Investigation of the Influence of Inertia Forces on the Adhesion of the Coating to the Outer Surface of Bodies of Revolution during Thermal Spraying

2021 ◽  
Vol 316 ◽  
pp. 726-731
Author(s):  
Alexey Yu. Rodichev ◽  
Roman N. Polyakov ◽  
Andrey V. Gorin
Keyword(s):  
Adhesion Strength ◽  
Outer Surface ◽  
External Surface ◽  
Thermal Spraying ◽  
Inertial Forces ◽  
Body Of Revolution ◽  
Mathematical Apparatus ◽  
Bodies Of Revolution ◽  
Steel Base ◽  
Inertia Forces

The article presents the results of a study of the influence of inertial forces on the adhesion of the coating to the external surface of a body of revolution during thermal spraying. A mathematical apparatus is proposed for calculating the inertia forces, acting on a particle of coating, applied to the outer surface of the bodies of revolution. As a result, dependencies have been revealed that allow predicting the adhesion strength of the coating with the steel base during thermal spraying.

THEORETICAL BASES OF CALCULATION FORCES INERTIA WHEN DRAWING A COVER ON AN EXTERNAL SURFACEBODY OF ROTATION

2020 ◽  
Vol 2 ◽  
pp. 109-113
Author(s):  
A.Yu. RODICHEV ◽  
A.V. PANICHKIN ◽  
E.N. GRIADYNOVA ◽  
V.A. TOKMAKOVA
Keyword(s):  
Adhesion Strength ◽  
Outer Surface ◽  
Thermal Spraying ◽  
Mathematical Apparatus ◽  
Bodies Of Revolution ◽  
Steel Base ◽  
Inertia Forces

The article presents the results of a study of the influence of inertia forces on the adhesion of a coating to the outer surface of bodies of revolution during thermal spraying. A mathematical apparatus is proposed for calculating the inertia forces acting on a coating particle when rotation bodies are applied to the outer surface. As a result, dependences are revealed that make it possible to predict the adhesion strength of the coating to the steel base during thermal spraying.

Investigation of the Influence of Kinematic and Geometric Parameters of the Thermo- Sprayer Location on the Adhesion Strength of Anti-Friction Coating

2020 ◽  
Vol 299 ◽  
pp. 902-907
Author(s):  
Alexey Yu. Rodichev ◽  
Elena N. Gryadynova ◽  
Andrey V. Gorin
Keyword(s):  
Bond Strength ◽  
Adhesion Strength ◽  
Experimental Studies ◽  
Geometric Parameters ◽  
Flame Spraying ◽  
Mathematical Apparatus ◽  
Steel Base ◽  
Gas Flame ◽  
Inertia Forces

The article presents the results of the influence of the kinematic and geometric parameters of the thermos-sprayer location on the adhesion strength of the anti-friction coating. A mathematical apparatus for calculating the inertia forces acting on an anti-friction coating particle is proposed. The results of a number of experimental studies confirming the convergence of theoretical positions are presented. As a result, dependencies have been revealed that make it possible to predict the bond strength of the anti-friction coating with the steel base during gas-flame spraying.

Steady rotation of a body of revolution in a conducting fluid

1969 ◽  
Vol 65 (1) ◽  
pp. 329-350 ◽  
Author(s):  
R. T. Waechter
Keyword(s):  
Magnetic Reynolds Number ◽  
Conducting Fluid ◽  
Body Of Revolution ◽  
Bodies Of Revolution ◽  
Electrically Conducting ◽  
Reduced Equations ◽  
Electrically Conducting Fluid ◽  
Weakly Conducting ◽  
Steady Rotation ◽  
Inertia Forces

We investigate the steady rotation of an insulating body of revolution in an unbounded electrically conducting fluid permeated by a uniform axial applied magnetic field. The assumptions of a small magnetic Reynolds number (Rm ≪ 1, i.e. the weakly conducting situation) and negligible inertia forces compared with the magnetic forces (R/M2 ≪ 1) permit us to suppress the inflow at the poles and outflow at the equator, which normally occurs for a non-conducting viscous fluid ((12), pp. 436–439). Thus in the case of the sphere, we find an exact solution of the reduced equations in terms of an infinite series of Legendre polynomials of order 1 with coefficients which are the ratios of modified spherical Bessel functions. This is the canonical problem by which results for arbitrary bodies of revolution are obtained.

INFLUENCE OF TECHNOLOGICAL FACTORSFOR THE QUALITY

2021 ◽  
Vol 73 (2) ◽  
pp. 32-39
Author(s):  
A.N. NOVIKOV ◽  
◽  
A.YU. RODICHEV ◽  
A.V. GORIN ◽  
M.A. TOKMAKOVA ◽  
...  
Keyword(s):  
Adhesion Strength ◽  
Film Coating ◽  
Motor Vehicles ◽  
Antifriction Coating ◽  
Maintenance And Repair ◽  
Technological Factors ◽  
Antifriction Coatings ◽  
Steel Base

The article contains a study of the influence of technological factors on the formation of a film antifriction coating when applied to parts of cars and cars. The article presents a methodology and results of calculating the adhesion strength of a film coating with a steel base. The equipment used to determine the adhesion strength is presented. The technique of using the specified equipment is described. The dependence of the adhesion strength on the modes of film coating is established and described. Recommendations have been developed for the selection and method of applying film antifriction coatings during the maintenance and repair of motor vehicles.

A System to Measure Turbulent Lengthscales on Submerged Bodies of Revolution

2017 ◽  
Author(s):  
Christopher J. Chesnakas ◽  
Daniel R. Cadel
Keyword(s):  
Laser Doppler Velocimetry ◽  
Arrival Time ◽  
Noise Removal ◽  
The Body ◽  
Doppler Velocimetry ◽  
Body Of Revolution ◽  
Sampled Data ◽  
Bodies Of Revolution ◽  
Submerged Body ◽  
Cross Correlations

A system has been developed to measure the turbulent lengthscales in the flow about a submerged body of revolution. The system consists of two Laser Doppler Velocimetry (LDV) probes mounted inside the body of revolution with the beams projected outside of the body through conformal windows. The measurement volumes of the two probes can be independently positioned within a plane perpendicular to the body axis. The probes are used to measure velocity time series at various spacings in the flow field. Auto- and cross-correlations are computed for each measurement pair, from which integral lengthscales are then found. Measurements are compared to canonical data from a turbulent free shear jet. In this paper, the system is described and its theory of operation detailed. Methods of computing the velocity correlations from the random-arrival-time LDV measurements are presented, and a new noise-removal scheme for non-uniformly sampled data is introduced. Six methods for calculating the integral lengthscale from autocorrelation data are reviewed, and the results discussed for the present jet data measured with LDV.

Approximate Solutions of Compressible Flows Past Bodies of Revolution by Variational Method

1951 ◽  
Vol 18 (3) ◽  
pp. 260-266
Author(s):  
Chi-Teh Wang ◽  
Socrates De Los Santos
Keyword(s):  
Variational Method ◽  
Arbitrary Shape ◽  
Compressible Flows ◽  
Direct Method ◽  
Approximate Solutions ◽  
Body Of Revolution ◽  
Approximate Methods ◽  
Bodies Of Revolution ◽  
Numerical Examples ◽  
Ellipsoid Of Revolution

Abstract Using the direct method of Rayleigh-Ritz in the calculus of variations, the problem of steady irrotational compressible flow past a body of revolution of arbitrary shape is formulated. In order to compare with the analytical solutions obtained by other investigators, two numerical examples have been carried out, namely, compressible flows past a sphere, and an ellipsoid of revolution. The results are found to be in excellent agreement with those computed by other approximate methods.

A Note on the Resistance of Bodies of Revolution and Ship Forms

1974 ◽  
Vol 18 (03) ◽  
pp. 153-168
Author(s):  
N. Matheson ◽  
P. N. Joubert
Keyword(s):  
Boundary Layer ◽  
Reasonable Agreement ◽  
The Body ◽  
Experimental Results ◽  
Body Of Revolution ◽  
Bodies Of Revolution ◽  
Boundary Layer Development ◽  
Layer Development

A simple so-called 'equivalent' body of revolution is proposed for reflex ship forms in an attempt to simplify calculation of the boundary layer over a ship's hull when there is no wavemaking. How­ever, exhaustive testing of one body of revolution did not produce a favorable comparison with re­sults for the corresponding reflex model. Gadd's recently proposed theory was used to calculate the boundary-layer development over the body of revolution. Reasonable agreement was obtained between the calculated and experimental results.

Balancing the Moments of a VR5 Engine Taking into Account a Desaxial Crank Mechanism and Cylinder Camber Angle

2020 ◽  
pp. 41-49
Author(s):  
N.D. Chainov ◽  
P.R. Vallejo Maldonado
Keyword(s):  
Relative Displacement ◽  
Working Fluid ◽  
Inertial Forces ◽  
Structural Elements ◽  
Connecting Rod ◽  
Cylinder Axis ◽  
Acoustic Characteristics ◽  
Camber Angle ◽  
Inertia Forces ◽  
Crank Mechanism

Automobile piston engines with a desaxial crank mechanism are characterized by increased vibration activity associated with a cyclic change in the pressure of the working fluid in the cylinders and inertial forces associated with the reciprocating and rotational movement of the crank mechanism moving masses. Properties reflecting the consumer properties of the engine, including acoustic characteristics, are largely determined by the level of vibration of the structural elements of the desaxial crank mechanism and, first of all, by the balance of inertial forces during operation. The article discusses balancing of five-cylinder four-stroke VR type engines with a desaxial crank mechanism and uniform flash alternation. The authors introduce formulas that can be used to determine and analyze moments of the inertia forces of the reciprocating and rotating masses arising in VR5 engines at the set values of the cylinder camber angle, the ratio of the crank radius to the connecting rod length and the relative displacement of the cylinder axis. A method of balancing the moments of inertia forces of the reciprocating and rotating masses is proposed.

Ultrasound Examination – Mean of Analysis of the Layers Properties Deposited Through Different Thermal Spraying Methods

2012 ◽  
Vol 186 ◽  
pp. 169-175 ◽  
Author(s):  
Dand Botez Sorin Constantin ◽  
Gabriel Marius Dumitru ◽  
Bogdan Dumitru ◽  
Dina Viorel-Cristian
Keyword(s):  
Comparative Study ◽  
Adhesion Strength ◽  
Ultrasound Examination ◽  
Thermal Spraying ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Flame Spraying ◽  
Arc Spraying ◽  
Surface Adhesion ◽  
Better Than

Reconditioning materials by thermal spray metalizing is a rapidly growing field. In this paper we conducted a comparative study of three methods of metal deposition: flame spraying, atmospheric plasma spraying, arc spraying. This was done considering two of the properties of layers obtained in metalizing process: surface adhesion strength and porosity. The result of ultrasound examination by immersion shows that adhesion obtained through APS method is better than the others two obtained through AS and FS methods.

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