Вестник УГАТУ

Description of the behavior of an Inconel 718 alloy disk using a multi-level physically oriented constitutive model

2025-09-22T03:22:38+00:00

The developed modifications of the multilevel physically-based constitutive model have been applied to describe separate regions of a gas turbine engine disk made of the heat-resistant nickel-based alloy Inconel 718. A Reuss hypothesis-based modification was developed and numerically implemented to describe competing diffusion and dislocation creep mechanisms. To determine the yield strength, a Voigt hypothesis-based modification was employed, aimed at describing inelastic deformation realized by dislocation motion. The obtained results confirm the applicability of these model modifications for describing the macro-properties of the alloy, which depend on the structural state. In the future, this approach will allow the model to be used to optimize the distribution of the material's structural characteristics across the product, thereby achieving the best operational properties.

doi 10.54708/19926502_2025_2921083

Numerical study of the pump power controller

2025-09-22T05:25:16+00:00

The scientific article is devoted to the development of a mathematical model of the pump power regulator. Based on the results of numerical modeling, static and dynamic characteristics of the power regulator are obtained, and a parametric analysis of the influence of the main design and operating parameters on the quality characteristics of the hydraulic system is performed.

doi 10.54708/19926502_2025_29210820

Investigation of the course of gas-dispersed flows in dust protection devices of gas turbine engines

2025-09-22T05:51:23+00:00

The article considers the actual problem of wear of compressor blades due to the ingress of dispersed particles into the air intakes of helicopter gas turbine engines. The degree of impact of erosion on the characteristics of engines depends on the concentration and mass of dust trapped in the engine during operation, as well as on its physicochemical parameters. To investigate the process of air purification in a dustproof device, the physicochemical parameters of the particles were analyzed. The experimental values of the drag coefficient for one-dimensional movement of particles are determined. The relationship between the soaring velocity and the concentration of solid particles of various sizes during their movement in a gas flow is demonstrated. The dependence of the shape coefficient of dispersed particles on the equivalent diameter and concentration of the
solid phase is identified. The results obtained can be used in the projecting and calculations of dust protection devices of gas turbine engines

doi 10.54708/19926502_2025_29210828

Analysis of the GTU performance parameters depending on the type of fuel used

2025-09-22T07:23:18+00:00

The article presents the construction and basic calculation of gas turbine installations, for further calculation of the same installations on various fuel mixtures. Calculation and analysis of GTU operation parameters depending on the content of hydrogen and methane. The dependence of efficiency on the hydrogen content in the fuel mixture with methane is shown. The possibility and prospect of using various fuel mixtures in the operation of GTU.

doi 10.54708/19926502_2025_29210837

Influence of the particle separator on the helicopter engine parameters

2025-09-22T07:32:32+00:00

Aircraft Engine Particle Separator (EAPS) does play a key role in the reliable operation of aircraft gas turbine engines, especially in environments where high levels of dust and sand are present. A mushroom device, as one type of EAPS, utilizes its geometry to create centrifugal forces that help separate dust particles from the airflow to the engine. The gas dynamic calculations performed using ANSYS software provide a detailed understanding of the airflow behavior when using a mushroom EAPS. The results showing insignificant influence on the pressure and airflow at the engine inlet confirm the efficiency of the device design.

doi 10.54708/19926502_2025_29210845

Simulation of the operating process of the combustion chamber of the gas turbine unit using an optimized global combustion mechanism

2025-09-22T07:43:21+00:00

stract: The article presents an algorithm for optimizing combustion mechanisms, according to which three-stage methane combustion mechanism was optimized for operation under conditions of lean combustion of a premixed mixture. This mechanism was used to model the flame tube of the Siemens SGT-100 combustion chamber. The obtained modeling results were compared with experimental data on the flame and swirling flow parameters. For the proposed approach in combination with Eddy Dissipation Concept combustion model with various methods for calculation the coefficient of the latter, good agreement was obtained with experimental data in the main combustion products, flame temperature and carbon monoxide emission. The possibility of further improving for the pre-exponential factor of individual reactions of the combustion mechanism is shown

doi 10.54708/19926502_2025_29210853

The influence of technological cutting conditions on the formation of SRS during the pro-cessing of difficult-to-cut materials

2025-09-22T08:01:06+00:00

This paper presents a study of the influence of cutting tool geometric parameters and cutting modes on the formation of surface residual stress values. These studies were carried out using computer modeling.

doi 10.54708/19926502_2025_29210867

Multi-Agent Approach of Software Design in Cyber-Physical Systems

2025-09-22T08:11:42+00:00

The paper considers the problem of software organization in cyber-physical systems (CPS). A concept is proposed according to which the main computing processes in CPS are receiving and processing streaming data. A mathematical model of distributed processing of streaming data in cyber-physical systems is proposed, which reflects the main requirements for CPS software: flexibility and survivability. The proposed model is implemented in the form of a software architecture that allows to significantly increase the efficiency of the software life cycle for CPS.

doi 10.54708/19926502_2025_29210877

Study of the influence of cathode current on the properties of wear-resistant coatings based on TiB2-AlSiY

2025-09-22T11:21:43+00:00

The article describes the study of the properties of wear-resistant coatings based on the TiB2-AlSiY system obtained using a vacuum-arc deposition unit. During deposition, modes were used that included the introduction of various alloying elements into the composition, as well as various currents on the cathode in order to identify changes in the properties of the resulting coatings. After deposition, such characteristics as phase composition and microhardness of the coatings were analyzed, the thickness was measured, tests were performed with cutting path measurements to assessthe wear of the coatings, and optical microscopy was carried out. The resulting coatings can be used
in mechanical engineering to improve the performance characteristics of cutting tools.

doi 10.54708/19926502_2025_29210889