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

Developed a method calculation of gas-liquid jet duplex fuel nozzle with internal mixing them any design concept. Expressions are obtained for determining the coefficient of discharge jet fuel nozzles on all possible modes of operation to the actual flow of the fuel components. This allows the required accuracy for practical purposes to calculate all required parameters of the projected duplex fuel nozzle.

Article offers a method for evaluating possible quantity of cases the identification of gas turbine engine to adequately describe test data with limited number of measured parameters. The dependence of the possible quantity of identifications on the number of identifiable and measured parameters is researched

The technological production process for single-crystal turbine blades requires control of the crystallographic orientation in both manufactured blades, as well as in many auxiliary pieces. The Laue back-reflection method is the simplest and quickest method for these tasks. It is also the quickest and simplest method in terms of technical equipment requirements. The paper presents an original computerised method for processing back-reflection Laue images (epigrams) and a specialised, small table-top unit to determine the orientation of single-crystal objects, as well as disorientation between grains in the object. Comparative results using the Laue method and diffractometry method for testing single-crystal items made from heat-resistant metal alloys from four engine plants are presented.

This paper presents the results of a study influence the structure of sound-absorbing panels structures (CLP) for sound absorption, measured using an acoustic interferometer. The estimation of influence on the sound absorption coefficient of ZPK honeycomb type, degree of perforation of casing, type of material and hundreds of skins.

The acoustical-mechanical system for creating of informative sound in passenger compartment based on resonance excitation in car intake system is considered. It is shown that acoustical connection of aircleaner cavity with engine compartment by membranes and an involving in oscillations of air masses and volumes inside an intake system allows effective increasing of informative sound of the first harmonics radiating into engine and passenger compartments.

The additional possibility of ICE combustion data accessing was experimental investigated. Correlation between ion current and flame propagation speed in spark ignition engine for some different engine condition displayed. Calculated laminar flame propagation speed dependence on ion current was received

Measurement techniques optimization of geometrical parameters of parts "small rigidity ring" and "dove tail" of GTE blade is performing in the article. The goal is achieving using the provisions of a theory of probabilities and mathematical statistics.

Working out of a design of the ring chamber of combustion with the modular torches, providing the small maintenance of harmful impurity in exhaust gases is executed. By means of a package for imitation gasdynamic processes with use of program FLUENT are simulated gasdynamic processes in several variants of models of torches and their optimum geometrical parameters are revealed. The quantitative estimation of quality of mixture of methane with air in the second contour of a torch is executed.

The paper describes an algorithm allowing to find quickly and intuitively the combination of the main variables that determine the turbine workflows, allowing to achieve high efficiency values with an allowance for the structural, strength and other restrictions.

In article the algorithm of aircraft engine designing based on unified gas generator is considered. Also here the main stages of such model creating are described. This stages include thermogas dynamic account, blade profiling, The algorithm combines accounts of hydraulic resistance, thermal condition, unite assembling and detail data base creating, strength accounts and assemble scheme.

Results of research of size distribution for size of holes in plane and cylindrical elements made of MR material are presented in this article.

The heat energy of fuels used in a heat engine cycle is the source of the cycle's useful effect. The maximum fuel efficiency is particularly desirable in rocket and aircraft engines due their carrying the fuel (and the oxidant, in rocket engines) during the entire mission. In vehicle engines and power plants fuels are selected based on their cost and availability. Using the most prevalent Brayton cycle as an example, the article considers parameters that determine the maximum available heat factor introduced by a fuel into the cycle. Two parameters limiting the Brayton cycle's efficiency are considered, the maximum efficiency imposed by strength properties of materials and the maximum level of combustion products. The values of excess air factors for fuel combustion processes and limiting characteristics of heat engine cycles are determined for the case of Brayton cycles.

The main arguments in favor of creating a program for calculating the elements of the internal combustion engine cooling system for use in the learning process during the lab exercises.

Modern counters can store the data during time about one year and or transfer on communication channels in the automated monitoring systems and the account of power consumption which on modern promysh-lennyh the enterprises are integrated into the general automated system by technological processes of manufacture. Besides maintenance of an uninterrupted cycle of works of MANAGEMENT information system ТP should possess high degree of information security.

The paper discusses results of fire tests of the experimental combustion chamber for perspective liquid rocket engine with cooling by liquid oxygen without inner cooling. The correspondence between obtained experimental data and design parameters have shown. It is concluded that the cooling of cryogenic oxygen is reliable. Even with a leakage path of cooling the combustion chamber of serious damage or structural failure does not occur. During the fire tests the presence of leaks in the fire wall of the combustion chamber does not lead to the destruction of structure.

Based on the experimental study a suggested physical model working processes in the combustion chamber LREST with jet-centrifugal jets on the hypergolic propellants into six interrelated areas.

This article review problems of kinetics of processes in a spherical particle under heat and mass transfer in conditions of chemical reaction or structural phase transformations. We use the approach of quasi-equilibrium to resolve kinetic equations. It is shown, that the suggested method simplifies the decision of this problem. For heat exchange and mass transfer processes with heat absorption, we received the closed system of the kinetic equations which can be investigated by numerical methods. Numerical calculations for a case of roasting of limestone particles are obtained.

The article studies possible options of development of the «reliability» diagrams which take into account the consecutive mode selection of the fuel flow automatic control system which is considered as a system with elements with three conditions. The article contains main concepts of development of an algorithm used to form a column of the high-order matrix of the incompatible conditions defined by the priority of the failure mode vector component of the control system which characterizes position of the fuelling switch at the failure mode condition as «failure». The article considers a possibility to form components of the «reliability» diagrams using the network structure database. A possibility to state a problem and develop the «reliability» diagrams using calculation equipment is studied

Here, I present the designs of compressor vanes with a damping device, developed in a research laboratory at the Department of "Construction and design of aircraft engines". The results of the use of dampers in GTD NK-12, NK-14 and NK-8, "E" and "P" products, are shown.

The description of the solutions to minimize the negative impact of surging on the stable operation of the engine helicopter, appearing at the entrance to the air intake of the helicopter at the time of launch unguided aircraft rockets (rockets), and is the application in the construction of the visor and perforated stilling.

The article presents the results of theoretical and experimental studies on intensification through antechamber major limiting stages of the flow of the working process in the combustion chamber: the gasification of liquid phase intermediates and evaporation of unreacted fuel components Comrade through the organization of effective secondary crushing and mixing of gas-phase and mouth-injuries of large-scale non-uniformity of the ratio of the fuel components in the cross section through heavy turbulence in gas-phase intermediates

Developed by the authors presented a constructive and small-sized circuit pneumohydraulic bench setup to enable a refinement of modes wet cleaning duct GTE factory terms instead of pilot tests of real engines. Relations are obtained that allow reasonably calculated to determine the necessary structural, geometric and kinematic parameters of the installation.

Defect is considered as set of dependences on other defects. On degradation processes accumulate the subjective reasons (infringements of service conditions, inadmissible loadings, use of inadmissible operational materials, etc.). A difficult component is the complex reason in the form of operational defect: the constructive, technological and operational factor.

The residual stresses in the flat specimens with openings made of ЭИ698ВД and ЭП742 alloys after ultrasonic treatment is studied. It is established that ultrasonic treatment creates great values of compressing residual stresses in the surface layer of openings

For the purpose of detection and recognition probabilities estimation of objects depending on parameters of measurement system statistical modeling of the given process was spend. The functions of probability depend on relation of spot diameter to the characteristic size of an element of investigated surface, level of noise, number of rereflec-tions in surface elements were defined. Possibilities of noise level decrease in measuring systems was shown at laser power stabilization.

Concept of construction of virtual lab for gas turbine engine testing is described. Virtual lab for gas turbine engine testing is one of components of gas turbine engine mathematical model and provides possibility for engine testing and determination of its performance parameters.

In the propulsion engineering it's expedient to spend welding of small thickness metal alloys by pulse laser radiation. It's established that formation of welded joint with strip power source gives possibility to increase the weld cross-section area and, as consequence, joint strength. At welding of high-temperature and heat-resistant nickel-based alloys {superalloys} strength of welded joint raises on 10...20 %. Carbides were dissolved, the cast zone has homogeneous structure without emptiness and blisters that specifies in high workability of welded joint.

Currently, the increasing use of infrared thermal imaging systems are in science, engineering and technology, which allows to visualize, process and display measurement information characterizing the processes taking place with heat. The results of the use of such systems for research and testing of the thermal state LREST.

The article presents the results of the application developed by the authors of digital speckle interferometer with a continuous laser to study the resonance characteristics of the working plate (rolling shutter) pneumatic valve with acoustic stimulation and interaction with the body and the flowing gas stream.

The mutual influence of the characteristics of the engine and fuel elements gas of the equipment on algorithm of management the engine of internal combustion with spark ignition working on gas fuel is shown. On the basis of researches carried out the author, develops algorithm of management gas the engine of internal combustion on various modes of his work in view of joint work of all elements gas of the equipment and engine.

Difficulties of optimization of a power-plant and complexind onboard equipment are connected with dimensions АМП and functional complexity of accessories. To the greatest degree they are shown at the small sizes. At the same time modern technologies allow to create tiny powerful processors.