Vol 7, No 3 (2008): Special Issue

Mathematical model of a motion of varigrained particles in combustion-gas stream of hypersonic stream generator has been developed. Dependences of impulse and energetic characteristics of inoverexpanded two-phase from process parameters are received. Research influence of gas stream generator parameters on particles kinetic energy carried out.

The analysis of the onboard rocket tanks pressurization system functioning is presented. The basic direction of the rocket tanks pressurization process are proposed.

In this paper it is shown the ways of automatization using in design process of new gas turbine engines with decreased blowout nitrogen oxides.

Article is devoted to an actual problem of modern aviation propulsion engineering - to creation of parametrical model blades. In article results of work on parametrization blades the compressor of 7 steps of engine NK 14 ST are resulted. The program on creation macros for formation 3D is submitted to model to a feather blades. Areas of use of results of work are discussed.

With the purpose of increase of competitiveness on the basis of through parametrization by authors new typical technological process of manufacturing of blades of the directing device of compressor TJ, a technique of designing of the industrial equipment including working elements of a stamp for manufacturing of preparations by high-speed punching, patterns for averaging an allowance on feather of the blade and the control, electrodes for the electrochemical progressing (ECM), the adaptation for turning processing the directing device in gathering are offered.

Complex researches the ECM heat resisting deformable CrNi-steel ЭП-517Ш (15Х12Н2МВФАБ-Ш) are lead. The offered technology pulse the ECM allows to receive details corresponding to requirements of the drawing both in the sizes, and on quality of a superficial layer.

Hydrogenium saturation of a machined surface for finished pulsed electrochemical machining (ECM) of titan alloy (BT9) TJ blades is an important problem of modern aviation propulsion engineering. The article gives the results technological factors research influence on Hydrogenium saturation of the processed surface. The equation of regression for Hydrogenium saturation and based technological factors of finished pulsed ECM was presented. The fields of the application of the research results are discussed.

Clause states a technique of adjustment of a circuit of division tooth milling machine with the differential mechanism. This summing mechanism is applied to reception by independent cinematicsing of adjustment on a corner of an inclination tooths thread of a wheel. In this mechanismthe addition of two movements in one under the formula Villisa is analyzed, with the purpose of reception of the transfer relation of unit of adjustment of a circuit of division. Two widespread types of differential mechanisms are considered.

In article it was told about a range of application of installations with multisupport rotors and necessity of exclude of work of such installations on critical modes or near to them.
Approaches in the solution of problems of definition of critical frequencies of rotation multisupport rotors among which the method of calculation such rotors as rotors on the elastic basis are offered. The example of calculation multisupport rotors of acoustic stand was presented. Advantages of the given method, and also possibility of his use are specified.

Two ways of structured plain algebraic computation grid for tetragonal regions with curvilinear sides are introduced. Uniform way can be used in tetragonal regions with arbitrary side shape. Equidistant way is used in regions where two opposite sides are equidistant.

The review and the analysis of existinq methods blades is presented. The constructive decisions and technique of definition of additional loading conditions for maintenance of destruction of fan blade on the set frequencies of rotation are proposed. The experimental investigations of determination of a efficiency control by destruction of fan blades for maintenance of check of casings containment capability are carried out.

Metal Rubber is all-metal anisotropic material for vibration protection with high strength and damping. Ability of this material to keep its properties under high loading (compression in different directions, tension, shear) is researched in the present paper. Results of this research allows to calculate stability of vibration protection systems for shock loading.

The article gives an overview of known devices for the determination of blades working state in operational conditions, points out to the drawbacks of existing systems, describes the block diagram offered for turbo-units defective blades diagnosis, shows technical characteristics of the devices developed, its tests results and application examples.

The finite element mathematical model of dynamic characteristics of pipe system is developed. The model allows calculations of pipe characteristics under force excitation by oscillating fluid flow, including unsteady conditions. The pipe system can be of complex configuration. Results of calculation on the developed model are presented.