Nonsteady flow of dissociating nitrogen tetroxide in a steam-generating channel

A one-dimensional conjugate model is proposed for the nonsteady flow of chemically reacting nitrogen tetroxide in a steam-generating channel and the boundaries of hydrodynamic stability are investigated.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 33, No. 6, pp. 993–1000, December, 1977.     

Heat and mass transfer during the laminar flow of dissociating N2O4 gas in a triangular bundle of cylinders

The problem of heat and mass transfer during the laminar flow of a dissociating gas in a triangular bundle of rods is analyzed. The solution is obtained by numerical means.     

Generalized solutions of nonsteady heat and mass transfer

We have solved a system of differential equations for the simultaneous transport of moisture and heat in the case of a plate, a cylinder, and a sphere, with boundary conditions of the first, second, and third kinds. We also consider the interrelated transfer of heat and moisture during the period of the declining drying rate.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol.16, No.2, pp.299–307, February, 1969.     

Coupled heat transfer in nonsteady flow about a rod bundle

The finite elements method and finite differences method are used together to study a nonsteady three-dimensional coupled problem of convective heat transfer during longitudinal flow about a bundle of heat-emitting rods.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 55, No. 1, pp. 135–139, July, 1988.     

Heat exchange during the movement of a vapor-liquid stream of dissociating nitrogen tetroxide

The results of studies of heat exchange during the flow of a vapor-liquid stream of a dissociating N₂O₄, system in vertical pipes are analyzed and functions are given for calculating the heat-exchange intensity under different flow conditions.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 29, No. 2, pp. 251–260, August, 1975.     

Conjugate problem of steady heat exchange in the laminar flow of an incompressible fluid in a flat channel

The conjugate problem of convective heat exchange in a flat channel is solved by the combined application of the integral Laplace transformation and the Bubnov-Galerkin method.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 30, No. 3, pp. 512–518, March, 1976.     

Computation of nonstationary heat exchange with laminar fluid flow in pipes of annular cross-section

An analytic computation method is presented for the temperature field of a viscous incompressible fluid in the case of laminar flow in a ring-like cylindrical channel of arbitrary profile.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 20, No. 6, pp. 1003–1007, June,1971.     

Determination of the characteristics of nonsteady heat exchange in one disperse reactive system

The laws of nonsteady heat exchange in a disperse reactive system are investigated within the framework of a new model of heat exchange in a disperse medium not using the concept of a coefficient of heat exchange.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 35, No. 6, pp. 1019–1026, December, 1978.     

Calculating radiant heat exchange between a fluidized bed and a surface

Radiant heat transfer in a nonisothermal fluidized bed is calculated.     

Calculating convective heat exchange in a hypersonic viscous shock layer

The streamlining of bodies with catalytic surfaces is investigated within the framework of a model of a hypersonic three-dimensional viscous shock layer.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 56, No. 2, pp. 298–301, February, 1989.     

Flow in a laminar boundary layer under intensive injection and radiant heat exchange

An asymptotic solution has been obtained for the system of boundary layer equations with intense injection of a foreign absorbing substance for optically thick and thin boundary layers taking account of the influence of a magnetic field. Analytical formulas are presented which permit computation of the temperature, concentration, and heat flux profiles.     

Structural analysis of the conjugate problem of nonsteady heat exchange at the stagnation point of a stream

The problem of nonsteady heat exchange at the stagnation point of a stream is discussed. Its solution, obtained in Laplace transforms, is represented in the form of a schematic diagram establishing the connection between the observed quantities.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 37, No. 4, pp. 730–738, October, 1979.     

Electrical simulation of boundary conditions in nonsteady problems op heat and mass transfer

A method of modeling heat- and mass-transfer problems with boundary conditions of the second and third kinds is described. Simplified model circuits are presented.     

Solution of the differential equations of heat and mass transfer for laminar flow of a binary gas mixture over a flat plate

An attempt is made to elucidate the increased mass transfer resulting from flow pulsations on the basis of a solution of the differential equations of heat and mass transfer.     

Influence of developing flow on the heat transfer in laminar oscillating pipe flow

A theoretical analysis was performed to evaluate the influence of developing flow on the heat transfer associated with laminar oscillating pipe flow. Simplified analytical approaches are briefly discussed before an investigation based on the numerical solution of the conservation equations for mass, momentum and energy is presented, assuming constant wall temperature and an incompressible viscous fluid. Focusing on operating conditions as found in heat exchangers of regenerative thermal machines, like Stirling engines or Vuilleumier heat pumps, numerous calculations of the flow field and the heat transfer have been executed covering wide ranges of the characteristic dimensionless groups. The results are presented in tems of correlations of the mean Nusselt number averaged on the pipe length and a distribution function describing the local heat transfer. Furthermore, it is shown that the derived correlations are also applicable to compressible fluid flow, provided that the relative pressure amplitude is within the limits typical of regenerative thermal machines.     

Heat exchange and hydraulic resistance during laminar condensation of nitrogen tetroxlde in a vertical pipe

A method of calculating the heat exchange and hydraulic resistance during film condensation in a vertical pipe is discussed. The results of the calculation are compared with experimental data on the condensation of nitrogen tetroxide and water.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 34, NO. 5, pp. 799–806; May, 1978.     

Modeling the heat and mass exchange process in the systems of porous cooling with gas flow pulsations

The interaction of heat shielding material with a high-temperature pulsating gas flow is considered. The possibility of heat and mass transfer process control in porous cooling systems is studied.     

Friction and heat exchange in flow over a permeable surface

The extremal character of the dependence of friction on suction velocity on a permeable surface immersed in an incompressible liquid flow is established. The suction value corresponding to maximum friction and the limiting heat exchange intensity are calculated.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 54, No. 5, pp. 714–718, May, 1988.