Vol 6, No 2 (2007): Special Issue

Full Issue

TECHNICAL SCIENCES

Temperature’s fields and hydraulic losses in combustion chambers of small gas turbine engines

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Abstract

It is shown formation peculiarities of gas temperature fields for combustion chambers of small gas turbine engines. It is described the more sharp calculation model of hydraulic resistance ratio, also in details it is shown the influence of combustion chambers’ design parameters on gas flow’s temperature fields and it is proposed recommendations for design and production of combustion chambers for small gas turbine engines.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):9-14
pages 9-14 views

Multistage combine swirl cooling system for aircraft’s board equipment

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Abstract

In this paper it is described the design of multistage combine whirlwing cooling system chilled aircraft’s board equipment. This system is based on the principle of selfevacuated divided whirlwing tubes.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):15-20
pages 15-20 views

Numerical modeling of physical processes in fuel tank refueled by cryogen conventional gas with undrainaged storage

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Abstract

This paper deals with the method of numerical modeling of physical processes in fuel tank, which can be refueled by cryogen conventional gas or compressed conventional gas. Calculation data confirm real prospects of creating of universal tanks pilot models and their tests and exploitation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):21-27
pages 21-27 views

Numerical simulation of working process in afterburner chamber of vapour gas machine with NK-37 engine

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Abstract

The results of the numerical modeling of the gases mixing and gases mixture combustion processes in the afterburning chamber of the afterburning module for the combined-cycle plant are presented in the article. The characteristic features of the finite-element model of the stabilization system element are described. The burning gases mixture temperature levels, combustion efficiency and nitrogen oxides emission at different operating modes are given and analysed.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):28-33
pages 28-33 views

The ways of operating process’ improvement in internal combustion engines

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Abstract

In this paper it is shown the main ways of operating process’ improvement in internal combustion engines used by foreign companies that produce engines. It is dedicated main work directions and described serial engine designs with their advantages.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):34-41
pages 34-41 views

Vertex thermoelectric supplier for gas provided stations

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Abstract

This article deals with device based on vertex effect of energy gas’ deviation and thermoelectric transformer for gas provided system. In details it is shown investigation results of thermoelectric device used for electric energy generation with power 8,4W. Additionally it is described heating system for high pressure reducer RLDKM-100.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):42-47
pages 42-47 views

Diagnostics of quality mixing in spray of the fuel nozzles by optical methods

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Abstract

Use of the offered method of diagnostics of parameters air-fuel spray allows finding spatial and time heterogeneity of concentration of drops and their sizes in real front devices. Carried out research atomization fuel from a plate has shown an opportunity of application of this device in engines for improvement of a spray in comparison with atomization of free jet in a cross flow stream.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):48-53
pages 48-53 views

Comparisons of performances of various injector types used air flow

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Abstract

Common classification of injector devices are carried out in paper. The classification of devices used air flow energy for atomization fuel is developed. The general descriptions of spraying principles for each separated group are given. Influence of the ratio of fuel-air flow rate and air pressure drop on SMD is depicted.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):54-61
pages 54-61 views

Cars diagnostic of gas flow, electrical charge and burning processes

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Abstract

It is described questions of CARS spectroscopy nonlinear optical method using in investigations of gas flows, burns and electrical charges. It is shown that the using of this local diagnostic method allows receiving not only quality information, but also quantitative data about frequencies and lines’ width in diffusion specters of molecular transitions, functions of molecule condition’s distribution, temperatures in range 10-4000K and about processes of molecule energy distribution and transmission.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):62-66
pages 62-66 views

Simulation of lean blow out process inside gas turbine combustor

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Abstract

In this paper a model describing flame destabilization process is presented. This model takes into account various physical processes, which lead to flame destabilization. Results of simulation show a good agreement with obtained data of test. Nevertheless, the proposed approach requires further validation and development.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):67-71
pages 67-71 views

Computational method of the gas flow turbulence intensity at the gas turbine engine combustion chamber outlet

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Abstract

Formula for evaluation of the gas flow turbulence intensity value at the gas turbine combustion chamber outlet was substantiated and relation of this value to its design parameters was shown.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):72-76
pages 72-76 views

Effect of the inlet flow gas temperature field and turbulence on heat transfer in the turbine nozzle cascade and combustion chamber optimization

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Abstract

Optimal relative values of the gas collector length and the combustion chamber flame tube air holes total area were substantiated on the basis of analysis of mutual effect of the inlet flow gas temperature field irregularity and turbulence on heat transfer in the turbine nozzle cascade.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):77-82
pages 77-82 views

Numerical modeling of physical processes in fuel tank refueled by cryogen conventional gas with undrainaged storage

1 1., 1 1., 1 1.

Abstract

This paper deals with the method of numerical modeling of physical processes in fuel tank, which can be refueled by cryogen conventional gas or compressed conventional gas. Calculation data confirm real prospects of creating of universal tanks pilot models and their tests and exploitation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):83-86
pages 83-86 views

Combustion characteristics management of air-aluminum flame in co-current air flow

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Abstract

The report presents the results of an experimental study of combustion characteristics of an air-aluminum flame and method of management of combustion characteristics in a co-current air flow (М = 0…0,6).
The study reveals that geometry and characteristics of an air-aluminum flame combustion can be effectively managed by using circular vane swirlers and a diffusion nozzle (S = 1,8…2,0).

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):87-92
pages 87-92 views

Mix forming and burning in heat engines with twisting of air punch

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Abstract

The article deals the data illustrated the charge swirl motion impact to heat engines parameters. This paper describes the opportunity of swirl motion regulation in the engine with separated induction system. The experimental data confirm effective and emission parameters improving without power and volumetric efficiency decreasing inWOT operation.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):93-96
pages 93-96 views

Mathematical model of combined combustion in internal combustion engines

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Abstract

Work cycle of multifuel piston internal combustion engine, which is realized by means of the organizations of combined ignition and combustion, is considered.Mathematical model of two stage combined combustion, on I. I. Vibe factor, is presented. Matching of numerical and experimental data is carried out.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):97-102
pages 97-102 views

Thermodynamic effect of gas stream division and its using in different fields of human activity

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Abstract

This paper deals with thermodynamic effect of gas stream division during high-speed outflow and its using in different fields of human activity.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):103-107
pages 103-107 views

Visualization of gas flows structures by mean of schlieren and interferometry methods

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Abstract

Results of utilization classic refractometry methods such as schlieren and interferometric for investigation of transparent flows in modern aerodynamic experiment are presented. Restrictions of all represented methods are described.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):108-113
pages 108-113 views

Different factors influence upon filling ratio of piston engine

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Abstract

In this paper it is proposed alongside with known calculation formulas a new formula, which shows very well an influence of different factors upon filling process in piston engine.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):114-117
pages 114-117 views

Developing of low emission fuel burning system in gas turbine engines

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Abstract

In this paper it is shown the influence of catalytic neutralizers on CO and NOx concentrations decreasing in gas turbine engine’s burning products. It is proposed based on investigations burning low emission system, which include the combustion chamber and the catalytic neutralizer in engine’s exhaust system.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):118-127
pages 118-127 views

Lean fuel-air mixture burning in the cases of inward and outward ignition by combustion products

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Abstract

The combustion model, based on the idea of combustible mixture ignition by turbulent pulsations of the burned gas moles, is proposed. The model includes increasing of lean region of ignition with temperature increase and gas swirling effect on burning rate. Comparison of the two schemes of burnings of lean mixtures in proposition of equal mass flows and velocities of fuel mixtures shows that at swirling only central flow mean burning efficiency at initial part of tube is more for inverted (outward) scheme of ignition. Full burning of mixture for tradition scheme is realized more effectively.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):128-133
pages 128-133 views

The influence of fuel chemical speciation on car exhaust of benz(a)pyrene

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Abstract

In this paper it is analyzed the influence of fuel chemical speciation on IC-engine blast carcinogenicity, which relates to change of native fuel’s requirements. It is proposed measures for increasing of car benzins’ ecology, which provide keeping of their characteristics.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):134-136
pages 134-136 views

Automated accurate finishing of gas turbine engine’s combustion chamber

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Abstract

During process of accurate grinding of gas turbine engine’s elements it is paid attention to combustion chamber, because it requires a lot of experiments in laboratories and in real conditions. Software applications, realizing math models, either in design calculations or in verification calculations makes a design and accurate grinding process easy, but also decrease their costs.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):137-140
pages 137-140 views

Fault crossing safety estimation for the underground pipeline

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Abstract

The natural influences that cause emergency situations (such as earthquakes, tornadoes, landslides, subsidence of rock etc.) couldn’t be controlled and that’s why the enough level of safety for these causes should be satisfied during design. It is necessary to notice, that models of rare events are widely used in safety calculations.
In this paper for safety and risk indexes estimation of the concerned pipeline the Bolotin’s theory is used.Method of interpolation polynomials is used for statistical dynamics problems.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):141-150
pages 141-150 views

Infrared gas burning device developing based on twisting ejector

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Abstract

There exist a number of methods for heating of materials and machine elements. But radiation method is the most effective and economical one out of them i.e. transfer of heat energy from it is source (generator) to the object by means of radiation. With regards to this infrared radiation has got the greatest interest. The heat generated by the radiating surface is similar to the sun. The gas is burning in the combustor where, heated to the specific temperature, forms a heat flux (wave radiation of infrared spectrum), directed to the heat source or to the object directly. Infrared ray falling to the surface (floor, objects, equipment) heats the surface. The air in the hot zone is heated for the second time by the heated surfaces. Heat waves immediately form comfortable microclimate in the zone.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):151-154
pages 151-154 views

The designing principes of afterburner system for high efficency vapour gas machine based on NK-37 engine

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Abstract

The high efficiency of using of the aeroengine afterburner operating process organization principles while designing afterburning chambers for the combined-cycle plant is shown in the article. The main technical solutions of such afterburning chambers design and approaches to fueling automated control system algorithm development is given as well.
VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):155-160
pages 155-160 views

Detonation burning concepcia application in aviation power-plants

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Abstract

The advantages of a detonation application in aviation power-plant were proved with the thermodynamics point of view. The review of detonation utilization in aviation engine were performed, also the advanced conceptions were selected. Quick information about state of pulse detonation engine research was reported. The issues of pulse detonation engine development were structured and schematically show.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):161-167
pages 161-167 views

Features of the cost-function analysis in the process of gas-turbine engines competitive strength heightening

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Abstract

The article reviews the methodology of gas-turbine engines competitive strength heightening in modern technical and economic conditions by providing the balanced ratio of qualitative and cost indexes with the use of the cost-function analysis of manufacturing stages of the life cycle.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):168-171
pages 168-171 views

Boundary layer separation investigation in diffusion channels with swirling cells

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Abstract

This article deals with boundary layer separation problems in diffusion channels with swirling cells and it is also shown investigation results.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):172-177
pages 172-177 views

Fuel distribution comparison analysis in three-stage swirling sprayer modules

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Abstract

This work devoted to investigation of frontal device with 3-stage swirler for low-emission combustion chamber. Fuel distributions for three design models of three-stage swirling sprayer moduls were compared. The computational results show the separation degree of fuel droplets on the module walls. The fuel concenration fields were also calculated.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):178-184
pages 178-184 views

Computational processes simulation inside of micro scale burner

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Abstract

The paper presents the results of CFD flow simulation inside the micro scale burner. The study has been carried out in order to evaluate the influence of grid density, burner scale, turbulent models and viscous variation driven by temperature variation on the mixture uniform at the burner back end.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):185-190
pages 185-190 views

The influence of swirl burners on characteristics of gas turbine engines’ combustion chambers

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Abstract

In this paper it is described experimental investigations of simple and complex swirl burner’s designs. It is shown the influence of swirl burners on characteristics of gas turbine engines’ combustion chambers such as blowout, fuel burnup and hydraulic losses.

VESTNIK of Samara University. Aerospace and Mechanical Engineering. 2007;6(2):191-195
pages 191-195 views

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