Circulatory Effects Developed during the Motion of Some Objects in the Marine Medium and the Atmosphere

Resumo

The expressions for the hydrodynamic load acting in circulatory flow on a dipole located in a stratified (two-layer) fluid current of finite depth are derived. The wave-making drag and the lift force are investigated as functions of the flow velocity and circulation. It is shown that taking the circulation into account can significantly change the hydrodynamic reaction on the dipole. The effect of sharp (reversible) change in the direction of action of the lift force over a relatively narrow velocity range of flow around the pipeline section modeled by the dipole is revealed. The possibility of manifestation of a similar effect during the motion of self-propelled underwater objects and flying vehicles is discussed.