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Thermophysics and Aeromechanics

2006 year, number 4

Founder of modern cosmonautics (to the 100th anniversary of S.P. Korolev)

A.I. Maksimov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 467-488

Abstract >>
The basic milestones of the life journey of S.P. Korolev (12.01.1907- 14.01.1966), the Designer General of rocket and space systems, are presented. Information on various missiles of the first generation R-1,
R-2, R-5, R-7, and R-9, launch vehicles Sputnik, Luna, Molniya, Vostok, Soyuz, and N-1, and also spacecraft designed for various purposes, which were developed under Korolev

Characteristics of a hyperboloid-flare configuration at high Reynolds numbers

V.I. Zvegintsev1, A.M. Kharitonov1, V.F. Chirkashenko1, S.V. Chibisov1, D. Fletcher2, and S. Paris2
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Von Karman Institute for Fluid Dynamics, Belgium
Pages: 489-497

Abstract >>
Results on a hyperboloid-flare model tested in a new hypersonic wind tunnel with adiabatic compression AT-303 based at ITAM SB RAS at

Direct measurements of the drag of a body of revolution in an incompressible flow under the action of eddy breakup devices

V.I. Kornilov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 499-506

Abstract >>
The drag of an axisymmetric body of revolution in a nominally gradientless incompressible flow under the action of eddy breakup devices (EBU) is studied experimentally. It is demonstrated that the use of EBUs in the boundary layer may reduce the net drag of the body of revolution approximately by 1.75 %, as compared with the corresponding value for the original configuration. An increase in the chord length of single-element devices and the height of their location in the boundary layer is found to gradually reduce the EBU effectiveness and, hence, to increase the net drag, as compared with the original configuration.

Experimental and theoretical investigation of boundary layer perturbations on a low-aspect-ratio wing

V.V. Kozlov1, I.D. Zverkov1, B.Yu. Zanin1, A.V. Dovgal1, V.Ya. Rudyak 2,3, E.G. Bord2, and D.F. Kranchev2,3
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
The Novosibirsk State University of Architecture and Civil Engineering, Novosibirsk, Russia
Novosibirsk State Technical University, Novosibirsk, Russia
Pages: 507-514

Abstract >>
Laminar-turbulent transition in a boundary layer of low-aspect-ratio wing was investigated. Experiments clarifying the flow structure, its mean and oscillatory characteristics were carried out accompanied by linear stability analysis of the wind tunnel data on the laminar flow velocity profiles. Theoretical results obtained in a parallel flow approximation are in a good agreement with the experimental data on disturbances evolution at the initial stage of transition to turbulence.

Investigation of velocity field of gas flow moving behind a piston in rectangular branch pipe

O.G. Kudelin
Novosibirsk State Academy of Water Transport, Novosibirsk, Russia
Pages: 515-521

Abstract >>
The two-dimensional boundary-value problem of the unsteady flow of an incompressible viscous gas moving behind the piston in a

Direct simulation Monte Carlo of pulsed laser ablation of metals with clusterization processes in vapor

N.Yu. Bykov and G.A. Lukyanov
St. Petersburg State Polytechnic University, St. Petersburg, Russia
Pages: 523-535

Abstract >>
A mathematical model is proposed to describe laser ablation of metals in vacuum under the action of nanosecond laser pulses of moderate intensity taking into account the processes of cluster formation and decay in the vapor cloud. To describe the laser radiation absorption and metal heating, the thermal model based on the unsteady one-dimensional heat equation with a volume heat source is used, and the method of statistical modelling is employed for modelling vapor expansion and the processes of cluster formation. The efficiency of the proposed complex model is considered by the example of pulsed laser ablation of a niobium target.

Effect of temperature of supersonic heterogeneous flow on the erosion-spraying transition

T.V. Ershova2, V.F. Kosarev1, and D.S. Mikhatulin2
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Institute of High Temperatures RAS, Moscow, Russia
Pages: 537-547

Abstract >>
This publication is a continuation of works devoted to problems that arise in heterogeneous technologies. The matter of parameters that define the transition from surface erosion to particle spraying onto the surface is addressed. In particular, we experimentally examine the influence of temperature of the supersonic heterogeneous flow (carrier-gas temperature and particle temperature) interacting with the streamlined obstacle on the occurrence probability of either surface damage or particle spraying.

Experimental investigation of local heat transfer in the packing with triangular channels

B.V. Perepelitsa
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Pages: 549-555

Abstract >>
Results of experimental studies on temperature distribution over the surface of a complex-shape heat exchanger like

Heat transfer in tubes with periodic draft under supercritical conditions

R.F. Kelbaliev and T.F. Dzhabrailov
Azerbaijan State Oil Academy, Baku, Azerbaijan
Pages: 557-563

Abstract >>
The temperature mode of a wall was studied experimentally for sub- and supercritical pressures of water in tubes with turbulence stimulators; these data were compared with similar results obtained for a smooth tube. An increase in heat transfer inside a turbulizing tube was revealed for a single- and two-phase water flows. Correlation dependencies for determination of heat transfer coefficient in a single-phase flow inside a tube with turbulence stimulators were obtained.

Modelling of thermogravitation convection in closed volume with local sources of heat release

G.V. Kuznetsov1 and M.A. Sheremet2
1Tomsk Polytechnic University, Tomsk, Russia
Tomsk State University, Tomsk, Russia
Pages: 565-574

Abstract >>
A mathematical model is presented for unsteady conjugate convective-conductive heat transfer in a closed volume with local sources of heat release under the conditions of a convective-radiation heat exchange on one of external faces of the solution region. The thermogravitation convection regime was analysed for moderate Grashof numbers. The typical temperature and velocity fields were obtained, and the fields of desired quantities were compared for the planar and three-dimensional models in one of the typical sections of the solution region.

Experimental study of the density of aqueous solutions of lithium bromide at temperature of up to 250

R.A. Khairulin, V.A. Gruzdev, S.V. Stankus, and O.I. Verba
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Pages: 575-583

Abstract >>
The density of aqueous solutions of lithium bromide was studied by the monochromatic gamma-ray attenuation method at the saturation line from the liquidus temperature of up to 250 

Thermal conductivity of aqueous solutions of salts for high parameters of state

U.B. Magomedov and A.B. Alkhasov
Institute of Geothermal Problems, Dagestan Scientific Center RAS, Makhachkala, Russia
Pages: 585-590

Abstract >>
New generalized formulas for calculation of thermal conductivity of aqueous solutions of binary and multicomponent inorganic substances under high values of state parameters were derived. New values of thermal conductivity were calculated for aqueous solutions of salts within the ranges of temperatures of 293- 473 K, concentrations of 0- 25 mass % and pressures

Experimental study of boiling-up kinetics and superheat limit for n-hexane on solid powder-like structures

A.L. Gurashkin, S.A. Perminov, and G.V. Ermakov
Institute of Thermophysics UB RAS, Ekaterinburg, Russia
Pages: 591-599

Abstract >>
The experimental setup is described and results are presented for measuring average boiling-up lag time for superheated n-hexane mixed with solid structures (activated coal, cellulose, silica gel) as function of temperature under atmospheric pressure. The

Numerical computation of electric arc with annular attachment on the cathode butt end

A. Zh. Zhainakov, R.M. Urusov, and T.E. Urusova
Institute of Physics, National Academy of Sciences, Bishkek, Kyrgyz Republic
Pages: 601-607

Abstract >>
The results of computing a stationary arc with annular attachment on the butt end of a solid cylindrical cathode are presented. The influence of the discharge external parameters on the characteristics of arc plasma and the anode thermal state are considered.

Plasma-thermal decomposition of molybdenite. Equipment and experiment

А.N. Timoshevsky†, V.А. Yemel’kin, B.А. Pozdnyakov, And I.М. Zasypkin
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 609-614

Abstract >>
The possibility of effective application of a plasma technology to decompose the molybdenum sulphate concentrate, molybdenite, is under consideration. First, the model system MoS2- N2 and then the real concentrate underwent the thermodynamic analysis. It has been shown that in the case of the real system which contains quite a few carbon (~26 %), initial feedstock decomposes through a stage of refractory molybdenum carbide

Peculiarities of the ignition of propane-air premixed flows by CO2 laser radiation

S.S. Vorontsov, V.N. Zudov, P.K. Tretyakov, and A.V. Tupikin
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 615-621

Abstract >>
Results of an experimental study of the ignition dynamics of propane-air premixed flows under pulsed-periodic laser irradiation are reported. Ignition of homogeneous flows emanating into free atmosphere is considered. A comparative analysis of experimental and predicted delay times for the ignition for a medium at rest is given.