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This paper demonstrates the influence of geometric parameter variation of a streamlined body on the flow drag performance. A streamlined body with an outline of elliptic forebody and parabolic afterbody is numerically investigated. The effects of geometric parameters including the ratio of maximum section diameter to body length D/L, and the ratio of forebody length to total length LE/L on the flow...
This paper investigates the three dimensional hydrodynamics of a fishlike robot swimming in the straight forward way under self-propulsion. The unsteady flow fields associated with swimming robot is computed by using Navier-Stokes equation. Both the user defined function and dynamic mesh technique are applied to track the robot motion. The results show that the mean magnitudes of net thrust force...
This paper summarizes a shape selection basis for the streamline fishlike body to reduce the flow drag. Friction drag and pressure drag acting on the three proposed streamline body are simulated at high Reynolds number. The effects of shape outline including the inflow section and outflow section are revealed by comparing the boundary layer characteristic. The results show that, the ellipse and parabola...
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