One and two degrees-of-freedom Vortex-Induced Vibration experiments with yawed cylinders

•Vortex-Induced Vibrations with yawed cylinders with one and two degrees-of-freedom.•Oscillation amplitudes and frequencies.•Force coefficients and phase shift between force and displacement.•Differences between upstream and downstream orientations are discussed.•Flow measurements.

Vortex-Induced Vibration (VIV) experiments were carried out with yawed cylinders. The purpose was to investigate the validity of the Independence Principle (IP) for properly describing the flow characteristics and the dynamics of structures subjected to oblique flow. Five yaw angles in relation to the direction perpendicular to the free stream velocity were tested, namely θ=0°,10°,20°,30° and 45°. Both the upstream and downstream orientations were tested. The models were mounted on a leaf spring apparatus that allows experiments with one or two degrees of freedom. The Reynolds numbers based on the component normal to the cylinder axis fell in the interval 3×103