Accession Number : ADA131917

Title :   Stability of a Pair of Stationary Vortices in the Leeward Side of a Cylinder in a Potential Flowfield.

Descriptive Note : Final technical rept. May-Sep 81,


Personal Author(s) : Singh,Shiva N

PDF Url : ADA131917

Report Date : May 1983

Pagination or Media Count : 24

Abstract : In this report the steady state flow of an incompressible inviscid fluid past a circular cylinder is considered when a pair of asymmetrical stationary vortices are situated in the rear of the cylinder. Complex potential for this flow is obtained with the help of Milne-Thompson's circle theorem. The condition that the vortex centers have zero induced velocity determines the positions of the stationary vortices. This condition is determined for the various combination of the free stream velocity, the radius of the cylinder, and the strengths of the vortices by the secant routine on the computer. Asymmetrical disturbances are introduced and a stability analysis of the system is performed. And finally for the stable systems, the lift force acting on the cylinder is calculated and compared with the experimental results.

Descriptors :   *Steady flow, *Vortices, Stationary, Wake, Potential flow, Cylindrical bodies, Vortex shedding, Incompressible flow, Inviscid flow, Free stream, Velocity, Flow fields, Lift, Theorems, Computerized simulation

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE