Dynamics of shell with destructive heat-protective coating under running load

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

doi:10.13111/2066-8201.2019.11.s.2

Cited by 9 publications

(2 citation statements)

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“…As an example, aluminum σ = 0.21ꞏ10 -24 cm 2 , A 0 = 6.022ꞏ10 23 mol -1 density ρ = 2.7 g/cm 3 , А = 27 dalton was considered. Substituting these values in Equation 2,…”

Section: Methodsmentioning

confidence: 99%

Study of the Radiation Situation in Moscow by Investigating Elastoplastic Bodies in a Neutron Flux Taking Into Account Thermal Effects

Pronina¹,

Tushavina²,

Старовойтов³

2020

PTQ

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This article discusses the study of the background radiation level in Moscow and its impact on the environment. To identify the radiological impact on living conditions, a study of the effects of fast neutrons on infrastructure and biological objects was made. Large-scale research organizations carrying out technological development, scientific and materials research using nuclear materials in the city of Moscow and the region are considered. A system of environment radiation monitoring, covering an area of more than 1091 km², was examined in detail. A radioecological survey conducted in the Troitsky and Novomoskovsky administrative districts was analyzed to identify and describe the radiation situation. An analysis of background radiation in Moscow shows that the values of the controlled parameters of radioactive pollution of environmental objects are within the long-term fluctuations of the technogenic background of the capital. In this case, various thermal effects arise caused by radiation exposure to solids. The study of infrastructure and biological objects is carried out based on the determination of effects, because of which the elastic and mainly plastic characteristics of substances exposed to neutron irradiation and thermal effects change. Here, the main essential factors are radiation hardening of the material (increase in yield stress) and radiation swelling (increase in volumetric strain).

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“…As an example, aluminum σ = 0.21ꞏ10 -24 cm 2 , A 0 = 6.022ꞏ10 23 mol -1 density ρ = 2.7 g/cm 3 , А = 27 dalton was considered. Substituting these values in Equation 2,…”

Section: Methodsmentioning

confidence: 99%

Study of the Radiation Situation in Moscow by Investigating Elastoplastic Bodies in a Neutron Flux Taking Into Account Thermal Effects

Pronina¹,

Tushavina²,

Старовойтов³

2020

PTQ

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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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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 shell with destructive heat-protective coating under running load

Cited by 9 publications

References 0 publications

Study of the Radiation Situation in Moscow by Investigating Elastoplastic Bodies in a Neutron Flux Taking Into Account Thermal Effects

Study of the Radiation Situation in Moscow by Investigating Elastoplastic Bodies in a Neutron Flux Taking Into Account Thermal Effects

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

Mathematical modeling of coupled heat transfer on cooled gas turbine blades

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