Two tubes in tandem and normal to flow were studied on the basis of the unsteady-flow theory. Motion-dependent fluid forces were measured in a water channel, and the pitch-to-diameter ratio was 1.35. From the measured fluid forces, fluid damping and stiffness were calculated as a function of reduced flow velocity and several Reynolds numbers. Once the fluid-damping and fluid-stiffness coefficients are known, coupled vibration and stability of the two tubes in cross-flow can be predicted.
Issue Section:
Research Papers
Topics:
Cross-flow,
Stability,
Vibration,
Fluids,
Damping,
Flow (Dynamics),
Stiffness,
Reynolds number,
Unsteady flow,
Water
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