## Flow and Force Equations for a Body Revolving in a Fluid

Description: A general method for finding the steady flow velocity relative to a body in plane curvilinear motion, whence the pressure is found by Bernoulli's energy principle is described. Integration of the pressure supplies basic formulas for the zonal forces and moments on the revolving body. The application of the steady flow method for calculating the velocity and pressure at all points of the flow inside and outside an ellipsoid and some of its limiting forms is presented and graphs those quantities for the latter forms. In some useful cases experimental pressures are plotted for comparison with theoretical. The pressure, and thence the zonal force and moment, on hulls in plane curvilinear flight are calculated. General equations for the resultant fluid forces and moments on trisymmetrical bodies moving through a perfect fluid are derived. Formulas for potential coefficients and inertia coefficients for an ellipsoid and its limiting forms are presented. Zahm, A. F. December 1, 1979 UNT Libraries Government Documents Department National Advisory Committee for Aeronautics Collection Technical Report Archive and Image Library Total Uses: 199 Past 30 days: 2 Yesterday: 0
Creator (Author): Creation: December 1, 1979 A general method for finding the steady flow velocity relative to a body in plane curvilinear motion, whence the pressure is found by Bernoulli's energy principle is described. Integration of the pressure supplies basic formulas for the zonal forces and moments on the revolving body. The application of the steady flow method for calculating the velocity and pressure at all points of the flow inside and outside an ellipsoid and some of its limiting forms is presented and graphs those quantities for the latter forms. In some useful cases experimental pressures are plotted for comparison with theoretical. The pressure, and thence the zonal force and moment, on hulls in plane curvilinear flight are calculated. General equations for the resultant fluid forces and moments on trisymmetrical bodies moving through a perfect fluid are derived. Formulas for potential coefficients and inertia coefficients for an ellipsoid and its limiting forms are presented. aerodynamics NASA. Ames Res. Center Classical Aerodyn. Theory; p 197-235 Originator : Naval Ship Research and Development Center NACA Technical Reports UNT Libraries Government Documents Department National Advisory Committee for Aeronautics Collection Technical Report Archive and Image Library LOCAL-CAT-Number: 80N15044 URL: http://hdl.handle.net/2060/19800006785 REP-NO: NACA-TR-323 CASI: 19800006785 ARK: ark:/67531/metadc53409 Report Text Access: Public License: Public Domain Statement: No Copyright, Unclassified, Unlimited, Publicly available