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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.2019030506
pages 319-328

DISPERSED PHASE VELOCITY IN A HIGH-TEMPERATURE GAS FLOW

Dmitry V. Nesterovich
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of the Republic of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus
Oleg G. Penyazkov
Laboratory of Physical-Chemical Hydrodynamics, Department of Physics and Chemistry of Nonequilibrium Media A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus
Yu. A. Stankevich
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of the Republic of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus
M. S. Tretyak
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of the Republic of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus
Vladimir V. Chuprasov
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of the Republic of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus
Ilya N. Shatan
A.V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Brovka Str., Minsk, 220072, Republic of Belarus

RESUMO

At the present stage of space research, one of the most important tasks is the experimental study of heat-shielding materials of a descent spacecraft in conditions of strong dustiness of the atmosphere. To study the physicochemical processes occurring on the surface of a heat-shielding material, when modeling the entry of a spacecraft into the planet's atmosphere, it is necessary to create hypersonic high-enthalpy heterogeneous flows with constant monitoring of gas-dynamic parameters. The aim of this work was to obtain the maximum possible velocity of the heterogeneous phase at the Luch-22 setup, which is based on the electric-arc gas heater of a linear scheme with magnetogas-dynamic stabilization of the jet. A numerical simulation was carried out to determine the output nozzle geometry and the position for injection the dispersed phase into the main flow. As a dispersed phase, SiO2 particles with a determining diameter of 14.2 μm were used. A high-speed CCD camera with image intensifier with flash synchronization of a two-pulse Nd:YAG laser with Q-switching was used to record the velocity of particles in the plasma torch stream. Experimental results showed that with the selected geometry of the nozzle block and the position of the injection channel of particles, the velocity of the dispersed phase in the flow reaches 2200-2300 m/s. It is shown that when designing a nozzle unit, it is necessary to take into account the size and material of the particles of the dispersed phase.

Referências

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