A numerical study of the fluid–structure interaction of an inclined tangent ogive-cylinder rigid body, mounted on torsion springs that can rotate in the pitching, yawing, and rolling directions, is conducted. The body is subjected to three-dimensional compressible laminar flow at a Reynolds number of 30,000 and a Mach number of 0.2. A second-order implicit finite difference scheme is employed for the flow equations, adapted to a curvilinear coordinate system, whereas the coupled structural equations, written using an Euler angle notation, are solved by a fourth-order Runge–Kutta method. A detailed investigation of two angles of attack, α = 40 deg and α = 55 deg , is described. For a fixed body at α = 40 deg , the yaw moment changed smoothly with the location of the circumferential disturbance, whereas at α = 55 deg the yaw moment was characterized by an almost square-wave variation behavior with bifurcation points at disturbance circumferential roll angles Φ 90 deg , Φ 140 deg , and Φ 180 deg . For an elastically mounted body, the response at α = 40 deg for all disturbance locations resulted in large-amplitude periodic yawing and pitching moments. The response at α = 55 deg resulted in large-amplitude moments, which occurred only for disturbance locations that coincided with the bifurcation points of the fixed body. The response at the bifurcation points was found to be quasi-periodic for Φ 90 deg , periodic for Φ 140 deg , and nonstationary for Φ 180 deg .


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    Title :

    Fluid–Structure Interaction of an Elastically Mounted Slender Body at High Incidence


    Contributors:

    Published in:

    AIAA Journal ; 53 , 5 ; 1309-1318


    Publication date :

    2015-05-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English