Accession Number : AD0708434

Title :   HYDROELASTIC ANALYSIS OF A CIRCULAR CYLINDER/LIFT ON BODIES OF REVOLUTION.

Descriptive Note : Final rept.,

Corporate Author : NORTH AMERICAN ROCKWELL CORP DOWNEY CALIF SPACE DIV

Personal Author(s) : McLaughlin,Howard D. ; Ujihara,Ben H.

Report Date : DEC 1969

Pagination or Media Count : 419

Abstract : Potential theory is applied to numerical solution of non-steady, separated flows about cylindrical bodies. The particular configurations studied are (1) an elastically supported circular cylinder in uniform onset flow and (2) a growing elliptical cylinder representing, in the cross flow plane, a slender body at angle of attack. Solution of non-steady, separated flows by potential theory is made possible by a generalization of the Kutta-Joukowski Condition to govern the rate of vorticity transport from the attached boundary layer into the near wake. This vorticity is represented by incremental, discrete particle vortices. Both theory and numerical results are presented. For the elastically supported circular cylinder, the natural frequency is taken to be the Strouhal frequency. Instantaneous pressure distributions, and force time histories are shown. For slender bodies at angle of attack, lift distributions, force and moment coefficients are presented for a body of revolution with length-diameter ratios of 10 at various angles of attack. Detailed separated flow stream lines are also shown. (Author)

Descriptors :   (*CYLINDRICAL BODIES, HYDRODYNAMICS), (*FLOW SEPARATION, CYLINDRICAL BODIES), NUMERICAL ANALYSIS, POTENTIAL THEORY, ANGLE OF ATTACK, SLENDER BODIES, VORTICES, LIFT

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE