Vol 11, No 5-1 (2012): Special Issue

The present paper investigates the motion of the mass center-rotor gyrostat with a cavity completely filled with a viscous liquid. Are given the dynamic equations of motion in angular rate on the axis of the body of the carrier-related coordinate system.The conditions of stability and instability of motion in the first approximation. For unstable regimes of motion is synthesized by active stabilizing control by the feedback principle.

The paper presents results of gas jets study generated by surface discharges in air at atmospheric pressure applied to the problems of flows control. The possibility of large eddies destruction by near-wall jet is shown. For modification of boundary layer by surface discharge, the electrode system configurations are discussed.

A model of a stationary vortex for the potential circulation flow around airfoil-spoiler combination has been proposed. The solution is obtained for the flow of incompressible ideal fluid. The Complex Variable Function Theory is applied. For the simulation of the recirculation area, a stationary vortex is used, the location of which is found by minimizing a velocity function. Dependence of the lift on the angle of attack, relative length of the spoiler and its angle of deflection is obtained.

Buoyancy-induced flow of water in the long vertical cylinder is studied. CFD (Computational Fluid Dynamics) tools (Ansys CFX) is used. Influence of aspect ratio and difference of temperatures on wall of the cylinder on intensity of buoyancy-induced flow is analysed.

The features of geometric dimension of linking the elements of assembly of compounds based on a unified information model of the product. It is shown that when establishing tolerances for each of the links dimensional chain of fundamental importance that the ratio between actual design and technological constraints dimensional element of the assembly determines the level of residual stresses in the product design, resulting in the assembly process, and should be considered in computer-aided design technology processes.

We study the possibility of building a digital model of the aircraft lighting unit diffuser surface, being an authentic reproduction of the real headlight diffuser, using the state-of-the-art modeling tools. The authentic numerical model means that not only the geometric parameters but also physiotechnical properties are in the maximal possible agreement with the real object. The use of the authentic 3D model in various CAD-systems will not only enable the real object’s performance parameters to be prognosticated but also its design to be optimized based on a variety of criteria.

In work the design procedure of factor of rigidity of an elastic element of type of "the squirrel wheel» is resulted. The given technique allows to raise essentially accuracy of calculations of the elastic elements applied in aviation engines.

The residual stresses after nitriding in specimens with notch made of 38Х2МЮА steel are studied. It is established that the average integral residual stresses criterion can be used for the evaluation of endurance limit increment at bending for such specimens.

On the example of specimens made of steel 20 of different diameters experimentally
established, that the utilization is more rightful for of surface hardening influence on endurance
limit under stress concentration.

The influence of cementation, nitriding and borating on endurance limit of corset specimens made of ВКС-5, ЭП718 and ВНС-17 allows under normal and high temperatures are studied. It is established that the average integral residual stresses criterion can be used for the prediction of endurance limit for specimens like these.

The calculation research of the working process of multistage axial turbine in two different software systems was performed. The calculations were performed using an identical geometry, boundary conditions and under the same engine operation conditions. Detailed information about the parameters and structure of the flow in the turbine.

The estimation of possibility of use combined vorticalvind-energy plants for development of the electric power. The three-dimensional model is designed and numerical calculation stator parts vind-energy plant is executed. Distributions of parameters of a stream in all settlement area are received. Dependence of power efficiency of installation on static pressure on an exit from calculation area is revealed.

Various approaches for simulation of gas turbine engine core operating by means of CFD software are presented. Their main advantages and disadvantages are described.

Main underlying principles of the CAE-system «ASTRA» are described.

Influence of the initial design data uncertainty on the choice of optimal working process parameters of gas turbine engine is described.

The influence of rotor blades with anti-vibration shroud and Shvarov's profile compared to conventional blades on compressor efficiency is investigated. The variation of compressor efficiency is quantitatively evaluated at 4 operation modes.

The relation between turbine inlet temperature at flight cruise mode (at specified thrust value) and the bypass ratio is described. It is proved that the increase of the bypass ratio leads to increase of gas temperature value.

Methodology of automotive creation of vane 3D-model for gas-dynamic analysis in NUMECA is seeing. Ways of solving different problems during this process is suggested.

This paper presents the results of computer simulation of magnetic-pulse processing of metals using a new electromagnetic module of the multi-purpose finite element software LS-DYNA.

In this paper the results of exploratory researches in the Samara State Aerospace University, to obtain of the “metal-nonmetal” compounds with the action of pulsed magnetic field (PMF) in the molten metal are considered. Two types of such compounds are obtained: 1) metal electrical contact plugsin the carbon blocks, and 2) a composite material based on aluminum matrix reinforced with carbon fabric.

Existing ways ofstretch forming aren't capable to ensure obvodoobrazuyushchy covers of double curvature of the minimum nonuniform thickness. However use of the flexible device of mathematical modeling of surfaces of planes and coverings will allow to execute all necessary calculations and to offer the consecutive scheme combining two operations of covering with intermediate unloading and unbendingby received on the first covering of a cover of the demanded geometrical form.

The article gives the analysis of World Trade Organization documents with the aimo festimation of probable consequences of Russia’s accession to this international organization for national aviation industry. Three groups of documents were under consideration – multi lateral greements, dispute cases materials and Russia’s accession documents. It was found that government support of aviation industry does not completely correspond to WTO legislation. It is advisably to work out new methods of civilair craft development financing using the experience and materials of WTO disputes of civil aircraft producers.

The article tells about the way of editing recognition and machining rules for new features. Also here are researches of the most efficient ways of using CNC machine’s options.

The paper describes an approach for production enterprise staff interaction management in processes of designengineering technology of aerospace techniques in integrated information space based on a methodology of top-down design. There is provided an analysis of practical implementation of top-down design methodology in Samara Space Center. To implement the top-down design methodology there is proposed a structure for conditional management of new technique design workflow.

The approaches to the continuous information lifecycle support system construction are investigated. Systems mentioned should be based on poly-platform information systems integration.Comparison of mono-platform and polyplatform solution from the applicability is presented. Necessary conditions for autonomic system integration are shown. Model of construction integrated information lifecycle system is suggested.

The paper presents an Internet-based system developed to collect data of technical condition of aircraft components from aircraft operators that do not use information systems with the ability to export the data.

The question of automation registration and control certificates of airworthiness of the aircraft by means of information-analytical system for monitoring aircraft airworthiness.

Realization of the efficient personnel training model is presented. Recent social and economic factors have been taken into consideration. The main directions of the strategic alliance of Ulyanovsk State University and CJSS “Aviastar-SP” are shown.