Modelling of Gas Flow with Solid Particles in a Short Nozzle

Dolmatov, A. I.; Bilchuk, O. V.

doi:10.15407/mfint.40.09.1257

Cited by 4 publications

(2 citation statements)

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“…Repair and restoration of worn parts also require the correct determination of the technical condition of the part, the cause of damage, to make the right decision to eliminate the identified defects and failures, as well as to provide high-quality repair work (Dolmatov & Bilchuk, 2018). Operational characteristics of details and components of aircraft engines essentially depend on characteristics of surface quality and a near-surface layer.…”

Section: Literature Reviewmentioning

confidence: 99%

Technology for Restoration and Repair of Aircraft Engine Parts

et al. 2021

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Problems of increasing the service life of compressor blades of aircraft gas turbine engines using detonation spraying technology are considered. The simulation of the parameters of the velocity and temperature of the particles of the sprayed material in the barrel of the detonation unit and in the flooded space to the substrate was carried out, followed by the choice of the optimal technological parameters of the spraying process. The control system of the detonation unit has been modernized. An experiment was carried out on the deposition of the Al2O3 coatings on the samples of a substrate made of titanium alloy VT3-1. Based on the results of the experiment, technological recommendations were developed concerning both the parameters of the spraying process and the parameters of the preparation of the substrate surface before spraying. The equipment for brazing the blades of the guide vanes is described and a device for spraying coatings on the end surfaces of the compressor blades is proposed. Thus, a complex technology has been developed for restoring the end surfaces of titanium alloy compressor blades by deposition of Al2O3 coatings.

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Section: Literature Reviewmentioning

confidence: 99%

Technology for Restoration and Repair of Aircraft Engine Parts

et al. 2021

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“…A numerical simulation of two-phase flow in low-pressure cold spraying supersonic nozzle is described in enough detail in [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Gas Flow with Nanocomposite Carbon-Containing Powders in Supersonic Nozzle

Shorinov¹,

Polyvianyi²

2022

Metallofiz. Noveishie Tekhnol.

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Modern technologies for producing carbon nanostructures are based on many years of experience in the development of coating methods. The latest trends in the formation of carbon nanostructures are associated with complex technological processes of physical and technical treatment, when microstructures are obtained based on traditional methods, which are then completely or partially modified into nanostructures. In this case, the possibility of the formation of a part of nanostructures in a gas flow is considered in order to use them as islands of growth of other nanostructures on the treated surface. The conditions for formation of the specified structures are characterized by the energy state of particles, physical and mechanical properties of particles and substrate materials. The paper presents the results of numerical simulation for determination of velocity and temperature of nanocomposite metalmatrix powder particles in a supersonic nozzle. The necessity to determine parameters of solid particles of powder in a two-phase supersonic flow is determined. Particles velocity and temperature are the crucial parameters which allow for formation of coatings and impact their physical and mechanical properties. The contour plots of velocity and temperature distribution in the nozzle and free space from the nozzle exit to the substrate are obtained. Coating application and its characteristics are considered when selecting coating materials. The numerical simulation is performed for the particles of boron carbide (B4C) and nickel (Ni) powders. The dependence of velocity and

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