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Information × Registration Number 0206U000141, 0102U000076 , R & D reports Title Investigations of control methods for the wall and jet supercavitation flows popup.stage_title Head Savchenko Yurij Mykolayovych, Registration Date 13-01-2006 Organization Institute of Hydromechanics, National Academy of Sciences of Ukraine popup.description2 Results of experimental investigations with the purpose to clear the question of expediency of adding polymers and tamols to diminish the gas leakage from the cavity. Compressibility and capillarity of the real liquid are taking into account. Peculiarities of the plane supersonic cavitation flows are analyzed. Prospects of pressure drag diminishing with the use of long supercavities on the surface of an endless cylinder and finite body are considered. With the use of computer simulation, non-steady processes in the ventilated supercavity control by regulation of the air blowing rate are investigated. The reasons of the hydrodynamic characteristics discontinuity of the supercavitating controls are established. The calculation code is developed. Theoretical investigations of the wall flows in the boundary layer and a physical model of the cavity separation on the smooth surface are presented, taking into account the non-uniform vorticity of the real flows. The results of cavity shape calculations are presented. The influence of the minimum pressure at the hydrofoil leading edge on the cavitation flow characteristics is investigated. Experimental and theoretical investigations of free boundary flows above the easily penetrable roughness are carried out. Theoretical investigations of a head flow in the channels with the different easily penetrable roughness are done.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close