Showing papers in "Journal of Engineering Physics in 1969"
TL;DR: In this paper, the results of an experimental investigation of the thermal resistance of contacts with coatings and linings of soft metals (silver, copper) at compressive stresses of up to 56 ·105 N/m2 over a temperature range of 250 −600°C were presented.
Abstract: The article presents the results of an experimental investigation of the thermal resistance of contacts with coatings and linings of soft metals (silver, copper) at compressive stresses of up to 56 ·105 N/m2 over a temperature range of 250–600°C. The specimens were made of different kinds of stainless steel or of a molybdenum alloy.
28 citations
TL;DR: In this article, an analytical study of the effect of a gas stream on the wave flow characteristics of thin layers of a viscous liquid moving over a vertical surface was performed. But the results of the investigations are compared with experimental data.
Abstract: An analytical study was undertaken of the effect of a gas stream on the wave flow characteristics of thin layers of a viscous liquid moving over a vertical surface. The results of the investigations are compared with experimental data.
11 citations
TL;DR: In this paper, a stable model of a granular or sintered material in a form with a second-order structure, with mutually penetrating components, is proposed, and the functional relationships for the calculation of the coefficients of generalized conductivity for the granular and sincered materials are derived.
Abstract: We propose a new stable model of a granular or sintered material in a form with a secondorder structure, with mutually penetrating components. We derive the functional relationships for the calculation of the coefficients of generalized conductivity for the granular and sintered materials.
10 citations
9 citations
TL;DR: In this paper, an experimental circuit for a Mach-Zehnder interferometer using a laser-like source is described. But the authors focus on the use of a laser as light source in interferometers.
Abstract: Applications of lasers as light sources in interferometers are analyzed. An experimental circuit is described. Interference patterns obtained with a Mach-Zehnder interferometer using a laser-like source are given.
9 citations
Abstract: Results are presented from an experimental study of the local and mean heat transfer rates when a rectangular jet enters a relatively short concave body of parabolic profile.
8 citations
TL;DR: In this paper, heat transfer data for parallel-flow staggered banks of tubes with s/d ratios of 1.16, 1.2, 2.34, 1 4, and 1.5 are examined.
Abstract: Heat-transfer data for parallel-flow staggered banks of tubes with s/d ratios of 1.16, 1.2, 1.34, 1.4, and 1.5 are examined. The experiments were performed with water at Reynolds numbers ranging from 2·103 to 7.104.
7 citations
7 citations
TL;DR: In this paper, the authors examined the stresses which arise in an elastic half-space when the surface of the latter is suddenly heated, bearing in mind the rates of expansion-wave propagation and the finite rate of heat propagation.
Abstract: We examine the stresses which arise in an elastic half-space when the surface of the latter is suddenly heated, bearing in mind the rates of expansion-wave propagation in an elastic medium and the finite rate of heat propagation.
6 citations
TL;DR: In this article, a generalized universal equation for the coefficient of completeness of burning in a cylindrical chamber as a function of the parameters of the geometry and modes of operation was derived.
Abstract: The turbulent diffusion combustion of a gas jet in a surrounding air flow bounded by the walls of a cylindrical chamber is studied theoretically and experimentally. A generalized universal equation is obtained for the coefficient of completeness of burning in the chamber as a function of the parameters of the geometry and modes of operation
6 citations
TL;DR: In this article, the results from the measurement of the coefficient for dielectric materials and thin films by the method of applying heat in pulses to a film thermometer in contact with the material being investigated were given.
Abstract: A description is given of an experimental setup and we present the results from the measurement of the coefficient\(\varepsilon = \sqrt \lambda c\gamma \) for dielectric materials and thin films by the method of applying heat in pulses to a film thermometer in contact with the material being investigated.
TL;DR: In this paper, the use of empirical power laws to calculate the diffusion coefficients of gases is considered and the method of similitude is used to obtain generalized relations which permit the calculation of the diffusion coefficient of gases in temperature ranges not covered by experiment.
Abstract: The use of empirical power laws to calculate the diffusion coefficients of gases is considered. The method of similitude is used to obtain generalized relations which permit the calculation of the diffusion coefficients of gases in temperature ranges not covered by experiment.
TL;DR: In this article, the heat conduction problem for a half-space and a plate with a time dependent coefficient of heat exchange was solved by the combined utilization of an operational and a successive approximations method.
Abstract: The heat conduction problem for a half-space and a plate with a time dependent coefficient of heat exchange is solved. The solution is obtained by the combined utilization of an operational and a successive approximations method.
TL;DR: In this paper, the authors proposed a dilatometry method of determining the coefficient of heat transfer between a surface and a medium, and demonstrated that the advantages of this method lies in its high accuracy and simplicity.
Abstract: We propose a dilatometry method of determining the coefficient of heat transfer between a surface and a medium. It is demonstrated that the advantages of this method lies in its high accuracy and simplicity. The use of dilatometry in a nontraditional research area makes it possible to substantially expand its sphere of application.
TL;DR: In this article, the problem of radial distribution of temperature in an infinite hollow cylinder is solved in the presence of heat exchange with the surrounding medium in the case in which the heat exchange coefficients are periodic functions of time.
Abstract: The problem of radial distribution of temperature in an infinite hollow cylinder is solved in the presence of heat exchange with the surrounding medium in the case in which the heat exchange coefficients are periodic functions of time
TL;DR: Sublimation of ice in a rarefied atmosphere at P = 1-1600 N/m2 was examined in this paper. But the results were limited to the case where the ice evaporation coefficients at different pressure in a vacuum chamber were determined.
Abstract: Sublimation of ice in a rarefied atmosphere at P=1-1600 N/m2 is examined. The ice evaporation coefficients at different pressure in a vacuum chamber are determined.
TL;DR: In this paper, the thermal conductivity of toluene by the heated filament method was measured in four measuring cells in the temperature range of 0 −130°C and the effect of gap thickness on the heat transfer in liquids was discussed.
Abstract: The procedure of measurements of the thermal conductivity of toluene by the heated filament method is described and the results measured in four measuring cells in the temperature range of 0–130°C are presented. The effect of gap thickness on the heat transfer in liquids is discussed.
TL;DR: The experimental apparatus used for determining the thermal conductivity of toluene at temperatures of 0 − 180°C and pressures of 0098 −490 MN/m2 is described in this article.
Abstract: The experimental apparatus used for determining the thermal conductivity of toluene at temperatures of 0–180°C and pressures of 0098-490 MN/m2 is described, and some of the results are presented Computing relationships providing an excellent representation of the experimental data are derived
TL;DR: In this article, the authors examine the heat transfer mechanism in vacuum-lam inated insulation and explain the relationship between the effective coefficient of thermal conductivity and the thickness of the insulation layer.
Abstract: We examine the heat-transfer mechanism in vacuum-lam inated insulation and explain the relationship between the effective coefficient of thermal conductivity and the thickness of the insulation layer.
TL;DR: In this article, a theoretical analysis for the flow pulsations in a steam-generating pipe is presented, which is based on computer integration of a system of equations in partial derivatives.
Abstract: A theoretical analysis is presented for the flow pulsations in a steam-generating pipe, which is based on computer integration of a system of equations in partial derivatives.
TL;DR: In this paper, experimental data on the transfer of heat in the initial and main segments of a cylindrical tube over a wide range of variation for the enthalpy factor ψh=0.08-0.8 and the Reynolds number (Red0=6.9.4).
Abstract: We present experimental data on the transfer of heat in the initial and main segments of a cylindrical tube over a wide range of variation for the enthalpy factor ψh=0.08-0.8 and the Reynolds number (Red0=6.9. 103-2.4.105). The experimental data are generalized with a single relationship.
TL;DR: In this article, the effect exerted by rotation on heat transfer in the initial segment of a tube in the case of turbulent gas flow was determined on the basis of theory of local modeling.
Abstract: On the basis of theory of local modeling we have determined the effect exerted by rotation on heat transfer in the initial segment of a tube in the case of turbulent gas flow. We have derived approximate working formulas which are compared with experimental data.
TL;DR: In this article, the results of an experimental investigation of high-frequency pressure pulsations developing during heat transfer to n-heptane with different flow speeds and pres-sures are presented.
Abstract: This article presents the results of an experimental investigation of high-frequency pressure pulsations developing during heat transfer to n-heptane with different flow speeds and pres-sures.
TL;DR: In this paper, the maximum, wave amplitudes are analyzed for a change in the spray density and in the length of the film path for a liquid flowing under the action of gravity on the outside surface of a vertical tube.
Abstract: The maximum, wave amplitudes are analyzed for a change in the spray density and in the length of the film path for a liquid flowing under the action of gravity on the outside surface of a vertical tube.
TL;DR: In this paper, a study of heat transfer and hydrodynamic drag in the turbulent flow of a gas through a channel formed by a series of flat nonsymmetric diffusers with a divergence angle of 12° and converging diffuser sections, for the interval Re =(10−80)·103.
Abstract: We present results from a study of heat transfer and hydrodynamic drag in the turbulent flow of a gas through a channel formed by a series of flat nonsymmetric diffusers with a divergence angle of 12° and a series of converging diffuser sections, for the interval Re =(10–80)·103.