Vol 9, No 4 (2010)

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING

Research of spatial motion of an uncontrolled spacecraft with the triharmonic moment characteristics around its center of mass during its reentry into atmosphere

Barinova Y.V., Timbay I.A.

Abstract

Spatial motion of an uncontrolled spacecraft around its center of mass is considered, the restoring aerodynamic moment of the spacecraft being described by an odd Fourier series in the angle of attack with the three first harmonics. Analytical formulas are deduced for the action integral along seperatrix, expressed, in terms of elliptic integrals of the first, second and third kind and of elementary functions. The moments of transition between various phase planes are determined. Formulas for determining the probability of capture into any region are deduced. The moments of additional equilibrium state appearing on the phase plane are determined. The analytical condition that determines the initial angular velocity ensuring the absence of additional equilibrium states ou the angle of attack in the given time interval is specified.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):11-19
pages 11-19 views

Deviation of reentry spacecraft from the estimated trajectory caused by transient modes of angular motion at the stage of entry into the atmosphere

Barinova Y.V., Timbay I.A.

Abstract

The motion of an uncontrolled spacecraft around its center of mass, the restoring aerodynamic moment of the spacecraft being described by an odd Fourier series in the angle of attack with the three first harmonics. The cases are investigated in which the character of motion changes during the reentry process: the rotational motion is transformed into the oscillatory one, and the oscillatory motion is transformed “by jumping” into the oscillatory motion with different amplitude characteristics. It is shown that transient modes of angular motion at the initial section of the trajectory may have essential influence on the movement of the centre of mass of the spacecraft and, as a result, cause deviation from the estimated trajectory.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):20-29
pages 20-29 views

Research of planar motion of spacecraft around its center of mass under the influence of the gravitational and the aerodynamic moments during its descent from circular orbits

Glukhova L.V., Timbay I.A.

Abstract

The paper deals with the planar motion of an uncontrolled axisymmetric spacecraft around its center of mass under the influence of the gravitational moment and the restoring aerodynamic moment. The restoring aerodynamic moment of the spacecraft is described by an odd Fourier series in the angle of attack with the two first harmonics. The evolution of phase trajectories is studied on the basis of analyzing the action integral. The evolution of the phase trajectories is caused by the descent of the spacecraft from a low circular orbit due to the atmospheric deceleration. The moments of transition between various areas of the phase plane are determined. For the cases of motion, when, intersecting the separatrix, the phase point may fall into various oscillation regions, the formulas for determining the possibility of capture into any region are found.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):30-37
pages 30-37 views

Development of turbopump unit design for hydrogen liquid-propellant rocket engines without generators developed at the design bureau of chemical automation

Dmitrenko A.I., Ivanov A.V., Rachuk V.S.

Abstract

The task of producing oxygen-hydrogen and oxygen-methane engines of the new generation designed without generators is urgent today. The turbopump unit is one of the main components of any engine. The paper is devoted to the development of turbopump unit design for engines without generators developed at the Design Bureau.

 

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):38-48
pages 38-48 views

Providing carrier rocket motion controllability on the basis of design smoothed wind profile application

Yendutkina Y.A., Titov B.A.

Abstract

An algorithm of smoothed wind profile calculating on the basis of the data of atmospheric sounding before the carrier rocket launch has been developed. A method of using design smoothed wind profile in the carrier rocket first stage ascent program for the purpose of providing the controllability under intensive wind perturbations.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):49-57
pages 49-57 views

Forming parts of the “atomizer” type for aircraft engines

Zvonov S.Y., Popov I.P., Mikheyev V.A.

Abstract

The paper presents the results of research conducted within the framework of the federal programme “Scientific and Pedagogical Specialists of the innovative Russia” for the years 2009-2013. The sequence of designing a part of the “atomizer” type of an aircraft engine is described. It is based on the theory of extrusion processes, in particular, drawing with forced thinning, as well as on simulation using the Deform 2D software.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):58-64
pages 58-64 views

Influence of the coupling and coherence coefficients in the pitch the flight dynamics of the system «small earth satellite-gurodampers»

Kurochkin I.S.

Abstract

The paper analyses flight dynamics on the basis of coupling and coherence between the parts of a complex dynamic system – small artificial Earth satellite – in the circular orbit using gyroscopic dampers arranged according to the “V-roll” scheme as dampers of their natural oscillations.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):65-68
pages 65-68 views

Dynamic loading and questions of assuring the reliability of functioning of superheavy launch vehicle cryogenic pressure-operated valves

Sazanov V.P.

Abstract

The paper presents the results of work aimed at assuring the required parameters of the reliability of functioning of a group of cryogenic units of the “Energiya” launch vehicle central block oxidizing system.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):69-73
pages 69-73 views

MECHANICAL ENGINEERING AND POWER ENGINEERING

Energy optimality criteria

Danilin A.I.

Abstract

The physical essence of the energy optimality criteria and their interrelation with the strength balance is shown from the common point of view. The dualism of the elastic potential constancy requirement is shown. A. A. Komarov’s proof of optimization algorithm convergence has been justified theoretically on the basis of energy optimality criteria. Problems arising in the practical realization of the theory are identified.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):74-79
pages 74-79 views

Parametric analysis of thermoacoustic travelling-wave engine operation with external heat application

Dovgyallo A.I., Zynovyev Y.A., Vorotnikov G.V.

Abstract

The paper presents parametric operation analysis of a regenerator incorporated into a thermoacoustic travelling-wave engine with external heat application. It focuses on the recommendations for defining the engine parameters in preproject design.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):80-87
pages 80-87 views

Variations in free cross-sectional areas of the phases of double-phase flows under changes of gaseous phase rate of flow

Levkin Y.S.

Abstract

The paper deals with variations in free cross-sectional areas of phases of double-phase flows under changes of their rate of flow. Two nomograms are presented which help to find free cross-sectional areas of both phases according to both rate-of-flow and velocity characteristics of double-phase flows.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):88-92
pages 88-92 views

Some features of nonlinear interaction of vibration modes of thin circular cylindrical shells

Taranukha N.A., Leyzerovich G.S.

Abstract

The paper deals with the problem on forced flexural vibrations of a thin infinitely long circular cylindrical shell (thin circular ring under plane deformation) with large amplitudes. The equations of ring motion are obtained from equations of the nonlinear theory of flexible shallow shells. A new approach to the construction of a nonlinear finite-dimensional model of a ring is proposed.

Three statements that make it possible to specify a series of fundamental notions of nonlinear flexural vibrations of circular cylindrical shells of finite length are formulated and proved.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):93-97
pages 93-97 views

Multi-scale complex failure analysis of aero engine compressor disks

Tumanov N.V., Porter A.M., Lavrentyeva M.A., Cherkasova S.A., Vorobyova N.A., Lyoshin D.P.

Abstract

Multi-scale complex failure analysis of aero engine compressor disks has been performed which includes microfractographic observations and 3D finite element crack analysis. Fracture origins and crack growth period have been determined. The analysis has been verified by the data of crack growth direct observations.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):98-112
pages 98-112 views

Experimental definition of the optimum scheme of shaping forged impellers by high-speed forging

Khaimovich A.I.

Abstract

Three schemes of high-speed forging of impellers are investigated. For the manufacturing of large-sized impellers with radial location of blades the scheme with application of concentrated (local) loading is recommended. The scheme possesses the following advantages: it decreases the deformation work; increases the nomenclature of details made with the existing equipment; increases die block wear resistance and the accuracy of the geometrical sizes of blades. The high speed metal flow at the final stage of forging improves the fill ability of radial channels of dies and accordingly raises the accuracy of blade shape.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):113-119
pages 113-119 views

Testing the blades of turbines of windmills and hydraulic motors, with the vertical axis of rotation

Khozyainov B.P., Kostin I.G.

Abstract

The paper deals with the results of testing blades of turbines with a vertical axis of rotation, namely the definition of their aerohydrodynamical characteristics. Four models of blades were tested: the first model of the blade represents a semi ellipse with a semicircumference inserted in a concave part of the semi ellipse without a stabilizing plane; the second model represents a semi ellipse with a semicircumference inserted in a concave part of the semi ellipse with a stabilizing plane the width of which is equal to of the diameter of the semicircumference; the 3rd model is a semi ellipse without a stabilizing plane; the 4th model is a semi ellipse with a stabilizing plane.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):120-124
pages 120-124 views

ELECTRONICS, MEASURING EQUIPMENT, RADIO ENGINEERING AND COMMUNICATION

Simulation of fluid contamination control process

Gareyev A.M.

Abstract

Principles of realization of proactive technologies of aircraft maintenance are reviewed in the article. The basic axioms of the task of controlling the hydraulic system condition by fluid parameters are formulated. A model of fluid contamination control is described.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):125-131
pages 125-131 views

Analysis of on-board equipment robustness on the basis of COTS-products

Yefanov V.N., Bondarev A.V.

Abstract

The paper deals with issues of analyzing the robustness of elements of civil-purpose electronic circuits for the design of on-board equipment of systems of armed forces in conditions of parametric uncertainty. A procedure for analyzing and constructing a mathematical model of a multi-port circuit is presented, an autonomous current invertor taken as an example.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):132-141
pages 132-141 views

Measurament of characteristics and spectral structure of laser plasma

Timchenko P.E., Marinin V.L.

Abstract

The results of mass-spectroscopic and X-ray spectrometry methods of diagnostics of laser plasma produced by the radiation of a laser with a controlled function of mutual coherence are presented. The comparison of these two methods shows that the X-ray spectrometry method yields the most reliable information and high speed of its processing.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):142-147
pages 142-147 views

CONTROL, COMPUTER SCIENCE AND INFORMATION SCIENCE

Design of led spotlight secondary optics producing required irradiance distribution

Belousov A.A., Moiseev M.A.

Abstract

A method for design of refractive optical element producing the prescribed irradiance distribution with large angular dimensions from extended light source is presented. The method is based on the gradient optimization of the refractive surface represented as a bicubic spline in spherical coordinates. The secondary LED optic that produce uniform irradiance distribution in the rectangular region extended light source is computed. The energy efficiency of the optical elements is more than 75 %; the non-uniformity of the generated irradiance distribution is less than 10 %.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):148-158
pages 148-158 views

Solving diffractive optics problems using graphics processing units

Golovashkin D.L., Kazanskiy N.L.

Abstract

Techniques for applying graphics processing units (GPU) to the general-purpose non-graphics computations proposed in recent years by the companies ATI (AMD FireStream, 2006) and NVIDIA (CUDA: Compute Unified Device Architecture, 2007) have given an impetus to developing algorithms and software packages for solving problems of diffractive optics with the aid of the GPU.

The computations based on the wide-spread Ray Tracing method were among the first to be implemented using the GPU. The method attracted the attention of the CUDA technology architects, who proposed its GPU-based implementation at the conference NVISION08 (2008). The potential of this direction is associated both with the research into the general issues of mapping of the Ray Tracing method onto the GPU architecture (involving the use of various grid domains and trees) and with developing dedicated software packages (RTE and Linzik projects).

In this work, a special attention is given to the overview of techniques for the GPU-aided implementation of the FDTD (finite-difference time-domain) method, which offers an instrument for solving problems of micro- and nano-optics using the rigorous electromagnetic theory. The review of the related papers ranges from the initial research (based on the use of textures) to the complete software solutions (like FDTD Software and FastFDTD).

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):159-168
pages 159-168 views

Implementation of FDTD-method by means of CUDA-technology

Golovashkin D.L., Malysheva S.A.

Abstract

This paper deals with the implementation of the vector FDTD-method for solving of combined Maxwell’s equations on GPU. The implementation of the algorithm for two-dimensional problem on graphics processor NVIDIA GeForce GT 240 using CUDA-technology demonstrates computational speedup in 42.9 times as against with computations has been made on central processor  Intel Core Duo E6500. The future prospects of mesh domain decomposition application are considered in this article for the implementation of the vector FDTD-method on GPU.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):169-183
pages 169-183 views

Astigmatic transformation of Airy matched distributions

Zoteeva O.V., Khonina S.N.

Abstract

The methods of generation of distributions with vortical phase singularity are considered. Especially such topics were attended as using of the fractional Fourier transformation and transformation of Airy similar distributions.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):184-192
pages 184-192 views

Analysis of methods for rapid assessment of surface cleanliness

Ivliev N.A., Kolpakov V.A., Krichevsky S.V.

Abstract

In this paper analyzes the main methods for rapid assessment of surface cleanliness of dielectric substrates. Shown that the most convenient for the rapid assessment of surface cleanliness is a device based on the method by measuring tribometer sliding friction coefficient. The device is characterized by easy-to-use design, the short duration of the measurement process and, as will be shown below, does not require for their calibration of the reference surfaces and clean the surface of the indenter probe-specific technologies.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):193-201
pages 193-201 views

Generation and analysis of light modes using multi-order does matched with the laser modes and the zernike functions

Karpeev S.V., Khonina S.N.

Abstract

Using test light fields, we simulate the performance of an optical setup containing multi-order DOEs matched with the Zernike functions. The system tolerance to variations of the experiment conditions from the ideal is studied. A qualitative comparison of the simulation results and a natural experiment is made.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):202-214
pages 202-214 views

High-aperture binary bi-axicon for far ir light: fabrication and experimental testing using linearly polarized incident light

Karpeev S.V., Khonina S.N., Volkov A.V., Moiseev O.Y., Kostyuk G.F., Yakunenkova D.M.

Abstract

When illuminated by a linearly polarized light, a high-aperture binary bi-axicon allows one to redistribute the axial contribution of different electric vector components, ensuring a maximal value of the longitudinal component and a minimal value of the transverse component on the optical axis. Such an asymmetric axicon for the wavelength 10.6 µm is fabricated on a silicon substrate using a lithography technique with plasma-chemical etching. Off-axis diffraction patterns were obtained experimentally through diaphragm-aided scanning of the focal plane.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):215-223
pages 215-223 views

Model for the estimation of design work acceleration by parallelization of iterative process in research-intensive mechanical engineering

Komarov V.A., Kremenetskaya M.Y., Sologub A.V., Filatov A.N.

Abstract

A model for the estimation of design work acceleration by parallelization taking into account coordination and iteration costs is proposed. Different approaches for top-down design and their impact on work acceleration are considered. Ways of using the model for the optimization of design management and company structure are shown.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):224-231
pages 224-231 views

Formation of the light field for linear movement of a microobject

Morozov A.

Abstract

The calculation of the DOE, which forms an image of the strip with a directional phase gradient along it, based on optical vortex is considered. It is shown, that the increase of the singularity of the optical vortex increases the length of the strip, but decreases it’s effectiveness. The schemes and the results of experiments on the formation of images, as well as trapping and manipulating particles computed in progress and manufactured on the glass DOE, are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):232-237
pages 232-237 views

Iterative algorithm for calculation of the non-diffractive images using of the narrow spectral ring

Mukhametgaleev I.V., Khonina S.N.

Abstract

The iterative algorithm of calculation of the complex distribution propagating in free space with preservation of structure and being approximation of a given image is considered. The algorithm is based on that fact, that all non-diffractive distributions have the spatial spectrum concentrated in narrow ring area.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):238-246
pages 238-246 views

Comparing of modeling methods of X-RAY radiation propagation in paraxial area

Nalimov A.G., Khonina S.N.

Abstract

The results of calculation of different modeling methods of radiation propagation calculation after a zone plate made of a Cu and Si are shown in the article. The modeling methods are one-dimension Fresnel transformation, one-dimension non-paraxial propagation method (angle spectrum of flat waves), two-dimension integral of Rayleigh-Zommerfeld, RSoft BeamProp software (RSoft design froup, USA). It is shown, that all four methods give results close each other in the focal plane.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):247-256
pages 247-256 views

Reduction of the focal spot size in high-aperture focusing systems at inserting of aberrations

Pelevina E.A., Khonina S.N.

Abstract

Possibility of control by the contribution of components of vector electric field in focal area by means of transmission functions similar to the wavefront aberration for the purpose of reduction of the cross-section size of the central light spot of focusing system with the high numerical aperture is shown. By analysis of a matrix of polarizing transformation of a high-aperture lens and numerical modeling of focusing system in Debay approach the possibility of reducing the size of the focal spot and shadow area is proved. Efficiency of use Zernike polynomials for formation of a subwavelength central spot is shown: elongate focal spot having full width at half maximum along polarization axis FWHM(-)=0.24λ is obtained for linearly polarized beam; round focal spot having full width at half maximum FWHM=0.32λ is obtained for radially polarized beam and FWHM=0.35λ for circularly polarized beam. For the azimuthal polarization the presence of the first order vortex phase function enables us to obtain the central circular spot in the total intensity. The spot is smaller than the diffraction limit: FWHM=0.46λ and the intensity in the sidelobes is low.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):257-268
pages 257-268 views

Diffractive optical elements for automatic optical assembly microsystems

Porfir'ev A.P.

Abstract

We discuss results of calculation  focusing diffractive optical elements (DOEs). This elements generate light  beams that have predetermined amplitude-phase distribution which can be used for assemblage of microsystems. Also results of experiments on formation of such light fields by means of the binary spatial modulator are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):269-278
pages 269-278 views

Problems of mathematical programming in optimization of controlling air transportation on the basis of a hub airport

Potapov I.V., Romanenko V.A.

Abstract

The paper deals with the solution of a set of problems of optimum air transportation control on the basis of hub airports by reducing them to a partially integer problem of linear programming of significant dimension. Three mathematical models of transfer transportation systems are presented, with various degrees of elaboration, and the results of their comparative analysis for modeling examples obtained by using the IBM ILOG OPL environment are given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):279-289
pages 279-289 views

Improvement of the resolution on the basis of use of spatial filters

Savelyev D.A., Khonina S.N.

Abstract

Researches on resolution improvement at use of a spatial filtration are given. Spatial filters such as Toraldo, the vortex phase plate, the shadow filter are used. Also for reduction of a spot of confusion it is used conical axicon. Results of experiments are given at use of the above-named filters. Efficiency of a spatial filtration for resolution improvement is shown.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):290-298
pages 290-298 views

Airy-like two-dimensional distributions

Khonina S.N.

Abstract

Fourier transformation from the phase functions depending on a cubic degree of arguments for formation of two-dimensional Airy-like distributions is considered. At use of phase function with cubic dependence on radius the focusing of illumination beam into a set of local focuses is observed. Between that local focuses the weak light spot of the subwavelength size can be formed.

Vortical Airy beam which radial component is expressed through truncated on n-th root or extremum of Airy function are considered. Such beams propagating in free space keep the expressed ring structure, however the radii of rings are varied with a distance. Astigmatic transformation of 2D mirror Airy beams with indexes (n, m) allows to receive the pseudo-ring structures possessing the orbital angular moment.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2010;9(4):299-311
pages 299-311 views

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