Dynamics of a cylindrical shell with a collapsing elastic base under the action of a pressure wave

Antuf’ev, B. A.; Egorova, Olga; Rabinskiy, Lev N.

doi:10.13111/2066-8201.2019.11.s.3

Cited by 11 publications

(1 citation statement)

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“…It was found that there are delamination and folds of material passing into the body of the part in the area of the small end on some blanks. In order to reduce the likelihood of occurrence of these defects, the following technical measures have been implemented [1]- [3]:…”

Section: A Manufacturing Technology Of Model Rcnmentioning

confidence: 99%

Development of Manufacturing Technology of Nozzles from Composite Materials during Radiation Cooling

Sha¹,

Rabinskiy²,

Utkin³

2021

International Journal on Advanced Science, Engineering and Information Technology

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Carbon-carbon composite materials (CCCM) are a new class of structural materials designed to create light, durable, and space-based rigid structures for aerospace, hypersonic, gas turbine engines, parts of nozzle blocks, rocket combustion chambers, and transition trusses. They have the unique ability to maintain high strength and stiffness with 2500°C. For the manufacture of thermally stressed parts of nozzles, carbon fiber fabrics are used. Antioxidant coatings based on tantalum and silicon are applied to nozzles with adhesive (made based on tantalum carbide, which provides high mechanical strength of adhesion of erosion-resistant antioxidant coating with CCCM), antioxidant and erosion-resistant layers. To deposit a layer of tantalum carbide on CCCM, we used the technology of vacuum ion-plasma deposition of tantalum film followed by carbonization with carbon. As a result, an adhesive coating of tantalum carbide is formed on the surface of the packing. Obtaining an erosion-resistant antioxidant coating on the adhesion layer of tantalum carbide is obtained by applying a slip of silicon carbide powders and soot. The study of the performance of antioxidant and erosionresistant protective coating in high-temperature airflow was carried out on plasmatron (it is a plasma generator in which an electric current is used to form a plasma; for cooling it, channels washed by water are used). This article shows that the studied packings have a unique ability to maintain high strength and rigidity with 2500°C. There is the expediency of manufacturing such nozzles. The physical and mechanical characteristics of the material were determined.

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Section: A Manufacturing Technology Of Model Rcnmentioning

confidence: 99%

Development of Manufacturing Technology of Nozzles from Composite Materials during Radiation Cooling

Sha¹,

Rabinskiy²,

Utkin³

2021

International Journal on Advanced Science, Engineering and Information Technology

View full text Add to dashboard Cite

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Geometric method for assessing the shadowing of objects in solar power engineering

Markin

2020

INCAS BULLETIN

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This paper describes a geometric model for assessing the effective area of solar panels with regard to their shadowing when the object is illuminated by the solar flow from a given direction. Using energy methods, the flow density, the irradiation created by it, and the exposure in radiant or effective units of measurement were determined. Both physical and mathematical formulation of the problem of assessing the energy efficiency of solar panels using the method of geometric modeling are described. To evaluate energy efficiency, a voxel geometric model was selected that discretizes the computational space. A significant difference in the developed voxel geometric model is that it is multivalued, i.e. uses not a 2-digit, but a 4-digit code. Such ambiguity allows the decisive algorithm to quickly “figure out” the origin of the shadow source when calculating the total effective area of solar panels. The described software implementation of the geometric model, graphical shell, and model verification results can be used in the optimization system for designing spacecraft and other solar energy facilities.

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Mathematical modeling of coupled heat transfer on cooled gas turbine blades

Sun¹,

Колесник

Kuznetsova

2020

INCAS BULLETIN

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The paper presents a physico-mathematical model for determining the heat transfer parameters between viscous gasdynamic flotations and cooled gas turbine blades made using the technology of composite permeable membranes (CPM). The mathematical model includes equations of dynamic and thermal boundary layers taking into account injection, three-dimensional transient heat conduction in CPM cooled frames, complex hydraulic flow and cooling inside the channels of a cooled blade with air taken from the power plant compressor. A complex problem was solved to determine the thermal state of microrocket engines, where a method was proposed for immersing a multiply-connected domain in a region of the simplest form. A new economical, absolutely stable method is proposed for numerically solving of spatial nonstationary heat transfer problems in multiply-connected domains. The results obtained showed greater cooling efficiency at lower cooling medium costs.

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Dynamics of a cylindrical shell with a collapsing elastic base under the action of a pressure wave

Cited by 11 publications

References 0 publications

Development of Manufacturing Technology of Nozzles from Composite Materials during Radiation Cooling

Development of Manufacturing Technology of Nozzles from Composite Materials during Radiation Cooling

Geometric method for assessing the shadowing of objects in solar power engineering

Mathematical modeling of coupled heat transfer on cooled gas turbine blades

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