An Experimental Determination of Hydrodynamic Masses and Mechanical Impedances
NAVY UNDERWATER SOUND LAB NEW LONDON CT
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The study of the forces acting on a body due to the bodys motion through a fluid is facilitated by the introduction of a hydrodynamic mass, i. e., the mass of fluid that appears to be carried by the body accelerates in the fluid. Hydrodynamic masses have been computed from ideal fluid theory for mathematically easy shapes - spheres, circular discs, etc. There are three methods available for the computation of hydrodynamic mass the impedance approach, the kinetic energy method, and Darwins drift method. Each of these methods is presented in appendixes. Mechanical impedances have been computed for a very limited number of shapes.
- Fluid Mechanics