Back

DYNAMICS OF RAREFIED GASESDYNAMICS OF RAREFIED GASES

About Institute
Departments and Laboratories
Applications
Journals

Search:

Usage:
"AND""OR"


Non-equilibrium processes in rarefied gases and continuous flows with great parametrical gradients are tradi-
tionally studied at the Institute. The following transfer problems are being solved there: in gas mixtures with inner freedom degrees, for expansion into a vacuum, for interaction of high-speed flows with surfaces, for radiation, beam, and discharge effect on flows and surfaces, and for phase transformations in flows and on surfaces. The main application for these results is in spacecraft technics and vacuum technologies.
    The unique experimental base (including some vacuum installations with a volume of up to 140 m3 and dynamic vacuum of up to 10-6 mm Hg) is the starting point for fundamental research on the dynamics of rarefied gases. These vacuum installations are equipped with electron-beam, laser, molecular-laser, spectroscopic, and mass-spectrometrical measurement devices. Theoretical investigations include analytical approaches and numerical calculations based on the complete set of Navier-Stokes equations, methods of molecular dynamics and direct statistic modeling.
    The most important achievements of the Institute are connected with the study of processes occurring during the expansion of supersonic free jets. They deal with the following: the jets' structure, interaction of high-energy electrons with atoms, molecules, and clusters (small particles of a new phase), non-equilibrium processes during expansion (oscillating, rotational, and progressive relaxations), experimental determination of constants for relaxation processes, generation and properties of clusters, induction processes in clusters, and their interaction with a surface.
    Together with conventional investigations, applications of the developed methods are expanded into adjacent fields. Among these studies are the following:

  • evolution of high-temperature torches generated by a powerful laser impulse on various materials;
  • formation and properties of nanometer-scale objects;
  • plasma-chemical processes;
  • condensation and evaporation processes on a surface;
  • flows in minimal turbulent scales.

Razdel-8-1_Small.jpg (15783 bytes)

Razdel-8-2_Small.jpg (15679 bytes)

VIKING - the large-scaled
vacuum gasodynamic installation
with cryogenic pumping.

Razdel-8-3_Small.jpg (11873 bytes)

Razdel-8-4_Small.jpg (3082 bytes)

Razdel-8-5_Small.jpg (12983 bytes)

The flow structure behind the four-nozzle arrangement of a spacecraft.

Flow visualization behind a supersonic ring nozzle with the help of an electron beam.

The experimental scheme of the molecular beam generator.

Булгакова Н.М., Плотников М.Ю., Ребров А.К.
Моделирование стационарнарного расширения газа с поверхности сферы в вакуум // Изв. РАН, МЖГ, 1997, № 6, С. 152-158.

Belikov A.E., Kuznetsov O.V., Sharafut-dinov R.G.
The rate of collisional quenching of N20=(B), O2+(b), O+(3d), O(3p), Ar(4p'), Ar+(4p, 4p') at the temperature < 200 K // J. Chem. Phys., 1995, vol. 102, p. 2792-2801.

Bochkarev A.A., Pukhovoy M.V.
Condensation of zink and butanol vapors on a cryogenic surface // Vacuum, vol. 48, no. 6, p. 579-584.

Bulgakov A.V., Predtechensky M.R., Mayorov A.P.
Transport of neutral atoms, monoxides and clusters in the lume produced by laser ablation // Appl. Surf. Sci., 1996, vol. 96, P. 1159-1163.

Chekmarev S.F.
Effect of condensation heat on the condensation coefficient // AIChE J., 1996, vol. 42, no. 9, p. 2467-2475.

Kuznetsov L.I., Parfenov M.V., Voronel E.S., Yarygin V.N.
Electron-beam X-ray diagnostics of impulse free jets // Proc. 19th Int. Symp. RGD, England, Oxford, 1995, vol. 2, p. 1481-1487.

Novopashin S.A., Perepelkin A.L.
Turbulence in rarefied gas // Proc. of 17th Int. Symp. on RGD, Weinheim, New-York, Basel, Cambridge. 1991, p. 191-197.

Vostrikov A.A
et. al. Ionization of water clusters by collision with surface // Z. Phys.D. 1997. V.40.P.542-545.

   
 

Up

   

© 2003 Institute of Thermophysics Sibirian Branch of Russian Academy of Sciences