Some problems in measuring thermal conductivity using the coaxial cylinders method. II

The results of an investigation of the thermal conductivity of five liquids using an apparatus based on the absolute coaxial cylinders method are presented. The measurements are made using three different measuring gaps. Procedural problems in measuring thermal conductivity are considered.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 33, No. 2, pp. 275–279, August, 1977.     

Dynamic viscosities of mixtures of n-butyraldehyde and isobutyraldehyde over wide ranges in the state parameters

Dynamic-viscosity measurements are reported for liquid mixtures in the system formed by n-butyraldehyde and isobutyraldehyde.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 48, No. 2, pp. 321–322, February, 1985.     

Properties of silicon solar cells with a holographic concentrator

The processes of photovoltaic conversion in the silicon solar cells (SE) with р ⁺–n–n ⁺ structure have been studied while lighting with the holographic concentrator. The dependences of the open-circuit voltages, short circuit current of the solar cell on the lighting level in the range of the solar flux concentration 1–10 units without special cooling.     

Compression of cavitation bubble in viscous liquid

This work is devoted to studying the compression of cavitation bubbles by viscous liquid and the rate of steam compression in it within a wide range of Reynolds numbers. The influence of heat conductivity in bubble, the compressibility of liquid and evaporation/condensation on the surface of the bubble have been studied. It has been shown that the maximal pressure inside of the bubble increases sharply in a small neighborhood of some critical value with growth in the Reynolds number. This critical value is close to the one established by Zababakhin, which separates regimes of the bubble collapse in incompressible liquid for finite and infinite times.     

Increase in the filtration capacity of the bottomhole zone in the reservoir by wave impact for well stimulation

The possibility of well stimulation via wave impact has been studied. The effect of an increase in the filtration capacity of the bottomhole zone in a reservoir observed during treatment with high-frequency waves has been surveyed.     

Problems of machine mechanics and technology. Prospects of the development of the Blagonravov Institute of Engineering Science

This article presents materials from the presentation made by researchers at the scientific conference of the Institute of Engineering Science (IES RAS). Here, only fragments of nonlinear wave mechanics and wave technologies that give a general understanding are presented very briefly. The second part of the article (which will be published in the next edition) will be devoted to new trends in technology and machine mechanics based on the results of nonlinear wave mechanics and technology, as well as on conventional research areas developed in various subdivisions of Blagonravov IES RAS.     

Dielectric properties of composite magnetic dielectrics made using wave technology

The results of studying dielectric properties of the composite magnetic dielectric by theoretical calculations and experiments are given. The calculated values of the relative permittivity and loss tangent agree well with the experimental data obtained using the capacitance method.