Vol 10, No 3-1 (2011): Special Issue

Full Issue

AIRCRAFT AND SPACE ROCKET ENGINEERING
About the probes for measuring pulsations of pressure in the flowing part gas turbine engines
Shorin V.P., Gimadiev A.G., Bystrov N.D., Ilinskij S.A.
Abstract

Evaluation of the stability of GTE compressor is provided in the measurement of pressure fluctuations in the frequency range from several Hz to several kHz. Because the sensors of the pressure fluctuations can not be located at the measurement points due to excessive heat, vibration and limited space for their installation used the lead-in channels - acoustic probes. Proposed science-based methodology for calculating the frequency characteristics of the probes with corrective elements on which the developed software tools to select their parameters. The developed software can process the information derived using acoustic probes during engine tests. To verify the validity of computational models of probes at the Department of SNPP SGAU established test facilities and measurement and registration set in place to test their frequency.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):11-15
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Methodical features of vibration tests of rotating blades using dynamic spin rigs
Nozhnitsky Y.A., Fedina Y.A., Shadrin D.V.
Abstract

Methodical features of investigations of rotating blades vibration characteristics and high cycle fatigue using dynamic spin rigs are discussed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):16-22
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Strain-energy approach and low-cycle fatigue of materials
Kotcherov E.P., Bukhanko A.A., Khromov A.I.
Abstract

Low-cycle fatigue is well researched in terms of uniaxial test experiments of plane and cylindrical specimens. At the same time material particles can be deformed at product operation under laws that differ from uniaxial test. It requires the definition of conditions of plasticity and limiting state for spatial deformation processes. This definition should consider singularities of low-cycle fatigue process: Bauschinger effect; estimations of material fault probability in a work of internal force. With this design the approach to construction of new plasticity condition is formulated and theoretically proved as loading surface which connected with level lines of surface of state of strain of incompressible rigid-plastic body. Use of tensors of finite strain as a measure of strain and description of Bauschinger effect with help of these tensors is main difference of suggested approach.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):23-27
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The combined fuel draining control system for liquid oxygen and liquid hydrogen upper stage
Ivanov V.P., Partola I.S.
Abstract

A totally new fuel draining control system for cryogenic upper stage is discussed at the article. The system function is tank fuel remains minimization. The task solution is provided by fuel components drain levels ratio changing. A using of information about fuel level in tanks from discrete sensors provides the parry infelicities of tank filling, fuel components consumption velocity measurement and the engine control devices. A mathematic simulation confirmed the system efficiency.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):28-34
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The influence of burner design on the characteristics of the combustion chamber with gaseous fuels
Markushin A.N., Baklanov A.V., Tsyganov N.E.
Abstract

Examines the influence of burner design, the main characteristics of the combustion chamber. These activities were carried out in order to improve the environmental performance of gas turbines, which significantly reduce toxic emissions in comparison with the serial main combustor

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):35-38
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Hard & soft complex for “Angara” family launch vehicles engine system development
Partola I.S.
Abstract

A consist and development method for hard & soft complex for “Angara” launch vehicles engine systems are discussed at this article. It’s proved that utilization of mathematic simulation and constructive similar devices test results allow to cut essentially qualification tests capacity. Results of LV “Angara-A5” universal rocket module №2 engine system “cold” and fire tests are discussed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):39-46
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3D modeling of blade flutter in modern gas turbine engines
Vedeneev V.V., Kolotnikov M.E., Makarov P.V., Firsanov V.V.
Abstract

Flutter of jet engine compressor blades is modeled using a new approach based on energy method. Flutter calculations of 1st and 2nd compressor stages are conducted for different engine regimes and different boundary conditions at mid-span shroud. Results are verified by experimental data. This method can be applied for blade flutter modeling and suppression of novel engine designs.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):47-56
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Calculation of cutting temperature at milling of purveyances from hard-processing materials
Trusov V.N., Skuratov D.L., Zakonov O.I., Shikin V.V.
Abstract

The analysis of thermal processes is conducted in the area of cutting at milling of eventual elements a method, the pictures of distributing of thermal streams and value of temperature of the treated surface are got, for different materials.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):57-62
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Increase of working capacity of taps at нарезании carvings in deaf apertures with imposing of the compelled ultrasonic fluctuations
Golovkin V.V., Druzhinina M.V., Trusov V.N.
Abstract

In article the analysis of features of process of cutting of female threads by a tap in deaf apertures is carried out. On the basis of the given analysis researches of influence of the compelled ultrasonic fluctuations on a twisting moment, arising in the initial moment of an exit of a tap from an aperture are conducted. It is established that in case of processing with ultrasonic fluctuations of Mkr at an exit of a tap it is much less, than at usual cutting of a carving. By results of the done researches the way нарезания carvings with the ultrasound is offered, allowing to raise working capacity.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):63-67
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Guaranteeing of ecological and economic indicators of internal combustion engine
Grabovskiy A.A., Mironov V.A.
Abstract

The analysis of the factors defining value of ecological and economic indicators of internal combustion engines is presented. The technical decisions directed on achievement of demanded indicators of quality of functioning as that discrete change of capacity of the internal combustion engine, allowing approximately in 2-3 times to lower quantity of harmful emissions, with simultaneous improvement of economic indicators.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):68-74
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Progressive thermodynamic cycle of internal combustion engine based on сrank a rod the mechanism with dual kinematic communications
Grabovskiy A.A.
Abstract

The analysis of the factors defining value of ecological and economic indicators of internal combustion engines is presented. The technical decisions directed on achievement of demanded indicators of quality of functioning, as that an internal combustion engine on a basis сrank a rod the mechanism with the dual kinematic communications, possessing the improved ecological characteristics, in high mechanical efficiency, and also in the improved kinematic and dynamic parameters based on realization of a progressive thermodynamic cycle with high degree of expansion and with «internal cooling» are offered.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):75-82
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Requirements to quality superficial lauer of details GTE
Petukhov A.N.
Abstract

Modern requirements to used in GTE to constructional materials and feature of realization in details GTE of the service properties incorporated in constructional materials are considered. It is shown that prevalence of destructions of details for high-cycle fatigue (FCH). It is connected with variety of factors (constructive, technological , exploitation etc.). Influencing resistance of fatigue strength and complexity of forecasting of dangerous amplitudes of variable pressure.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):83-91
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Creation of the technique of he delivery influence on working process in the LRE chamber with expulsion propellant supply
Shnyakin V.N., Kovalenko A.N., Kovalenko V.N., Rod'kin A.V., Bochev E.N., Makoter A.P., Blishun Y.V.
Abstract
For the effective analysis of the LRE with expulsion propellant supply bench and flight tests results, the gasliquid mixture flow in engine pipelines estimation technique should be used. For this purpose, static and dynamic pressures, vibration accelerations in distinguished points of pipelines at water flow tests on special experimental installation have been analyzed. Observations by a high-speed videocamera were used as a "reference" method.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):92-101
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Two-dimentional axial rotor compressor off-design performance prediction model with the use of simulation methods and tools
Mikhailova A.B., Akhmedzyanov D.A., Akhmetov Y.M., Mikhailov A.Y.
Abstract

The method of solving the two-dimensional direct problem for axial compressor is developed and realized in the simulation system COMPRESSOR_2D. The study on adequacy of proposed all-inclusive criterion for surge zones emergence prediction is executed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):102-108
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Generation of control programes for disposable unmanned aircraft vehicle propulsion system by means of dynamic characteristic
Mikhailov A.Y., Akhmedzyanov D.A., Akhmetov Y.M., Mikhailova A.B.
Abstract

Disposable unmanned aircraft vehicle propulsion system features are discussed. The dynamic characteristic is proposed to generate control program for disposable unmanned aircraft vehicle propulsion system. The simulation system Dvigwp is used to calculate dynamic characteristic of turbojet engine. The control program, which provides minimal time of transient process is generated by means of calculated dynamic characteristic.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):109-117
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A device for diamond smoothing of holes with a centrifugal-force-loaded smoothing tool
Shvetsov A.N., Skuratov D.L., Abulkhanov S.R.
Abstract

Technological capabilities of a process of diamond smoothing of component surfaces are discussed. The design of a device for diamond smoothing of holes with use of the centrifugal force to load the smoothing tool is proposed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):118-122
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Numerical study of gasdynamic characteristics counterflow burner with use of anisotropic models of turbulence
Piralishvily S.A., Guryanov A.I., Badernikov A.V.
Abstract

Results of numerical simulation of viscous compressible gas in counterflow burner unit, taking into account characteristic features of flow in bounded swirling flow diaphragm walls. The calculations are performed using models of turbulence: SST, ke, RNG ke, EARSM, RSM BSL. It is shown that in the case of the Reynolds stress transport model structure of the flow has the features do not appear when using the standard two-parameter models of turbulence, but observed during the experiments.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):123-130
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Definition of overall limits internal-combustion engine using vector modeling
Kosenok B.B.
Abstract

The description of the method of vector modular models, made the rationale for modeling restricted dimensions given vector model, which describes the task. This study substantiates the increasing use of modular vector models beyond the analysis and synthesis of linkage and shows the advantages of this approach.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):131-134
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Prospects for the forcing of gas turbine and steam power plants
Pavlova A.A.
Abstract

In this article, using of heat recovery technology for improving the efficiency of power plants and compressor station is scientific and technically justified. In addition, the technical and economical feasibility of the proposed methods based on the thermodynamic and gas-dynamic calculations of existing gas turbines and combined-cycle plant is traced, considering the introduction of the investigated methods of improving efficiency.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):135-142
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Numerical investigation multifuel combustion gas turbine combustion chamber module
Malygina M.V.
Abstract

There are presented the results of multifunctional combustion modules operation process investigation that forms primary combustion zone in gas turbines combustion chambers. There are found air mass flows ratios through contours of the swirling flows that provide air-fluel ratio distribution required in volume of premixing zone. It is defined angle air swirling flow that allows to reach a compromise4 between a values of hudravlic losses and a volume of paraxial zone ot reverse flows that determine flame stabilization conditions in case of “lean” combustion (α>1,5).

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):143-150
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Experimental investigation of turbulence of influence of the compressor’s out flow parameters on the hydraulics parameters resistance of separation diffuser of combustion chamber
Guryanova M.M.
Abstract

It is presented the results of investigation of combustion chamber’s gasdynamics. It’s obtained criteria equations to perform an optimization of its parameters relatively to minimal hydraulically losses on the stage of diffusion’s designing.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):151-159
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Improving the quality parameters of serial debug two spool mixed flow turbofan
Volik A.A., Gumerov K.S., Khabibullin R.Z., Khayrullin R.B.
Abstract

The technique of optimal debug engines to stage the acceptance tests. Investigate the change of the basic parameters of the engine when changing atmospheric conditions. The study is based on data received in mass production.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):160-167
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Numerical investigetion of a non-contacting finger seal
Temis Y.M., Selivanov A.V., Dzeva I.Y.
Abstract

Investigation multi-fields method is developed for estimation of finger seal performance. This method is comprised gas flow simulation and stress-deformed analysis. Mathematical models have different level of refinement and can be used both for fast optimizations and full analysis of the finger seal.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):168-173
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Rotor in gas bearings dynamics experiment-calculated investigation
Temis Y.M., Temis M.Y., Egorov A.M., Gavrilov V.V., Ogorodov V.N.
Abstract

Mathematical model of rotor dynamics and test rig with rotor in gas bearings are developed for developing of experiment calculated model of high-speed rotor in gas bearings. Rotor mathematical model includes shaft model and nonlinear support with gasdynamic foil bearing model considering four body contact: shaft-gas film-foils-bearing race. Test rig with rotor in gas bearing for verification of numerical simulation results and for adjustment of small gas turbine units (GTU) shafting performance are developed. First stage of numerical simulations and experimental research are done for investigation of simulator rotor rotation in gas supports. Rotor orbits in supports are received for numerical model and experimental investigation and their comparative spectrum analysis are carried out.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):174-182
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GTE parts optimal design
Temis Y.M., Yakushev D.A.
Abstract

Modern concepts of using optimization technologies for structural design are considered. Several approaches of optimization problems for fan and compressor stages elements are considered. The problem of blade and disk optimization and the problem of total stresses minimization under certain constraints are investigated. All results were obtained using developed FE analysis program connected with SQP optimization procedure.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):183-188
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Advanced technologies, properties and application of electrochemical nanostructured coverings
Nenashev M.V., Ibatullin I.D., Ganigin S.J., Galljamov A.R., Neyaglova R.R.
Abstract

In article new technologies of drawing the nanostructured electrochemical coverings, including chrome-diamond and silved-diamond coverings are described. Results of research mechanical and tribotechnical properties of coverings are resulted and areas of their application are shown.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):189-196
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Perspective technologies, properties and application of detonation coverings
Nenashev M.V., Ganigin S.J., Zhuravlev A.N., Dyakonov A.S., Belokorovkin S.A., Karyakin D.Y.
Abstract

New directions in the field of a detonation dusting of firm wearproof coverings are described. Results of research mechanical and tribotechnical properties nanostructured composite ceramic-metal coverings are resulted. The scope of detonation coverings in the industry is shown in the article.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):197-203
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Application of detonation coverings for creation of new metalcutting tool
Nenashev M.V., Ibatullin I.D., Utjankin A.V., Zhuravlev A.N., Usachyov V.V., Karjakin D.J., Dyakonov A.S.
Abstract
The results of workings out and researches of the new metalcutting tool for turning and drilling processing of the constructional materials, received with application of detonation technologies are resulted in the article.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):204-210
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Devices and methods of research of quality of surfaces
Shashkina T.A., Utjankin A.V., Galljamov A.R., Dyakonov A.S.
Abstract

In article results of working out of a universal programme-hardware complex for research mechanical, geometrical and tribotechnical properties of surfaces of samples of materials and details of machines are resulted.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):211-217
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The machine and methods of tribotehnical tests of materials
Ibatullin I.D., Zhuravlev A.N., Utjankin A.V., Galljamov A.R., Neyaglova R.R.
Abstract
In article results of working out universal automated tribometer with computer system of the data gathering are resulted, allowing to spend various kinds tribotechnical tests constructional and lubricants and the coverings used in knots of a friction of cars. Express techniques of tests tribomaterials are described.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):218-223
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Effect of radial location of nozzles on width on performance of pre-swirl systems
Didenko R.A., Karelin D.V., Ievlev D.G., Lebedev V.V.
Abstract

This paper investigates the effect of radial location of the inlet nozzles on effectiveness Θ and total pressure losses ζ of pre-swirl systems. A commercial code Ansys CFX is used to solve the Reynolds Averaged Navier Stokes (RANS) equations using SST turbulence model with wall functions approach. Computations are performed for the flow parameter 0.375 < < 0.75 Т λ , rotational Reynolds number 1.69⋅107 < ReФ < 2.33⋅107 , throughflow Reynolds number or non-dimensional mass flow rate 2.79⋅107 < Cw < 5.73⋅107 and swirl ratio 0.548 < β < 2.5 . The principles of the most appropriate radius were developed. Also the problem of heat exchanger was discussed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):224-232
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Effect of cavity width on performance of pre-swirl systems
Didenko R.A., Karelin D.V., Ievlev D.G., Lebedev V.V., Belousova E.V.
Abstract

This paper investigates the effect of cavity width on effectiveness Θ and total pressure losses ζ of pre-swirl systems. Computations are performed for the flow parameter 0.375 <λТ < 0.75 , rotational Reynolds number1.69⋅107 < ReФ < 2.33⋅107, throughflow Reynolds number or non-dimensional mass flow rate 2.79 ⋅105 < Cw < 5.73 ⋅105 and swirl ratio 0.548 < β < 2.5 . No influence on Θ and ζ is found by changing the cavity width.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):233-240
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Vortex effect and intensification of heat and mass transfer in cell energy technology
Piralishvily S.A., Veretennikov S.V.
Abstract

The results of numerical and experimental study of heat transfer and gas dynamics in the vortex energy separator were presented. Examples of the cooled nozzle blades with built-in vortex tube.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):241-247
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Studying the influence of the gas-dynamic non-stationary factors on the mathematical modelling of the gas turbine engines nonsetup work modes
Kofman V.M.
Abstract

With the help of the GTE (Gas turbine engine) calculation mathematical models of the non-setup work modes in the quasistationary setting and considering the gas dynamic non-stationary factors there has been carried out the research of the influence of working body mass and energy accumulation in the volumes of the gas turbine engine on its parameters change. There have been found out the general dependencies of the consumption change, total pressure and the stagnation temperature on these criteria.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):248-256
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Methods and the experiment of the parametric identification compressors and fans mathematical models of according to the results of the gas turbine engine development test
Kofman V.M.
Abstract

On the basis of the method insignificant deviations and the compressor characteristics presentation forms as a polynomial there has been worked out and tested methods of the parametric identification compressors and fans mathematical models according to the results of the gas turbine engine development test.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):257-266
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Experimental researches of possible low-thrust rocket adaptation developed by FSUE R&DIME for bipropellant MON-3+MMH providing tolerable thermal state thrusters
Beshenev Y.A., Buldashev S.A., Kazankin F.A., Lemskiy N.V., Semkin Y.V.
Abstract
This paper gives firing test results comparison of FSUE R&DIME’s thrusters with the MON-3/MMH propellants and AT/UDMH propellants and also thruster thermal state information obtained during that firing testing.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):267-270
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Ultrasonic hardening of parts GTE
Alexandrov M.K., Papsheva N.D., Akushskaya O.M.
Abstract

The results of the study of ultrasonic hardening of free samplesfrom the balls of titanium alloys. Shows the effect of ultrasound on the physical, mechanical and operational characteristics.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):271-276
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Problems development of nuclear electric propulsion
Belogurov A.I., Kolbaya T.C., Rachuk V.S.
Abstract

This article describes the analysis of the development issues of nuclear electric propulsion system for spacecraft. The options of their principal solutions are considered.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):277-286
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Effect of "trivalent" chrome plating structural steel on its performance
Salakhova R.K., Semionychev V.V., Ilyin V.A.
Abstract

Results of tests on short-term strength and low-cycle fatigue specimens with "trivalent" and standard chrome, the results of fractographic researches chrome samples are represented. By vacuum extraction determined content of the hydrogen in the Cr(III) coating.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):287-293
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Wear resistance of chromium coatings, formed in trivalent electrolytes at presence of nanosized particles of metal oxides
Salakhova R.K., Semionychev V.V.
Abstract

Results of tribotesting "trivalent" chromium coatings with different microhardness in a dry mechanical friction are represented. The influence of metal oxides nanoparticles (Аl2O3, ZrO2), salts of molybdenum & vanadium, added to the oxalate-sulfate electrolyte chromium on wear and friction properties of coatings are investigated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):294-298
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Diagnostics of constructions' materials in the early stages of fatigue failure and estimation of the stress-strain condition of constructions’ material by methods of non-destructive testing
Mishakin V.V., Danilova N.V., Kurashkin K.V., Klyushnikov V.A., Gonchar A.V.
Abstract

The article presents the results of construction steels study by the acoustical, optical, eddy current and magnetic methods of NDT. The ways of assessing of the degradation degree of material in the early stages of fatigue failure and the stress condition of material were suggested.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):299-307
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Estimate of key parameters of a gas turbine engines with application of the modelling procedure of the equilibrium state of homogeneous mixture of hydrocarbon fuel combustion products
Boldyrev O.I., Gorynov I.M.
Abstract

The paper describes the modelling procedure of an equilibrium state of homogeneous mixture of hydrocarbon fuel combustion products. The analysis of influence of the factor of thermal dissociation of builders of products of combustion on key parameters of an air high-temperature turbine engine is carried out.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):308-313
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System-simulator load the steering organs
Aliluev A.V.
Abstract

Article is devoted development of system-simulator exterior loadings operating on steering organs. In article the system-simulator functional scheme, the general device, a principle of functioning, inspects and adjustable parameters also are resulted.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):314-316
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Increase durability of gas turbine disks
Nikishov O.V., Krutsilo V.G.
Abstract

The new automated installation for thermoplastic hardening was developed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):317-322
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Investigation of thermal conditions nozzle blades with a cyclone-vortex cooling system
Veretennikov S.V., Khasanov S.M.
Abstract

The results of an experimental study of heat transfer enhancement in channels of the cooling nozzle blade with cyclone-vortex cooling system are analyzed. The regularities of change of temperature fields and heat transfer coefficient on the surface of the cooling channels, depending on the number of the leads at different tangential pressure drops is established. Obtained criteria function for determining the heat transfer coefficient on the inner surface of the cooling channel nozzle blade with cyclone-vortex cooling system.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):323-328
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Plastic buckling of axially compressed tube
Nepershin R.I.
Abstract

Plastic forming of circular buckling folds is considered for axially compressed tube. Initial stage of the buckling fold forming is calculated using membrane rigid-plastic shell model with Mises yield criterion and plastic work hardening effect. Final stage of the buckling fold forming is calculated using ideal plastic bend model. Models predictions are reasonable correlated with experimental data.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):329-336
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Modelling of an ejector for turbine aeroengines for application in performance synthesis tools
Georgi J., Staudacher S., Falaleev S.V.
Abstract

The operation of ejectors is well known, however no models are available in modern performance synthesis tools. For designing an engine the effect of an ejector on the operation of a turbine aero engine and vice versa is of interest. Therefore the development of a module for caclulation of ejector performance on a turbine aero engine with a convergent primary nozzle for application in a performance synthesis tool is described. The module is to allow a flexible representation of ejectors and an appropriate consideration of the operation in performance synthesis. Initially a simplified mathematical 1-D model of the ejector nozzle is presented. It is valid for a lossless, compressible flow of an air/combustion gas mixture. The model is able to solve the flow equations for complete mixing of primary and secondary flows in case of both subcritical and supercritical primary nozzle flow.

Integration of the model with the performance synthesis programme SAEPP (Sophisticated Aero-Engine Performance Program) as well as the iterative approach to solving the equations is described. Example calculations are performed at selected operating points of the micro gas turbine engine ILA001 and compared to the results without ejector. The subsequent discussion of the results shows that the model which thus far was lossless needs to be expanded to consider inlet, mixing and friction losses in ordner to correctly reflect the operating behaviour of an ejector.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):337-344
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Problems and prospect of microgasturbines development for unmanned aerial vehicle propulsion
Zhdanov I.A., Staudacher S., Falaleev S.V.
Abstract

Today, there is considerable interest in unmanned aerial vehicles (UAVs). The correct choice of a propulsion system for UAVs, especially for small and medium-size classes, is a difficult task. Despite a number of significant advantages of microgasturbines (MGT) compared with the electric motors and internal combustion engines, first have a very low overall efficiency of the order about 17%, which was caused by low cycle parameters and low propulsion efficiency of modern MGT. So, improvement of MGT’s efficiency leads to better overall performance of UAVs and carrying out of further experiments and developing new approaches to MGT is very important.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):345-353
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Аcoustical-mechanical sound generators for creating an acoustical impression of а car
Starobinski R.N., Krasnov A.V., Kovaleva A.A., Vilch N.V.
Abstract

The technical devices for creating of sportive and informative sound in car passenger compartment are considered. It is shown that the controlled sound transmission from engine intake system into the salon is one of the most perspective ways of sportive and informative sound generation. The acoustical-mechanical devices (impressors), methods of their synthesis and development and are also considered.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):354-363
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The projecting of gas turbine engine composite blades
Ryzhov A.A., Galimkhanov B.K., Ryzhov N.A., Latypov R.K., Irgalin S.R.
Abstract

The constructions have been developed and the manufacturing technologies of gas turbine engine rotor and stator composite metal base blades are worked out. There are suggested the performance versions of rotor blade from BMg with titanium enclosure and guide blade from C-Mg coated by enamel. The necessary experimental checks have been performed; it is shown the serviceability of the developed parts.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):364-369
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Thermodynamic shape of the combined power installations, based on GTU and solid oxide fuel cells
Loskutnikov A.A., Gorjunov I.M., Bakirov F.G.
Abstract

The consideration of solid oxide fuel cell's calculation algorithm to raise the possibilities of program complex DVIGwT. The results of testing SOFC's calculation research were compared with experiment's results. Combined power installations; solid oxide fuel cell; steam-water conversion; structural – parameter synthesis and analyses.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):370-379
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Operational testing of thermoplastic reinforced blades
Krutsilo V.G., Krotinov N.B.
Abstract

This paper with the technology, what make possible to restore operability of turbine engines blades and increase it fatigue resistance is concerned.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):380-383
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Hanges in volume combustion and concentration of nitrogen oxides in the exhaust gases gasoline engine
Kolomiets P.V.
Abstract

For the convergence of the computational model the formation and decomposition of nitrogen oxides in exhaust gases from the experimental data should take into account changes the volume of combustion. Since this change is the parameter that determines the flow of the combustion process.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2011;10(3-1):384-391
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