Characteristics of heat transfer in the region of gas injection into a supersonic high-temperature gas stream

An experimental study was made of the heat transfer distribution during gas injection into the supersonic region of a Laval nozzle. The dimensionless parameters governing this process have been established as a result.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 24, No. 5, pp. 790–797, May, 1973.     

Thermoelectric method of measuring velocity fluctuations in a gas stream

A method is described of measuring velocity fluctuations by using a thermocouple connected to a rapid response temperature-measuring instrument. It is shown that the method permits investigation of velocity fluctuations in a high-temperature gas stream.     

Control of high-temperature nitrocementation through a continuous change in the carbon potential and temperature in a gas furnace

The feasibility of automatic control of nitrocementation through a continuous change in the carbon potential and temperature of the environment has been studied by means of a mathematical experiment on the computer.M. V. Lomonosov Moscow State University. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 65, No. 2, pp. 214–222, August, 1993.     

Integral method of calculating a turbulent boundary layer in a uniform gas stream

A previously developed integral method for calculating a turbulent boundary layer with pressure gradient and blowing [1] has been generalized to the case of flow with heat transfer.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 34, No. 3, pp. 500–506, March, 1978.     

Asymmetry of the profile of temperature waves propagating through a packing under the action of a gas stream

The behavior of temperature waves of different amplitude in a fine-grained packing is examined. It is established that the asymmetry of the temperature wave profile is different for metals and materials with adsorption properties.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 15, No. 5, pp. 875–881, November, 1968.     

Experimental determination of the temperature dependence of the superfluid electron density in high-temperature superconductors

It is established that the temperature dependence of the effective density of superfluid electrons for Cu(1) lattice sites calculated within the framework of the Bardeen-Cooper-Schriffer (BCS) theory is at variance with the experimental data obtained using Mössbauer spectroscopy for YBa₂Cu₃O₇, YBa₂Cu₄O₈, Tl₂Ba₂Ca₂Cu₃O₁₀, Bi₂Sr₂Ca₂Cu₃O₁₀, and HgBa₂Ca₂Cu₃O₈ compounds. At the same time, the experimental data for Cu(2) lattice sites are in satisfactory agreement with BCS results.     

A peculiarity in measuring the disperse drop composition in a two-phase stream

The paradox of repeated drop breakup in a two-phase stream is considered. A method of measuring their slip coefficients is proposed.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 32, No. 6, pp. 995–999, June, 1977.     

A thermodynamic method of determining mean temperature of flowing gas

Summary The proposed thermodynamic method of determining the mean-mass temperature of a gas stream in a pipe is simple, fast and reliable. By means of this method, it is possible to determine the temperature of the gas heated up to any temperature. At the same time, since it is possible to determinate accurately the parameters which enter into the theoretical equations, the error in a temperature determination can be quite low.     

Accuracy of determination of the density of a gas by the multibeam-interferometry method

We estimate the accuracy of the determination of the density of a gas in rarefied streams by using the photometric method of multibeam interferometry. We give the numerical values of the relative error in the measurements for various experimental conditions.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 32, No. 1, pp. 50–52, January, 1977.     

Heat and mass transfer at a vitroplastic surface in a high-temperature air stream

Analyzed are the basic laws which govern the decomposition of vitrographitic materials and the effect of superficial carbon burnout on the wear characteristics of such materials.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 24, No. 3, pp. 407–413, March, 1973.     

Experimental investigation of the rate of phase and chemical transformations in a high-velocity high-temperature stream

A procedure for the experimental-theoretical investigation of the evaporation and combustion of a liquid injected into a supersonic high-temperature stream is proposed.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol.21, No. 5, pp. 821–828, November, 1971.     

A computational and experimental method for estimating degradation of mechanical characteristics of steels under the conditions of high-temperature pyrolysis

The possibility of using computational and experimental methods of strain and fracture mechanics for describing degradation of mechanical properties of steels under conditions of pyrolysis is demonstrated. Experimental and theoretical temperature dependences of the ultimate strength of 10Kh23N18 steel which are characterized by a high degree of correlation are obtained. It is revealed that it is necessary to use correlation coefficients in the equations for calculating the ultimate strength depending on the service time to increase the accuracy of forecasting variations in the mechanical characteristics of steel under operating conditions.     

Experimental determination of the conditions for the granulation (breakdown) of aluminum oxide drops in a high-temperature gas flow

The results of a determination of the critical Weber number for drops of aluminum oxide moving in a flow of combustion products are presented. It is shown that the values of W_* lie in the range 17–22.Translated from Inzhenerno-Fizcheskii Zhurnal, Vol. 26, No. 5, pp. 897–900, May, 1974. Original article submitted May 11, 1973.