Turbulent flow in a cylindrical channel

The distribution function for turbulent frictional stress is proposed for flow in a cylindrical channel. Formulas are obtained for the calculation of the velocity distribution according to the well-known law of hydraulic drag of the channel.     

Turbulent flow of a fibrous suspension in a pipe

The Henky-Ilyushin equations are used to describe the steady turbulent flow of an incompressible viscoplastic fluid in a pipe. A fibrous suspension is examined as the fluid.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 58, No. 2, pp. 223–229, February, 1990.     

Heat transfer of a swirled flow of gas suspension in a short channel

On the basis of generalized experimental data obtained by the method of local modeling, the article suggests a method of calculating the heat transfer of a swirled flow of gas suspension in a short channel.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 43, No. 3, pp. 365–370, September, 1982.     

Turbulent flow in a cylindrical circular-recess channel

Modeling of a turbulent flow in a cylindrical solid propellant charge channel having a circular recess (compensator) has been performed. Different variants of the compensator position and connection to the channel are discussed. The influence of the geometric and consumption factors on the formation of distributions of the gas-dynamic parameters and characteristics of turbulence in the working region has been investigated. __________ Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 6, pp. 116–121, November–December, 2007.     

Convective heat exchange in turbulent flow of a gas suspension within a cylindrical channel

A convective heat-exchange model is presented for flow of a gaseous suspension in a tube, which considers the increase in heat capacity of the system and the effect of particles on the turbulent structure of the flow. Comparison of calculated results with experiment shows good agreement.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 48, No. 5, pp. 733–737, May, 1985.     

Statistical description of a turbulent gas suspension flow of large particles colliding with channel walls

Based on the particle distribution density function method over space, velocity, and angular rotational velocity, a closed system of equations for the first and second moments of the fluctuations of the characteristics of the particles and boundary conditions representing the process of the loss of momentum and onset of rotation of the particles caused by collisions with walls are found.     

Condensation of a chemically reactive gas on a horizontal tube

A numerical solution is presented for a system of differential equations of heat and mass transfer in a boundary layer in the laminar condensation of a gas on a horizontal tube.Notation g acceleration due to gravity - r external radius of tube - r_k latent heat of condensation - Pr Prandtl number - Sc Schmidt number - T temperature - x distance along circumference - y distance along radius beyond the cylindrical surface - viscosity - density - kinematic viscosity Indices s saturated - liquid-gas interface - h gas - q liquid - wl wall Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 40, No. 5, pp. 793–799, May, 1981.     

Turbulent flow and heat transfer in a rotating slit-shaped channel

A two-parameter turbulence model is used to numerically study flow and heat transfer in a channel rotating about its transverse axis.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 48, No. 5, pp. 720–726, May, 1985.     

Gas velocity profile in the turbulent flow of a gas suspension in a channel of annular cross section

On the basis of concepts concerning two dynamically independently acting zones of a stream in an annular channel and the existence of a universal velocity profile in each zone, the parameters of this profile are calculated for the carrying medium of the gas-suspension stream.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 28, No. 5, pp. 781–187, May, 1975.     

Wall-particle interaction in a vertical gas suspension flow

The results of an experimental investigation of the carrier velocity fields in a vertical gas suspension flow are presented, and the development of the shear stress due to interaction between the particles and the channel walls is analyzed.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 32, No. 5, pp. 860–864, May, 1977.     

Computation of hypersonic flow and radiation of viscous chemically reacting gas in a channel modeling a section of a scramjet

This work is devoted to a consideration of flow and combustion of a hydrogen-air mixture in a channel modeling a section of a supersonic combustion ramjet (scramjet). Fields of concentrations, pressure, and temperature are obtained. Based on them, the thermal radiation of gas within a scramjet combustor is computed. The density of the radiative heat flux to the chamber wall is computed by two methods, i.e., in a P1 approximation of the spherical harmonics method and in an approximation of the plane layer. It has been shown that the radiative heat flux contribute significantly to the total heating of the jet wall.     

Turbulent flow in a rectangular cavity in the wall of a two-dimensional channel

Results are presented of a theoretical and experimental investigation of flow of a turbulent incompressible liquid over a rectangular cavity of relative depth 1–3.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 46, No. 3, pp. 363–371, March, 1984.     

Heat exchange during laminar flow of chemically reactive NO2 gas in a flat tube with boundary conditions of the second kind

The results of a calculation of heat exchange during the laminar flow of a chemically reactive gas in a flat tube are presented.     

Rarefied gas flow through a zigzag channel

A rarefied gas flow through a channel of zigzag shape is calculated over the wide range of the gas rarefaction and for several values of the aspect ratio applying the linearized kinetic equation. In the hydrodynamic flow regime, the kinetic solution is compared with that obtained from the Stokes equation. An approach to calculate a flow rate through a chain composed from an arbitrary number of zigzags is proposed. It was found that in some situations, the flow rate through a zigzag channel is higher than that trough a straight channel of the same length.     

Transonic flow of a viscous gas in a plane-parallel channel

Results are given of a theoretical analysis of an adiabatic gas flow in a plane-parallel channel near the critical point. It is shown that the velocity profile ahead of the critical point must fill out, and that the mean velocity at the critical section exceeds the velocity of sound.     

Nonsteady nonisothermal flow of compressible gas in a channel with track sampling

A method is proposed for forming a linear mathematical model of a pulsating gas flow with entropy waves, in the case of gas sampling distributed along a channel, and the sampling are compared with experimental data.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 54, No. 4, pp. 543–550, April, 1988.     

Turbulent diffusion of passive impurity in gas suspension at large reynolds numbers

Experimental results on the turbulent diffusion of passive impurity in a gas-suspension flow in a vertical cylindrical channel are outlined. On the basis of introducing simple approximations of spectral functions of the velocity pulsations, the influence of the discrete phase on the turbulent diffusion coefficient is estimated.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 59, No. 4, pp. 631–634, October, 1990.     

Entropy losses in the flow of a dust-laden gas suspension in a nozzle

The unidimensional steady-state flow of a gas containing a system of solid particles in a nozzle is considered for the case in which the particles are characterized by a constant velocity lag; expressions are derived for the entropy losses in efficiency due to the friction between the gas and the particles and the irreversibility of interphase heat transfer.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 18, No. 5, pp. 828–831, May, 1970.