Vol 8, No 1 (2009)

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING
Experiments aboard the space vehicle “Photon-M” NO.3 and some reseelts of the mission
Abrashkin V.I., Shatokhin S.M., Kovalyova T.B., Safronov S.L.
Abstract
The paper deals with scientific experiments carried out aboard the space vehicle “Photon-M” No. 3 in the framework of the flight, September 14 through 26, 2007. The make up and bulk of devices and experimental installations used as well as the first results of experimental data processing are described.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):9-13
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Analysis of transverse force in the case of flow about bodies of revolution at high angle of attack
Gumerov A.V., Gumerova L.V., Balzannikova Y.M.
Abstract

The paper analyses cross separation flow about an impulsively started circular cylinder in a non-viscous non-compressible medium by the vortex method. The impact of viscosity on resistance is expressed through the circulation of vortices formed behind the cylinder. By analogy the computation of plane flow is reduced to the computation of transverse force when a body of revolution moves at an angle of attack.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):14-23
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Simulation of automatic systems of controlling space vehicle drives
Zhuravlyova Y.V.
Abstract

The paper discusses the main stage of creating a simulation model by the example of a piston pneumatic drive with an air distribution device “jet tube”.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):24-29
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Command control of hypersonic aircraft angle of attack during acceleration and climb
Kotchyan A.G.
Abstract

The paper deals with the tasks of forming command control of hypersonic aircraft: the main aircraft and the accelerator aircraft during acceleration and climb. The motion is analysed in conditions of atmospheric density perturbations and deviations of aircraft aerodynamic characteristics. An algorithm of single-channel (by the angle of attack) direction is proposed and its ability to compensate the impact of perturbations on satisfying the final conditions of motion is investigated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):30-40
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Problems of making auxiliary gas turbine engines with gas bearing rotors
Ponomaryov B.A., Gavrilov V.V.
Abstract
The paper deals with the topical issue in the area of developing and producing gas turbine engines on gas bearings. The use of non-conventional types of bearings – gasodynamic ones – in gas turbine engines is of practical interest as it will make it possible to give up oil systems completely and to create a “dry” engine in future. This will considerably simplify the engine structure, improve its mass-dimension parameters, increase the reliability and reduce the cost of producing and maintenance.
Analysis of the state and level of the above-mentioned technologies in Russian Federation and abroad is given. Examples of high-temperature turbomachines produced (supercharging turbine-driven set, gas turbine engines, miniturbojet engines) using gas bearings are given.
The paper presents the results of designing and investigations carried out at the Central Institute of Aircraft Engine Design, of a model rotor using gas bearings for a small-size auxiliary gas turbine engine (equivalent capacity 50 kWt) developed at the joint-stock company “Aerosila” jointly with the Central Institute of Aircraft Engine Design.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):41-55
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Determining flow regimes around rocket boosters on a part of the launch orbit
Kharitonova A.N.
Abstract

Two actual launch paths are chosen as an example to consider the main regimes of flow around rocket boosters with oversized head caps, special attention being paid to regimes of high-altitude flying. Reynolds and Mach numbers varying with altitude are calculated on the basis of parameters of these paths (time, velocity and altitude). Then, taking into account the Tsyan diagram showing the separation into the principal flow areas, flow regimes of carrier rockets are determined, in particular, the transition from the standard gas dynamics area to the slip flow area.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):56-60
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Analysis of loading characteristics of “Soyuz-ST” carrier rocket modules in places of their support during sea transportation
Shirokov S.V.
Abstract

The paper describes sea transportation of carrier rocket modules. A mathematical model is proposed which describes the dependence of loads in places of carrier rocket module support on vertical shifts of the vessel. The main characteristics of sea choppiness are given, regularities describing vertical shifts of a point of the vessel during sea choppiness are defined as a random process.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):61-68
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Approbation of the numerical model of account of viscosity impact on the flow in low-thrust rocket engine nozzles in the approximation of a laminar boundary layer with sliding
Shustov S.A.
Abstract

The paper outlines the results of approbation of the numerical model developed in [1] of the account of viscosity impact on the flow in low-thrust rocket engine nozzles in the approximation of a laminar boundary layer with sliding by comparing the results of calculations according to the model both with the experimental results and with the results of calculations using a model of a higher level (shortened Navier-Stokes equations in the approximation of a narrow channel).

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):69-78
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Numerical model of viscosity impact on flow in low-thrust rocket engine nozzles in the approximation of a laminar boundary layer with velocity slip
Shustov S.A.
Abstract

The paper describes a numerical model of viscosity impact on flow in low-thrust rocket engine nozzles developed at the research centre of space power of Samara State Aerospace University. The accepted assumptions of the physical model used are outlined. The mathematical model is described in the form of equations in partial derivatives which express the laws of conservation of mass, momentum and energy as applied to the flow in the laminar boundary layer of low-thrust rocket engine nozzles with the negative longitudinal pressure gradient under boundary conditions of velocity slip and temperature jump on the nozzle wall. The developed algorithm of solving the equations of the mathematical model numerically is outlined, which provides the stability and the pre-set accuracy of calculation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):79-89
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Experimental analysis of flow separation in low thrust rocket engine nozzles with a profiled supersonic part of the nozzle
Shustov S.A.
Abstract

The paper outlines the procedure of experimental analysis of flow separation in low-thrust rocket engine (LTRE) nozzles with a profiled supersonic part. The procedure was developed under the author’s supervision at the research centre of space power engineering of SSAU. The results obtained on the basis of the procedure are presented, which show significant peculiarities of separation parameters in LTRE nozzles. These are connected, mostly, with the change in the nature of the flow in the boundary layer from laminar to turbulent due to the shock wave that causes flow separation. Limitations of the existing design procedures for flow separation in rocket engine nozzles as applied to LTRE are revealed. It is shown experimentally that the nature of the flow in the boundary layer of the supersonic part of the nozzle of a standard 400 H thrust liquid-propellant rocket engine is laminar.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):90-99
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MECHANICAL ENGINEERING AND POWER ENGINEERING
Identification and procedure of reducing periodic noise of internal combustion car engines using the active compensation method
Vasilyev A.V., Andreyev S.S., Butsayev I.V., Pimkin V.V.
Abstract

Problems of using systems of active compensation of noise in internal combustion car engines are discussed. The procedure and the results of internal combustion engine noise spectrum analysis are given.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):100-106
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Criteria of discrete phase control of blade working condition and their feasibility in systems of turbine driven set automatic control
Danilin A.I., Tchernyavsky A.Z.
Abstract

The paper presents a brief survey of diagnosis methods and means for the control of working condition of turbomachine blades. Information criteria of detecting the faulty state of turbomachine blades, in case of using a peripheral sensor only, are defined and justified. The results of computer modeling are presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):107-115
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Taking account of stress concentration degree when forecasting the fatigue strength of strengthened part
Kirpitchyov V.A.
Abstract

It is established that the coefficient of residual stress influence on the endurance limit decreases as the stress concentration degree increases.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):116-122
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Forecasting the endurance limit of shot-strengthened parts with a concentrator by residual stresses of a control specimen
Kirpitchyov V.A., Vakulyuk V.S.
Abstract

Additional stresses after making a semicircular cut are calculated for a smooth cylindrical part with a hole in it for the case of advance surface plastic strain. It is found that, residual stresses of a smooth part being the same, additional stresses in the least section are equal to those of a solid part whose cross-section is equal to the double wall thickness.
It is established that residual stresses in strengthened parts with concentrators can be determined by the residual stresses of control specimens processed simultaneously with the parts.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):123-126
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Increasing the reliability of aircraft components by regulating technological residual stress
Kirpitchyov V.A., Vakulyuk V.S., Tchirkov A.V.
Abstract

The paper shows the possibility of forecasting residual stressed state of component surface layer after strengthening and the optimization of strengthening effect. Methods of defining residual stress are developed and a theory of its influence on fatigue strength is proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):127-133
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Peculiarities of electrohydraulic servo drive correction
Mesropyan A.V.
Abstract

The paper deals with some peculiarities of applying hydromechanical correction in electrohydraulic servo hydrodrives. A classification of correction devices on the hydromechanical element basis is given, the influence of additional correction feedback on the performance of the hydraulic drive is shown. A variant of a mathematical model of a servo drive with a combined hydromechanical correction device is presented.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):134-144
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ELECTRONICS, MEASURING EQUIPMENT, RADIO ENGINEERING AND COMMUNICATION
Laser optico-acoustical octane meter in systems of optimizing the process of commercial petrol compound-filling
Astapov V.N.
Abstract

The paper presents a methodology of constructing systems of optimal commercial petrol compound-filling. A mathematical model of the “octane number” and a method of identification of the octane numbers of the components being mixed using a laser optico-acoustical octane meter are given. For this purpose the inverse problem of petroleum mixture analysis using a genetic algorithm is solved.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):145-153
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CONTROL, COMPUTER SCIENCE AND INFORMATION SCIENCE
Recurrent matrix form of the optimal elimination method
Zhdanov A.I., Yablokova L.V.
Abstract

The paper deals with the direct recurrent method [1] which is an alternative formulation of the direct projection method of solving systems of linear algebraic equations. The direct recurrent method is shown to be equivalent to the method of optimal elimination, which makes it possible to treat the latter as the direct recurrent method. This approach provides the potential for creating machine algorithms of solving systems of linear algebraic equations with many right sides, especially efficient in iteration refinement algorithms. The algorithms created have an optimal volume of on-line storage.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):154-160
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Method of improving control using a simulation object model and its application to the problem of helicopter emergency landing manoeuvre optimization
Kvokov V.N., Trushkova Y.A., Ukhin M.Y.
Abstract

The paper presents an iterative algorithm of improving control for dynamic systems based on object approximation on average at each iteration in the vicinity of the path being improved by linear-quadratic structures. The algorithm can be applied directly to simulation models of dynamic systems that have no complete analytical description, and it form a part of the method of optimizing control using such models. The efficiency of the method is illustrated by the example of helicopter emergency landing.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):161-170
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Comparative analysis of different approaches to designing thin-walled element structures of composite materials
Komarov V.A., Tchernyaev A.V.
Abstract

The paper deals with three approaches to designing thin-walled element structures of composite materials on the basis of quaisiisotropy, equistrength and optimality criteria. A comparative analysis of the results of designing on the basis of these criteria has been performed which made it possible to determine areas of their application. Problems of designing with regard to torsion rigidity demands are also dealt with.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):171-179
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Designing a system of automatic data transfer between Unigraphics NX4 and Catia V5 systems saving the construction tree
Nikolayev A.V., Maximova O.I., Tchernikov M.S., Zaikin M.A.
Abstract
The paper discusses the main disadvantages of the existing methods of geometric information exchange between computer design systems. A new method of data transfer between CAD-systems is proposed which is based on the use of ontological data model stored in the unification file.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):180-187
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Computer design of the gear cutting process using gear hob cutters
Polyanskov Y.V., Gismetulin A.R., Nikolayev A.V., Gribovskaya K.V.
Abstract

The paper is devoted to a new method of developing the process of obtaining gear wheels using models obtained in the CAD-systems. Three 3-D models are used in order to develop the process: the 3-D model of the basic worm, the machining process model and the resulting 3-D model of the gear wheel.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):188-196
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HUMANITIES
Reputation of enterprises competing in the market from the point of view of consumers
Ivanov D.Y., Kirilina Y.V.
Abstract

The paper deals with the competitiveness of industrial enterprises by such a qualitative index as their reputation from the point of view of consumers. A model is also discussed which describes the target function of the enterprise that invests in its reputation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):197-200
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“Security”, “threat to security”, “emergency”: some problems of relationship between the concepts
Pyatiletov V.V.
Abstract
The paper deals with issues related to terminological aspects of preparing legislative documents in the area of national security and prevention of emergencies.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2009;8(1):201-206
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