Vol 10, No 2 (2011)

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING
Determination of mass-power propertions for parametric range of launch vehicle modifications
Baranov D.A., Yelenev V.D.
Abstract

Let’s consider the method allowing to solve the problem of rational distribution of Tsiolkovsky’s numbers in stages and define the appropriate mass-power proportions for the parametric range of launch vehicle modifications where the stages are shaped from the universal rocket units. The problem solution converges to the general task of non-linear programming. The method is described for a version of a two-stage launch vehicle. But it can be easily applied to the versions with a great number of stages.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):10-17
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Promising technologies for solving boundary problems regarding the delivery of separating parts of carrier rockets with terminal targeting
Benevolsky S.V., Goncharenko V.I.
Abstract

An unconventional approach to the realization of terminal targeting even at the early stages of flight of carrier rockets, i.e. – during the flight in the Earth atmosphere is proposed. Ballistic aspects of the possibility of such targeting are justified and a technology of motion programming is proposed. This technology provides the reduction of the drop area of separating parts during the realization of the terminal method of targeting carrier rockets in the Earth atmosphere.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):18-28
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Research of gasodynamic seal characteristics under transient conditions of aircraft engines and power plants
Vinogradov A.S.
Abstract

The paper presents the results of seal tightness calculation during different operation modes in an aircraft engine. The assessment of tightness is carried out along with the calculation of seal ring deformations and identifying the unit vibrating condition.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):29-37
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Designing a seal as an element of air secondary system in aircraft engines
Vinogradov A.S.
Abstract

The article deals with the algorithm of designing seals as elements of a general air secondary system of the engine. The algorithm combines calculations of hydraulic resistance, thermal condition, stress and deformation condition, aircraft engine parameters in different program complexes.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):38-46
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Application of the shape memory effect in an aerodynamic surface deployment unit of guided missile
Dyupin A.P., Pushin V.G.
Abstract

The results obtained during the investigation of the shape memory effect in NiTi alloys have been applied in practical designs of the aerodynamic surface deployment unit of a guided missile. The subjects under discussion are estimation of the efficiency of the developed unit, operating conditions, and analysis of successful application of components made of materials with the shape memory effect in newly developed units of the latest aircraft.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):47-55
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Flight-navigation complex diagnostics at the aircraft manufacture stage
Koptev A.N., Kirillov A.V.
Abstract

The paper deals with the problem of diagnosing flight navigation complexes at the stage of aircraft manufacture. Methods of introducing the complex structure and its systems on the basis of tensor methodology have been proposed. They make it possible to simplify the algorithm of forming the set of diagnosable parameters considerably and to apply new approaches to the diagnostics of flight navigation complexes. The flight navigation complex of AN-140 aircraft is taken as an example.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):56-63
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Applied problems in the theory of diagnostic process for aircraft flight-navigation complexes
Koptev A.N., Kirillov A.V.
Abstract

Problems of flight-navigation complex diagnostic analysis are discussed. Methods of complex morphology description based on graph and tensor theories are suggested. These methods make it possible to simplify the algorithm for the creation of a set of diagnosable parameters on the basis of physical and analytical division into circuits, nodal pairs and open chains. The state evaluation is implemented on the basis of a “compound-tensor” which includes all parameters of separate elements.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):64-72
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Problem of synthesis of a model for control and diagnostics in the manufacture of onboard equipment
Koptev A.N., Kirillov A.V., Yakovenko N.A., Dronov D.Y.
Abstract

The paper is devoted to problems of synthesis of a model of a network for control and diagnostics in the manufacture of onboard equipment. The problem of synthesis of a network is formulated; conditions of preference on the basis of a set of possible solutions of problems of designing a manufacturing network are presented; general approaches to the solution of particular problems of engineering designing and synthesis during the construction of models of production processes being designed on the basis of tensor analysis and the pattern theory are defined.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):73-79
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Statistical phenomena of greater distributed clusters of nanosatellites
Mostovoy J.A.
Abstract

The paper deals with the solution of the Earth remote sensing problem by a cluster of ordinary nanosatellites combined in a network and distributed over the inter-turn interval of the orbit. The number of nanosatellites in a cluster used to perform global observations for 24 hours can be determined by statistical modeling on square matrices, taking into account uncontrollable and random position of such satellites in a cluster. Another statistical phenomenon is investigated along with the percolation threshold, namely, the point of maximum clusterization possessing robustness.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):80-90
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Airfoil shape optimization using the adjoint gradient method
Pechenik E.V.
Abstract

The problem of airfoil shape optimization is considered. The original objective function is formulated which takes into account the aerodynamic and mass characteristics of airfoil. The optimization problem is solved by the adjoint gradient method for the incompressible viscous flow. The primal problem is solved by the SIMPLE algorithm using the Star-CD software. Adjoint equations are solved by the SIMPLE adapted algorithm.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):91-97
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Symmetric airfoil shape optimization using the adjoint gradient method for viscous turbulent incompressible flow
Pechenik E.V.
Abstract

The problem of minimizing drag of symmetric airfoil at the given area and chord is dealt with. Optimization is obtained by the adjoint gradient method for an incompressible viscous flow. The primal problem is solved by the SIMPLE algorithm using the Star-CD software. Adjoint equations are solved by the SIMPLE adapted algorithm.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):98-105
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Application of Cebeci’s method for solving time-dependent problems of the incompressible boundary layer
Kharitonova A.N., Shakhov V.G.
Abstract

The opportunity of using the Cebeci method to solve time-dependent problems of the incompressible boundary layer is dealt with in the paper. The method helped to solve the problems of analyzing the boundary layer on a flat plate streamlined in the longitudinal direction; the flow around a circular cylinder in the transverse direction; the longitudinal flow of the NACA 0012 airfoil for the zero angle of attack; the flow around a moving circular cylinder for the case of laminar non-stationary boundary layer.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):106-111
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Optimum programs of correction of quasielliptical and circular orbits of spacecraft with the limited-thrust engine
Khramov A.A.
Abstract

The paper deals with the problem of optimal correction of quasielliptical and circular orbits with limited thrust engines in the Earth central gravitational field with the use of spacecraft motion model for Laplace vector components. The control structure on the turn is justified the motion equations are averaged and their accuracy is assessed. The influence of the level of acceleration caused by thrust on the optimal control structure is investigated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):112-122
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MECHANICAL ENGINEERING AND POWER ENGINEERING
Some results of experimental refining of a constant volume valve combustion chamber
Bogdanov V.I., Kuznetsov S.P.
Abstract

The high-level performance constant volume valve combustion chamber is intended for advanced power generating engine systems with a pulsating work process. The review of both published basic results obtained during the investigations and the new ones with recommendations for further chamber improvement is presented. The chamber can be applied in pulse jet engines, as initiator of detonation in detonation engines, as well as in gas-dynamic lasers and MHD generators.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):123-130
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Research of errors of measuring angular location parameters of holes in turbine and compressor discs of gas turbine engines
Bolotov M.A., Zhidyaev A.N., Shitarev I.L., Cheveleva A.O.
Abstract

Models of measuring errors of angular location parameters of holes in turbine and compressor discs of gas turbine engines are developed using the probability theory and mathematical statistics. Research of measurement error dependence on various factors has been carried out.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):131-139
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Models and methods of optimizing the procedure of measuring gas turbine engine parts using coordinate measuring devices
Bolotov M.A., Lyozin I.A.
Abstract

The article deals with measurement techniques and methods of their optimization using the provisions of the probability theory and mathematical statistics. Dependence of measurement techniques on technological heredity is investigated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):140-149
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Construction of a promising face gas-dynamic seal of the aircraft engine
Bondarchuk P.V., Falaleev S.V.
Abstract

The paper deals with the prospects and urgency of using front gas-dynamic seals in the aircraft engine. An original construction of the aeroengine front gas-dynamic seal is proposed. This construction minimizes the probability of oil ingress into a tribological pair.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):150-157
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Design of sheet and strip rolling modes for drawing articles with minimal earing
Grechnikov F.V., Erisov Y.A., Aryshensky E.V.
Abstract

The paper presents the research of crystallographic orientation formation during the rolling of sheets from aluminum alloy 8011A and the influence of such orientations on anisotropy and earing. The main orientations in this alloy are the cubic {001}<100>, nearcubic {210}<001> textures, the rolling {112}<111> and S-{123}<634> textures and the orientation {011}<112>. The paper shows that changes in the rolling and heat treatment modes lead to different combinations of the mentioned grain orientations and consequently to variant anisotropic properties. The new technological parameters of 8011A sheet production have been developed to eliminate earing during drawing.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):158-167
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Fast algorithm for finding the resonance frequencies of gas turbine engine rotating blade disks
Davydov D.P.
Abstract

A fast algorithm for finding the resonance frequencies of gas turbine engine rotating blade disks has been developed. The algorithm is based on the use of interpolation function in the frequency domain. The algorithm does not require a resonance diagram. Comparative analysis of the resonance frequencies of model blade disks has been carried out.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):168-171
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Construction of a blade beam finite element as a component of the blade disk rotary-symmetrical system
Davydov D.P.
Abstract

The blade wave finite element has been developed. A FORTRAN code program has been developed for the modal analysis of rotating nonuniform heated blades of gas turbine engines. Natural modes of oscillation of two compressor blades have been analysed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):172-176
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Design of bimetallic impeller for gas turbine
Magerramova L.A.
Abstract

A bimetallic impeller structure obtained by HIP made out of powder and cast Ni-base super alloys was developed. The strength estimations were carried out by the ANSYS program with the help of 2D models.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):177-185
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Transformation of longitudinal deformation wave at the boundary of conjugation of bars with an elastic element
Manzhosov V.K., Novikova I.A.
Abstract

The paper deals with the process of transformation of longitudinal deformation wave at the boundary of heterogeneous bars with a linear elastic element. The procedure of numerical computation of deformation wave transformation process in a bar system is presented. The results of modeling are compared with the analytical solution for a test problem.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):186-193
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Estimation of the adequacy of electronic flow model and efficiency characteristic of small centripetal turbine drive
Matveev V.N., Shabliy L.S.
Abstract

A design efficiency characteristic of a centripetal microturbine drive has been obtained with the help of its electronic model constructed in the ANSYS CFX program complex. The adequacy of the design characteristic to the results of experimental investigations with the use of regression analysis has been assessed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):194-199
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Analysis of the applicability of laser stereolithography technology for the production of turbodrives
Shabliy L.S.
Abstract

The possibility of using prototypes produced by laser stereolithography as parts of small-sized turbodrives is analysed. Both calculation analysis using the finite element method and an experimental one – on a special test-bed-have been carried out. As a result, the possibility of using such prototypes in turbodrives with the rotor speed limitation up to the level at which equivalent stresses in the parts do not exceed 40 MPa was established.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):200-205
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ELECTRONICS, MEASURING EQUIPMENT, RADIO ENGINEERING AND COMMUNICATION
Formation of 3D focal domain with peak for applications of multiphoton polymerization
Khonina S.N., Pavelyev V.S., Chichkov B.N.
Abstract

The scalar diffractive theory (in paraxial and non-paraxial cases) has been used for the investigation of focal domain for lens+axicon and lens+logarithmic axicon optical systems. It was shown that focal domain has a peak with a subwavelegth feature size. The use of this peak with shifting of the remaining part of the focal domain into the substrate makes it possible to improve the resolution for applications of multiphoton polymerization.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):206-214
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CONTROL, COMPUTER SCIENCE AND INFORMATION SCIENCE
Dynamic positioning of a manned submersible over the service object
Alekseev A.V., Olenin A.L., Smirnov G.V., Fendrikov A.N.
Abstract

The paper deals with the possibility of producing a dynamic positioning system for manned submersibles over the service object. The dynamic positioning system is a part of the navigation system for a manned submersible.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):215-223
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Constructing simulation models of self-similar telecommunication traffic
Blagov A.V.
Abstract

The paper describes the construction of simulation models of telecommunication traffic. We present the realization of such mathematical models as «Input M/G/∞» and «On-Off Sources» in the AnyLogic simulation modeling environment. The concept of jitter in telecommunication traffic is described. Characteristics of real traffic routes are compared with those of simulated ones.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):224-231
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Increasing the information content of optical coherence tomography skin pathology detection
Zakharov V.P., Larin K., Bratchenko I.A.
Abstract

A mathematical model of optical radiation interaction with skin tissues is constructed, which takes into account the effects of stimulated Raman scattering. On the basis of numerical experiments the features in the Raman scattering spectra are revealed to characterize skin abnormalities. The possibility of significant increase in information content for optical coherence tomography and Raman spectroscopy joint usage is shown. Recent improvement is achieved by significantly reducing the volume of diagnostic measurements during the tissue layers isolation with the help of OCT, followed by their analysis by Raman spectroscopy. Differences in Raman scattering intensities for abnormal and normal tissue layers are established, their values may differ by an amount of 40%.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):232-239
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Generalized problem of virtual net synthesis for a machine-building enterprise
Koptev A.N., Dronov D.Y.
Abstract

We consider a formal method for the design of multi-service nets based on the «general image theory» method. That makes it possible to solve the problems of synthesizing a virtual net of an industrial complex.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):240-250
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Integral probability metrics for texture image analysis
Plastinin A.I.
Abstract

The paper is devoted to the development of kernels for texture images. We suggest using integral probability metrics as a similarity measure of texture images on which the kernels proposed are based. The kernels have been analysed using the method of discriminant analysis and the support vector method for test image sets.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):251-259
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Improving internet videostreaming quality using duplication of key frames
Sagatov E.S., Sukhov A.M.
Abstract

In this paper we investigate technological solutions to improve the quality of video streaming in wireless networks. Specially developed programs are investigated that allow duplicating the packets of video streams. We conducted tests of video streaming with the duplication of all frames, key frames only and without duplication. Experiments have shown that the best result is obtained by the technology with duplication packets containing only key frames. We have found the coefficients for the most popular codecs, which describe the dependence of video quality on packet loss and delay variation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):260-268
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Constructing the specification for the on-board realtime control algorithm
Tyugashev A.A., Bogatov A.Y.
Abstract

An approach to solving the problem of the on-board algorithm specification is proposed. This approach is founded on the calculus of a realtime control algorithm. The possibility of the automation of syntax reduction for the specification is also considered.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):269-275
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HUMANITIES
Coordination of process management mechanisms for design and technological planning of production at the level of staff members
Kirichenko A.S., Khaimovich I.N.
Abstract

The paper describes the automation of design and technological preparation of production, identifying problems and solving them. The resulting mathematical model eliminates the conflict between design and technological departments.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(2):276-281
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