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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN 印刷: 1940-2503
ISSN オンライン: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2011001643
pages 289-299

NUMERICAL INVESTIGATION OF A DYNAMICS AND OPTICS OF THE MULTIPHASE FLOWPAST A SPHERE

Alexey Borisovich Miller
Central Aerohydrodynamic Institute, Zhukovsky, Moscow region, Russia, 140180
Galina Vasilievna Molleson
Central Aerohydrodynamic Institute, Zhukovsky, Moscow region, Russia, 140180
Al'bert Leonidovich Stasenko
Central Aerohydrodynamic Institute, Zhukovsky, Moscow region, Russia, 140180
Eduard Borisovich Vasilevskii
Central Aerohydrodynamic Institute, Zhukovsky Moscow region, Russia

要約

There are many problems arising in the interaction of a high-speed dusty flow with a blunted body that are essential for many areas of human applications (entering into dusted planet atmospheres, the technology of thin covering with intrusion of particulates, etc.). In laboratory investigations of these processes (for example, in the evaluation of particle spatial distributions near body surfaces), optical methods are being used, and the sounding radiation scattered by the particulate multitudes have been measured (see, for example, the 2004 study done by Vasilevskii and co-workers, entitled “Diagnostics of supersonic dusted flow near a blunt body”). The physic-mathematical model of spatial distribution of the gas-particle flow parameters in a compressed layer near a sphere, and the results of the numerical investigation done by Vasilevskii and co-workers are presented as the input data “typical” for an experiment in a supersonic wind tunnel. The non-equilibrium dynamics and thermo-dynamics of the phases are taken into shock, as well as a reverse influence of the mono-disperse phase upon the carrying gas. The gas is described in the framework of a Eulerian model combined with the Mendeleev-Clypeiron equation of state. The influence of the relative particle mass rates and their radii upon two-phase flow is numerically investigated. The role of the radiation scattered by the surface of a flown-around body, illuminated with the monochromatic sounding laser “sheet,” upon the total optical signal (registered to measure the micro-particulate local concentration in the compressed layer), is studied. The radiation scattered by the sphere surface coincides qualitatively with the experimental observations. This comparison shows the necessity to take into consideration the radiation scattered by the sphere surface itself.


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