the structure and properties of titanium alloys according to mechanical properties in the processes of plastic working of metals
Tlustenko S.F., Pervyshin A.N.
Abstract

The paper deals with the problems of determining optimal phase composition and structure, the proportion of phases of titanium alloys of mixed α-β and α structures, as well as the influence of heat treatment on the mechanical characteristics for providing improved characteristics of mechanical treatment and the quality of products.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):110-119
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Optimization of thermomechanical parameters of high speed forging of titanium alloys
Khaimovich A.I., Mikheyev V.A.
Abstract

The solved problem deals with the definition of forging thermomechanical parameters of titanium alloys in conditions of pulse loading. The solution is based on the mathematical model, which generalizes the results of experiments on high-speed upsetting of titanium samples.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):120-128
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Using the energy of gas differential pressure in electromagnetic injectors for improved breathing of spark-ignition internal combustion engine cylinders
Shishkov V.A.
Abstract

Using the energy оf gas fuel differential pressure in electromagnetic injectors fоr improved breathing оf fuel-air mixture in cylinders by ejectiоn depends оn the chоice оf the place оf injectiоn, its directiоn and gas differential pressure in the injectors. A calculatiоn algоrithm is develоped оn the basis оf an elementary scheme fоr the оptimizatiоn оf these parameters. Its efficiency is estimated, and the results are cоmpared with the experimental data.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):129-136
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ELECTRONICS, MEASURING EQUIPMENT, RADIO ENGINEERING AND COMMUNICATION
Calculating the parameters of eddy current converters when testing several samples of cylindrical shape
Gainullina G.M., Polulekh A.V.
Abstract

Analytical expression for the vector potential of a secondary electromagnetic field of two elliptical cylinders located in an alternating homogeneous magnetic field is obtained. Leontovich boundary conditions have been used in the process of deriving, with subsequent use of the boundary collocation method. The calculation of the vector potential amounts to the solution of a finite system of algebraic equations. The expression obtained makes it possible to simplify the calculation of the parameters being introduced, i. e. the parameters of eddy-current converters of displacement of samples having discontinuous surfaces.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):137-143
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Discrete-phase movement transducers for the determination of turbine blade vibration parameters
Danilin A.I., Grechishnikov V.M.
Abstract

A new class of measuring transducers is described. They are intended to control angular and linear blade tip movements of turbounits. These transducers use the discrete-phase method (blade tip timing) and their special feature is the determination of discrete blade vibration phases by the primary transducer in which the object of the control, the source and the receiver of the probe radiation of either optical or radiofrequency range are constructively and physically integrated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):144-149
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Technique of operational monitoring of blade operational life exhaustion on turbounits
Danilin A.I., Grechishnikov V.M.
Abstract

A technique of operational monitoring of blade operational life exhaustion is proposed, based on the experimental data received with the help of discrete-phase movement transducers which use the discrete-phase method (blade tip timing).

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):150-154
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Mathematical model of the inline sensor based on matrix photodetector
Kornilin D.V.
Abstract

The paper deals with the descriptiou of the method for the measurement of particle sizes using an inline sensor based on matrix photodetector. The case when the size of particles is smaller than the size of matrix sensor pixel is described. An analytical formula is proposed for particle size estimation depending on the charge accumulated by the pixel of CMOS matrix. The authors evaluate the sensitivity of the CMOS sensor at a given signal/noise ratio.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):155-161
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Problems of simulation and calculation of modes of electrical engineering complexes and off-line systems of electrical power supply
Kubarkov Y.P., Goldshtein V.G., Amelin S.V.
Abstract

The paper deals with the object-oriented approach to the creation of a system for the simulation of power objects, methods of representation of objects, their condition, properties, as well as ways of storage of these objects in an ordered way. It is shown how with the help of conventional functions in off-line systems of electrical power supply it is possible to solve design - analytical and directory problems. To solve the problems of controlling electrical engineering complexes, as well as for the automated management of static and dynamic information about the equipment and modes of its activity the information analytical system (1АС) "Pegas" is designed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):162-169
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Using statistical Markov models for the analysis of electromagnetic compatibility of autonomous electric installations
Kubarkov Y.P., Goldshtein V.G., Inahodova L.M.
Abstract

The paper deals with the basic principles of stochastic modeling in problems, related to the analysis of electromagnetic compatibility (EMC) of electric equipment of autonomous electric installations. Conditions of solving EMC problems are stated on the basis of Markov and Kolmogorov equations, as well as construction of filters taking into account physical processes in electric installations (EI).

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):170-177
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Modeling of ionization effects in integrated-circuit elements due to radiation
Fortinsky Y.K.
Abstract

Proposed models of calculation of ionization current in semiconductor structures which arises under the influence of pulse radiating effect of gamma radiation are described. The current is defined taking into account the ambient temperature and the topology of elements of microcircuits, as well as the influence time. Besides, the effects of nonlinearity characteristic for the high dose capacity of gamma radiation are taken into consideration.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):178-182
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Modeling thermal and thermomechanical effects in elements of microcircuits for the design of aircraft control airborne equipment
Fortinsky Y.K.
Abstract

The paper deals with the proposed models of initiation of thermal and thermo mechanical effects under the influence of x-ray radiation. The warming-up temperature and the numerical value of pressure in elements of microcircuits are defined.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):183-191
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CONTROL, COMPUTER SCIENCE AND INFORMATION SCIENCE
Leader competition in biological and social systems
Pivovarova A.S., Steryakov A.A.
Abstract

А model of public opinion competition in social and biological systems is introduced on the basis of the Vicsek model, which is an analog of the Ising model. The process of collective behavior formation in systems with two competitive groups of leaders is discussed. A program for computational investigation and visualization of transient processes in this model is developed. Characteristics that affect the quickness and the result of competition between two types of leaders are revealed. The parameter map of the number of individuals who remain beyond the leaders’ influence is drawn.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):192-203
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Algorithm of adaptation of an electronic control system of internal combustion engines to various chemical compositions of gas fuel
Shishkov V.A.
Abstract

An algorithm of automatic adaptation for the system of electronic control of internal combustion engines working on gas fuel with various chemical compositions is proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):204-213
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HUMANITIES
Analysis of economic and organizational problems in aircraft engine construction
Nikitin N.F., Cherner N.V.
Abstract

The paper presents the analysis of the industry’s current state and the efficiency of its functioning. The causes of low competitiveness of the products of Russian aircraft engine construction and the ways of dealing with the industry’s system crisis are analysed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):214-226
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Analysis of the terminological status of the «overall cost» concept (methodological aspect)
Sosnina T.N.
Abstract

The paper analyses the phenomenon of overall cost in its up-to-date versions in the context of the postulates of the theory of the object of labour. The conclusion about accepting use value as the dominant parameter of financial reports is proved.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(1):227-235
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