Abstract
A method is presented for determining the maximum vortex-induced side force and associated yawing moment on slender bodies at high angles of attack in incompressibl e flow at effective crossflow Reynolds numbers from 104 to 108. An analogy with two-dimensional unsteady flow separation on a cylinder normal to the flow is used to bound the maximum steady vortex-induced side force on slender bodies of revolution. It is shown that the maximum vortex-induced side force occurs in the critical effective Reynolds number range when subcritical separation occurs on one side of the body and supercritical separation on the other. Although the method applies only to bodies dominated by a single asymmetric vortex pair, it could be extended to provide a basic building block for bounding the directional stability of long bodies affected by multiple asymmetric vortex pairs.
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