Kinematics of the Solid Particle Accelerated by a Flow of Gas in a Supersonic Nozzle and Work Hardening of the Processed Surface

Dolmatov, A. I.; Сергеев, С. В.; Kurin, М. О.; Voronko, Vitalii; Loza, T. V.

doi:10.15407/mfint.37.07.0871

Cited by 11 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At some distance from the closed end of the barrel between the sections, X1 and X2 are suspended particles of powder with a bulk concentration α 2 . The detonation wave is formed and propagates into the mixture as a result of the explosion initiation near the closed end of the barrel (Dolmatov et al, 2015). Upon reaching the contact limit, the detonation wave turns into a shock wave moving through the inert gas (Dolmatov et al, 2014).…”

Section: Two-phase Flow Simulationmentioning

confidence: 99%

Technology for Restoration and Repair of Aircraft Engine Parts

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Section: Two-phase Flow Simulationmentioning

confidence: 99%

Technology for Restoration and Repair of Aircraft Engine Parts

et al. 2021

View full text Add to dashboard Cite

show abstract

“…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.

View full text Add to dashboard Cite

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

show abstract