The work is aimed at creation of high-efficiency heat regenerators of gas turbine units (GTU) of the gas transportation system of Ukraine. It is proposed to use highly effective heat exchange surfaces from the tubes of the spiral corrugated profile with high heat and aerodynamic characteristics for heat regenerators GTU, which will ensure a reduction of mass-dimensions by 30- 40% in comparison with heat exchangers made of smooth round tubes and an increase in the KPD GTU from 18-25% to 38-41%.
New substances and materials
Conditions of forming of impulse electron beam in power triode high-voltage glow discharge electron gun with using low-voltage additional discharge are investigated theoretically and experimentally. By using simulation technique basic geometrical and energetic beam parameters with taking into account thermodynamic parameters of anode plasma are defined. Particularities of transporting and scanning of formed electron beam are also theoretically investigated.
The design of the 2-axis Sun angular coordinates determination device based on the
monocrystalline silicon and on the nanostructured silicon films have been developed.
Calculations of the design parameters of the sensors are given taking into account the linearization of the output characteristic based on the factors of the incident power loss with the incidence light angle increasing and the incidence angle dependence of the light spot displacement.
For the first time there were developed and researched dampening solutions having anti-bacterial effects, that provide normal quality indicators such as optical density on the imprint in range of 0,9-1,5±0,05-0,10, color deviations in range of 4-5, dot gain in range of 18-25 % of raster element on the imprint; and that provide lowering isopropanol alcohol contain down to 9-10 %.
Applied a comprehensive approach to modeling various stages of the process of extrusion - forming and cooling products to the changing rheology and melt viscoelastic effects in it, that affect the final product configuration. The methodological approach allows the numerical simulation of the formation of products from polymeric materials, design extrusion-forming equipment based viscoelastic deformation effects of products and make adjustments to the design and process parameters to achieve the form of products, more relevant given.
A study and development of methodological support structural monitoring of the technical state of metallic structural elements of complex spatial objects are carried out, the technical implementation monitoring system based on the concept of Structural Health Monitoring in mock sample is made. The simulation and physical models of complex spatial diagnostic object – the tank for storage of hazardous substances are given, the adequacy of models is confirmed.
The technology of manufacturing of ceramic and metal superstrength composites (40 GPa compressive strength) superhard (30 GPa) reinforced materials based on boron carbide and boride of titanium or aluminum, nanostructured B6O by hot pressing. It is established that changing technological parameters of hot pressing allows controlling chemical, phase composition and structure (grain size, the geometric dimensions of the reinforcing component).
Theoretical studies of static and dynamic characteristics of the synthesized with the use of genetic-morphological approach high-speed spindle assembles for Electromechanical actuator clamping, tool clamping chuck.
Experimental studies of a prototype of a self-acting motor-spindle gear screw-nut, the results of which revised technical documentation. Developed recommendations of improvement of spindle assemblies and clamping mechanisms for multi-axis machines of new generation. Directions of further research have discribed.