Nonlinear fluid-structure interaction of a restrained slender body of revolution at high angles of attack

The flow around an inclined tangent ogive-cylindrical body of a finite length, placed in a wind tunnel and allowed to yaw in the x-y plane, is studied computationally. The flow is three-dimensional, compressible and laminar with Reynolds number of 30,000 based on the body diameter and a Mach number of 0.2. The study covers the range of angles of attack from 0 degrees to 60 degrees, both for fixed and yaw-restrained configurations where solutions are determined after removal of initial disturbances. The restrained-yaw configuration portrays a distinct bifurcation pattern that includes coexisting periodic limit-cycle oscillations and nonstationary solutions for moderate and large angles of attack respectively.