Begell House
International Journal of Fluid Mechanics Research
International Journal of Fluid Mechanics Research
1064-2277
26
3
1999
Life of Scientific Activity(On the 100th Anniversary of the Birth of Georgiy Yevstafyevich Pavlenko, Member of the Ukrainian Academy of Sciences)
N. V.
Saltanov
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
P. G.
Avramenko
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
V. G.
Belinskiy
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
N. V.
Shaybo
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
265-272
Safe and Economical Modes of Sailing in Shallow Waterways
This article is a survey of major investigations concerned with the motion of ships in shallow water performed in our Institute over a period of more that four decades.
P. G.
Avramenko
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
N. V.
Shaybo
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
L. I.
Yankovskiy
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
G. P.
Sokolovskiy
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
273-289
An Experimental Study of the Motion of Hydrofoils Near Flat and Undulated Surfaces
Experimental results on the hydrodynamic performance of a hydrofoil moving above a flat and an undulated surface are presented. The hydrodynamic parameters for foils that are rectangular in the plane, have different aspect ratios and move at different angles of attack at different distances from a flat surface and from a surface consisting of sinusoidal waves of different length and height are determined. The Strouhal number dependence of the foil's lift coefficient in moving above an undulated surface is determined. It is shown that the lift of the foil is additionally increased by the surface undulations.
P. I.
Zinchuk
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
V. G.
Belinskiy
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
290-304
Certain Current Trends and Approaches to Resolving Scientific and Engineering Problems Encountered in Designing Surface Effect Craft
The efficiency of surface-effect craft and their place among other means of transportation are examined. The principal problems encountered in designing these machines (improving the aerodynamics, safety (stability) of motion, the problem of starting) and also various aspects of mathematical simulation of hydrofoils near a surface are analyzed. Possible approaches to solving the principal problems in designing new-generation surface-effect craft are discussed.
N. V.
Saltanov
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
V. I.
Korolev
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
A. G.
Kostin
Fluid Mechanics Institute, Ukrainian Academy of Sciences, Kiev, Ukraine
305-328
Numerical Simulation of Sloshing of a Liquid in a Moving Closed Rectangular Container
The problem of sloshing of a liquid, partially filling a covered moving rectangular container, which arises in dynamics of tankers is, investigated. A set of equations allowing numerical analysis of the dynamics of the fluid in the two-dimensional case at arbitrary translational and angular motions of the container is derived by applying the variational method to a model of an ideal, homogeneous, incompressible fluid. Numerical results on determining the frequencies of free sloshing of the liquid upon steep deviations of the ship from the horizontal, when the cavity can no longer by regarded as cylindrical are presented.
G. F.
Zolotenko
Institute of Mathematics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
I. A.
Lukovsky
National Academy of Sciences of Ukraine, Institute of Mathematics, Tereschenkivska 3, 01601 Kiev, Ukraine
329-347
Concerning the Goodness of Fit of Mathematical Models of the Dynamics of a Ship in Waves
The question of goodness of fit of mathematical models of the dynamics of ships in waves is analyzed. Various approaches to the definition of the restoring moment, physical features of list and capsizing, specifics of computational technology and interpretation of results are discussed. Examples of numerical and experimental assessments of the parameters under study are given.
Yu. I.
Nechayev
St. Peterburg Marine Engineering Institute, Russia
348-356
A New Integro-Differential Equation of a Lifting Surface
A new singular integro-differential equation of a slender rectangular lifting surface in the distribution space is obtained, investigated and one of its exact solutions is found.
A. N.
Panchenkov
Volgo-Vyatsk Branch of the Russian Engineering Academy, Nizhniy Novgorod, Russia
M. N.
Borisyuk
National Institute of Agriculture, Kiev, Ukraine
357-364
Experimental Studies of High-Speed Cavitated Flows
Some experimental results on high-speed motion of models in water are presented. An empirical formula for calculating the shape of axisymmetric supercavities is derived. Qualitative features of supercavities at velocities commensurable with the speed of sound in water are described. A new method of controlling the parameters of supercavities by controlling the resistance of the cavitation generator is implemented experimentally.
Yu. N.
Savchenko
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
Yu. D.
Vlasenko
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
V. N.
Semenenko
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine
365-374
Dynamics of Interaction between Stormy Seas and a Ship with Allowance for Nonlinearities?
Approximate methods of calculation of the hydrodynamics of wind-generated sea waves and of the reaction of a ship's hull to wave action in stormy seas with allowance for nonlinear and unsteady effects in the impinging waves, wave-impact loading and the ship's oscillations are analyzed. The approximation is based on the assumption of group structure of the principal energy-conveying component of wave motion in the sea, employing asymptotic methods for solving boundary-value problems of wave dynamics and numerical methods for calculating the reaction of the ship to the action of wave packets. Certain numerical results on nonlinear pitching and heaving, wave loads and wave-induced oscillations of ships with allowance for nonlinear effects are also presented.
N. A.
Serdyuchenko
Ukrainian State Marine Engineering Institute, Nikolayev, Ukraine
375-400
Force-Couple Induced Motion of a Floating Contour
A two-dimensional nonlinear, unsteady hydrodynamic problem of force-couple induced motion of a contour is analyzed. The motion of the liquid is investigated in terms of Lagrange variables. The solution for the initial period of motion is sought in the form of time series. The search for coefficients of the series describing the motion of the liquid and the hydrofoil yields respectively boundary-value problems and sets of linear equations. The initial location of the axis of rotation and the induced moment of inertia of the liquid are determined for the particular case of a circular cylinder.
V. G.
Sizov
State Marine Academy, Odessa, Ukraine
401-414
Hydrodynamics of Three-Dimensional Bodies in Oblique Flow
A method for determining the hydrodynamics of three-dimensional bodies in oblique flow with angle of attack varying along the body is analyzed within the framework of the ideal-fluid theory. The method, based on utilizing current advances in wing theory, and also numerical methods of fluid mechanics and mathematics, is implemented in the form of computational algorithms and computer programs, makes it possible to calculate, in addition to integral hydrodynamic parameters, also the positioning and damping hydrodynamic forces distributed over the surface of the body.
N. B.
Slizhevskiy
Ukrainian State Marine Technological Institute, Nikolayev, Ukraine
V. F.
Timoshenko
Ukrainian State Marine Technological Institute, Nikolayev, Ukraine
415-424