Home – Home – Jornals – Advanced Search

The design of supersonic three-dimensional inlets using the V-shaped body forming a two-dimensional flow including an initial oblique shock wave and a subsequent isentropic compression wave is considered. Such a flow appears attractive for inlets design due to a possibility of obtaining high compression levels of external flow over the inlet ramp with small losses of the total pressure. Numerical computations of the flows around the designed configurations were carried out in design and off-design regimes using Euler code. The flow structure was identified, the aerodynamic characteristics of the inlets were determined. The investigation covers the range of supersonic speeds corresponding to the freestream Mach numbers М_∞ = 1.8−2.5.

In a subsonic wind tunnel, laminar boundary-layer separation at a backward-facing step on a flat plate modulated by stationary flow perturbations was examined. The stationary disturbances were introduced into the flow by controlled roughness elements spaced on the model surface close to the separation line. Through a comparison of obtained data with results gained in previous studies of other periodic roughness systems, some trends in the generation of stationary disturbances subject to transient growth in separation region were revealed.

A numerical analysis of turbulent regimes of the natural convection in a closed rectangular region with heat-conducting walls of finite thickness was carried out in the presence of a locally concentrated heat source under the conditions of the radiative-convective heat exchange with the ambient medium on one of the external boundaries. The mathematical model was constructed on the basis of the Reynolds equations in dimensionless variables stream function − vorticity vector − temperature. Special attention was paid to the investigation of the influence of the Grashof number 10^8<Gr<10^10, of the unsteadiness factor , and the thermal conductivity ratio a2,1=5.7*10^-4, 6.8*10^-5 on both the local and integral characteristics of the problem.

Structure, interdiffusion, and dynamic viscosity of eutectic Sn−Pb melt have been experimentally investigated in a wide temperature range. On the basis of the obtained data on the position and form of the first maximum of the structure factor in the framework of the hard sphere model, values of sphere packing index and sphere diameter have been determined for the melt at 470 and 570 K. Correlations resulting from the model of hard spheres served to calculate coefficients of dynamic viscosity and interdiffusion of liquid alloy. Besides, temperature dependence of dynamic viscosity has been calculated with the use of thermodynamic approximation of Kozlov ⎯ Romanov ⎯ Petrov. Calculated values of the properties have been compared with experimental data.

Results of experimental study for dependency of thermogradient coefficient on moisture in porous material have been presented. These experimental data were used for estimating the effect of hydrothermal conductivity on heat transfer.

The models were developed for thermal conductivity of a binding medium reinforced with tubes and with disperse-hardened hollow inclusions; the models have versions with/without consideration of relaxation times of materials making the phases of composition. For a limiting case, when tubes degenerate into solid fibers, we compared calculated values for efficient thermal conductivity coefficients for the case of single-direction and crisscross reinforced composites with corresponding experimental values. A satisfactory agreement between theory and experiment takes place.

Thermal conductivity of refrigerant 507А in gaseous state has been measured with a stationary method of coaxial cylinders in the temperatures range of 315 - 425 K and pressures 0.105 - 1.855 MPa. Estimated values of temperature, pressure, and thermal conductivity measurement errors are, respectively, ± 0.05 K, ± 3.75 kPa and ± 1.5 − 2.5 %. Approximation dependence for thermal conductivity in the whole studied temperature and pressure range has been obtained. Results have been compared with available literature data.

16 January, 2011  was the 80th anniversary of the Doctor of Technical Sciences, the Honored Worker of Russian Science, winner of the Award of the Council of Ministers of the USSR, Professor Anatoly Mikhailovich Kharitonov.

30 December, 2010  was the 75th anniversary of the Doctor of Technical Sciences, the Honored Worker of Russian Science, winner of the USSR State and of the Award of the Council of Ministers of the USSR, Professor Vladimir Kostantinovich Baev.

This is the review of joint research executed during last 30 years at Korolev Rocket and Space Corporation Energia and Kutateladze Institute of Thermophysics SB RAS on the problem of gas-dynamic and contaminating impact of exhaust plume of orientation thrusters and systems of refueling on spacecraft and space stations.