Vol 59, No 1 (2016)

Cases of substantial difference between working and initial temperatures are examined. Peculiarities of the deformation process at the sub- and post-critical temperatures and liquid pressure are revealed.

For an interception strategy of a removable target by a return space vehicle (RSV), we propose a structure of the control law by the aerodynamic efficiency that determines a chain of the three standard trajectories: nosing-up–free flight–nosing-down. A solution of the terminal problem is to determine numerical values of the control parameters that define moments to switch the RSV flight from one standard trajectory to another.

The issues of constructing the mathematical models of airship motion, dynamics of longitudinal and lateral motion, existence and analysis of stationary motions, disturbed motions, and longitudinal and lateral stability are examined.

In this paper, we examine the aerodynamic characteristics of models of rectangular wings with double-slotted flap at conditions of ground proximity near the screen. We determined a number of parameters that made it possible to represent the aerodynamic characteristics of high-lift systems in generalized and parametric form. Also determined is the dependence of the effective aspect ratio increment on the relative height.

The paper describes the development of NK-family engine shrouded turbine blades. Weight optimization principles are formulated with account for strength and manufacturability limits.

A technique of design analysis of the relative density of core and face sheets (skin) for rational sandwich structure with truss core is proposed. The examples of calculating the rational angle of truss core slope and design values of sandwich structure density are presented.

A concept of monitoring for material properties with residual life estimation of rotor blades for gas turbine engines is proposed. The structure of on-board control and conditionmonitoring system based on the intelligent pyrometer module with the algorithm for calculating the residual life of turbine rotor blades is described.

Some results of investigating the geometrical and jet impact on secondary flows and thermal state of cooled inter-profile end surfaces of gas turbine engine nozzles have been set forth under different secondary flows interaction degree in a blade channel.

Experimental results of a study of pressure recovery in a planar diffuser under imposed pulsations of the air flowrate are presented. The data is obtained in a wide range of imposed pulsation frequencies. Features of distributions of the mean pressure and the pressure drop in the diffuser are described.

The flow of viscous incompressible fluid in the lateral rotation cavity of centrifugal pump is considered. The finite-difference equations have been developed for numerical simulation of the flow in view of shear stresses in a spatial boundary layer that allow a disk resistance moment to be defined. The numerical results are presented.

In this paper, a starter-generator (SG) integrated into an aircraft gas turbine engine (GTE) is presented. Operating modes of the SG under different temperature conditions are described.

The purpose of this work is to form transparent parametric patterns for 5-axis machining of blade rings of GTE blisks. The algorithms were developed for geometry correction of control surfaces by the results of measuring the geometry of the airfoil blade processed with the use of smoothing algorithms based on the bicubic spline interpolation.

In this paper, we investigate the electrical conductivity of different semi-finished products made of aluminum alloys. The influence of electrical conductivity value on the mechanical and corrosive properties of aluminum semi-finished products is studied.

The peculiarities of developing the control actuators on the basis of combined electromechanical modules are examined. A technique of calculating and designing the power contour of the control actuator for different purposes in the form of electromechanical module, is presented.

In this paper, the finite element analysis of the stress-strain state for cylindrical structures is discussed. In this case, various fundamental hypotheses can be used in the framework of a model that is of interest for design and optimization. Numerical examples are presented to evaluate the possibilities of this model.