Vol 8, No 3-1 (2009): Special Issue

The basic laws and features of plotting of wearability, wearproof and heat-resisting coverings on a detail of a gas path of the turbine, the compressor and the combustion chamber of gas turbine engine by gas-thermal plasma and ionicplasma vacuum methods are considered. The basic updates and elements of modernisation of the equipment for gasthermal and an ionic-plasma vacuum method are shown. For calculation of the temperatures, flowing and residual pressure real cases and receptions at spraying are considered.

The disk finite element was developed for structural analysis of rotating nonuniform heated disks from the gas turbine engines. FORTRAN code program was developed for structural analysis of rotating nonuniform heated disks from the gas turbine engines.

Despite its simplicity the quasi-isobaric, steady-flow combustion in gas turbines has been identified to have major disadvantages. The highly irreversible heat addition process in conjunction with inevitable loss in stagnation pressure represent an obvious penalty to engine performance and limit the thermodynamic cycle efficiency. This intrinsic drawback of conventional gas turbine combustion can be substantially improved by introduction of pressuregain combustion. The main advantage of pressure gain combustors is their potential for a significant rise in thermal cycle efficiency, its magnitude essentially depending on the specific device chosen. The thermodynamic advantage of pressure-gain combustion is analysed and shown as a function of the combustor pressure ratio for various gas turbine engine setups. Further, the aim of this paper is to summarize the status and important research efforts in this field. A compilation of proposed pressure-gain combustor concepts is presented with regard to its performance, mechanical complexity and suitability for use in gas turbines.

In paper agency of members (depth of the room, a diffusor and an ejector), rendered on tractive characteristics of the pulse detonation engine (PDE) is observed. The essence of computing experiment is stated, its results are resulted. Besides the generalised results of fire tests of demonstrator PDE are resulted.

The problem of increasing the sensitivity of the built-in control sensors of parameters particles of contamination in a working fluid of hydraulic systems is considered. We offer the algorithm of processing of experimental data about distribution of contamination particles powder. The technique of forecasting distribution of contamination particles powder in the size less then 5μm by data about distribution of larger particles is described

In the article experience of creation a test stand of pulse detonation engines is stated. Stand operating modes, representation and information machining, order of conducting fire tests are presented structure and functions of the test stand, possibility used technical and software.

In the article the results of testing the efficiency of the developed model and technology of forming teachers readiness to fulfill tutor’s activity is being analyzed. The lack of tutors or their insufficient readiness (professional, psychological and technical) to fulfill tutor’s activity seems to be the main obstacle in introducing distance learning in the Russian educational system.

The experimental equipment developed for the decision of tribological problems, arising at use of friction joints in the environment of heavy liquid metals is submitted as heat-transfer medium for contours of nuclear power installations. For researches of fretting-corrosion of heat release pipes in contact with spacer grid cell the installation modelling a fretting process in the contacts with the purpose of a substantiation of vibration strength of a steam generator of a reactor on fast neutrons with the lead heat transfer medium is created. Experimental installation for research and resource tests of cylindrical involute gearings and the sliding bearings working in reactors on fast neutrons in the environment of the lead heat transfer is described. Experimental samples of circulating pumps for reactor installations, intended for research of wear process characteristics of steel and cast iron sliding support working in the environment of lead, eutectic alloys lead - bismuth and lead - lithium are developed.

The theoretical analysis of a spectrum of the vibration generated by not centered shafts, connected by gear gearing. For the first time it is shown under what conditions generation of the third harmonic of frequency of rotation of rotors is possible. Results of the analysis are confirmed by an experimental material.

Account problems at stages of a choice of constructional materials of features of manufacturing techniques of details and the operational factors influencing HCF are considered

Techniques for modeling stable fatigue crack growth in highly stressed structural parts under simple and complex loading cycles have been developed which are based on the theory of local high-energy-type fracture mechanism acting at a crack front in the second stage of fatigue crack kinetics. The techniques have been verified with the use of 3D finite element modeling and microfractographic reconstitution of fatigue crack growth in aero engine turbine discs.

This article describes the actual experience with the integrated CAD/CAM system for the high-speed and highefficiency machining in the aircraft industry. Author examines the most important aspects of the machining, influencing the efficiency of the selection. New high-performance cut-maps are presented in the article. It also contains the practical results of machining of parts made of the aluminum alloy and stainless heat-resistant steel.

The seal design influence on work of the secondary air system in gas turbine engine is shown. The design method of the such system with the definition of mutual influence of gas seal and radial gap change is generated. This methods and means for practical realization are recommended at the engine design.

The CAD system world already became 3D. But 2D modeling is still actual for many of engineering tasks. This article gives the retrospective for 2D modeling tools in CAD systems and explains some special methods, used in ADEM-VX system. Samples are given in 2D solid mechanism and layer-mechanism for assembly creation in 2D.

We offer the algorithm of calculation combined energy installations, based on turbojet and SOFC. You can find а scheme of calculation SOFC. Here you can investigate the description of various main hybrid electrochemical power engineering install based on turbo jets and fuel cells.

In work the technique of theoretical definition of temperature fields at thermoplastic hardening is presented. As an example results of calculations for unilateral cooling of a large-sized detail of type of a disk of the turbine of gas turbine engines are shown. Comparison of settlement and experimental temperature fields is resulted.

The heat exchange processes computer models in combustion chambers of power installations have been elaborated with the help of cellular automata. The peculiarity of worked out models is in calculation of not homogeneous heat conduction coefficient in examined field. Comparison with analogs shows increase of computer models precision and rise of calculations rate in more than 4 times.

In this work the methodology of an estimation of parameters of reliability GTD with a glance sudden failures is presented. By this methodology the analysis of influence of the limit of the geometrical sizes, rotating frequency and disk material density on failure rate is carried out.

The results of traditional combustion chamber with modified consruction examinations are presented. Decreased concentration of toxic agents emisions in comparison with serial combustion chamber is reached.

Results of working out of system of technical decisions for ensuring the high quality of friction units of gasturbine engines are described in the report, including the model for calculating the wear resistance of friction units, new scratching method and tester for estimating the activation parameters of deformation and destruction of surface layers, methods of hardening the details of friction pairs and other offers.

The regular piston, the piston with gallery oil cooling and steel piston of the forced diesel engine are investigated. In the course of calculations hydrodynamic lubrication theory based, their hydromechanical characteristics has been evaluated. Optimum parameters of design skirt for each piston are found, allowing to reduce power loss, oil consumption in a direction of combustion chamber, to increase minimal thickness of a lubricant layer.

Designs of systems internal and external vibrating isolation manual machines of rotary and shock action are considered. Designs of systems vibrating isolation and the modernized samples of the manual tool are resulted. Results of their tests under production conditions.

In the report the technique and results of calculations of durability the spherical roller bearing of a satellite gear wheel of a planetary reducer contain. At calculation efforts in gearing of a gear wheel of planetary transfer, and also centrifugal forces of portable and relative movement, both rollers, and gear wheels are considered. Are considered both deformations in contacts of rollers, and deformations of a deflection of the outer ring combined with a gear wreath. Durability calculations are made on base contact pressure. Recommendations about increase of working capacity of the bearing are resulted.

For support stable optical axes of diagnostic system and exception of temperature source and receiver dependence is advantageous to both functions coincidence in one elements. This possibility is enable due to semiconductor lasers feedback effect. The semiconductor laser performance with external feedback is described by complex resonator.

The paper shows the method of calculating elastic and damping characteristics of ring damper made of the MR material with partial coverage of the coaxial space between a support and a cylindrical vibrating bearing. Shown that a precessional loading results in elliptical hysteresis loops at projections on coordinate axes of damper. The magnitude of reactions depends on the geometrical parameters of support, the density of the wired material MR, prior tightness of damper. Found that the volume of a gap in the ring damper deforms the elliptical shape of hysteresis loops and their orientation in the coordinate system of load characteristics.